JP4451411B2 - Particle beam therapy system and beam course switching method thereof - Google Patents

Description

  The present invention relates to a particle beam therapy system, and more particularly, to a particle beam therapy system for irradiating a diseased site with a charged particle beam such as protons and carbon ions and a beam course switching method thereof.

  2. Description of the Related Art A treatment method for irradiating a diseased part of a patient such as cancer with a charged particle beam such as a proton is known. A large-scale treatment system used for this treatment has conventionally been provided with a charged particle beam generator, a beam transport system, and a plurality of irradiation devices installed in a plurality of treatment rooms. The charged particle beam accelerated by the charged particle beam generator reaches the irradiation device in each treatment room through the beam transport system, and is irradiated to the affected area of the patient from the nozzle of the irradiation device. At this time, the beam transport system includes one common beam transport system and a plurality of branch beam transport systems that branch from the common beam transport system and reach the irradiation apparatus in each treatment room. Each branch beam transport system is provided with a switching electromagnet for deflecting the charged particle beam from the common beam transport system and introducing it into the branch beam transport system. An electromagnet group (course electromagnet group) such as a deflecting electromagnet and a quadrupole electromagnet for guiding a charged particle beam introduced by an electromagnet to an irradiation apparatus is provided (see, for example, Patent Documents 1 and 2). The power supply group corresponding to the course electromagnet group is usually one set, and by switching the load switching device (load switcher group), one set of power supply groups is connected to the selected branch beam transport system course electromagnet group. Then, the course electromagnet group is excited to perform initialization and current setting processing.

Japanese National Patent Publication No. 11-501232 JP 2004-264781 A

  In the conventional particle beam therapy system, a charged particle beam from a common beam transport system is selectively introduced only into the treatment room at the time of irradiation treatment in each treatment room. At that time, if irradiation treatment has been performed in another treatment room until now, after the completion of irradiation in the treatment room, all switching electromagnets are controlled to be switched, and the power supply group is connected to the course electromagnet group related to the selected treatment room. Is switched, and then the course electromagnet group is initialized and the current setting process is performed, thereby forming a beam transport path to the selected treatment room.

  In this way, after completing treatment irradiation in one treatment room, when performing radiation treatment in another treatment room, in the course selection process, not only switching control of the switching electromagnet, but also connecting the power supply group to the course electromagnet group In order to do so, the switching process of the load switching device is necessary, and the total treatment time from the start of operation to the end of irradiation becomes longer by the amount of the switching time, thereby reducing the treatment efficiency.

  As a method for eliminating this switching time, it is conceivable to provide one-to-one electromagnet power supply for all the electromagnet groups of the branch beam transport system. However, in this configuration, since the number of power sources obtained by (number of branch beam transport systems) × (number of coarse electromagnet groups) is required, the number of electromagnet power sources increases as the number of treatment rooms increases.

  Further, since the power supply group corresponding to the course electromagnet group is one set, if any power supply included in the power supply group fails, it is impossible to perform treatment in any treatment room.

  A first object of the present invention is to provide a particle beam therapy system capable of reducing the number of electromagnet power supplies and a beam course switching method thereof.

  A second object of the present invention is to provide a particle beam therapy system capable of continuing treatment in at least some treatment rooms even if any power source of the electromagnet group power source group fails, and its beam course switching. Is to provide a method.

The features of the present invention for achieving the first and second objects include a charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generation. A beam transport system that transports the charged particle beam emitted from the charged particle beam generator to each of the irradiation devices, and the beam transport system is connected to the charged particle beam generator A first beam transport system and a plurality of second beam transport systems branched from the first beam transport system and connected to the respective irradiation devices, wherein the plurality of second beam transport systems are respectively In a particle beam therapy system including an electromagnet group including a plurality of electromagnets, at least two electromagnet power supply devices each having a power supply group corresponding to the electromagnet group; Provided for each stone power supply device, each having a switch group corresponding to the electromagnet group, and the power supply group of the corresponding electromagnet power supply device is related to one selected treatment room among the plurality of treatment rooms At least two load switching devices that switch to connect to the electromagnet group of the second beam transport system, and one power source group of the electromagnet power source device among the at least two electromagnet power source devices are connected to the plurality of treatment rooms. Among them, it is connected to the electromagnet group of one of the second beam transport systems related to the first treatment room that performs irradiation of the charged particle beam, and the power supply group of the other one of the electromagnet power supply devices is connected next to the first treatment room. Switching control means for controlling the at least two load switching devices to be connected to the electromagnet group of the other second beam transport system related to the second treatment room that performs irradiation of a charged particle beam;
When one of the power supplies in each of the power supply groups of the at least two electromagnet power supply devices fails, the control of the load switching device by the switching control means is invalidated, and at least the failed power supply portion with respect to the failed power supply portion Backup control means for controlling the at least two load switching devices so as to connect a power supply group of other electromagnet power supply devices not including the power supply to the corresponding electromagnets.

  Another feature of the present invention is that, in the particle beam therapy system, when the first power supply in any one of the power supply groups of the at least two electromagnet power supply devices fails, the load control device is controlled by the switch control means. The power supply other than the first power supply of the electromagnet power supply apparatus including the first power supply corresponds to the electromagnet group of the second beam transport system related to the treatment room that performs irradiation of the charged particle beam at that time. The second power source connected to the electromagnet and corresponding to the first power source of the power source group of the other electromagnet power source apparatus not including the first power source, and the second power source relating to the treatment room that performs irradiation of the charged particle beam at that time It is provided with backup control means for controlling the at least two load switching devices so as to be connected to corresponding electromagnets of the electromagnet group of the beam transport system.

  As described above, since the present invention is provided with at least two electromagnet power supply devices and at least two load switching devices, the power supply groups are switched to be connected to the electromagnet groups of the second beam transport system related to different irradiation chambers. In order to control, the electromagnet group of each 2nd beam transport system which concerns on several treatment rooms can be excited using at least two electromagnet power supply apparatus alternately. Since at least two electromagnet power supply devices are sufficient, the number of electromagnet power supplies can be reduced.

  Moreover, since the electromagnet group of each second beam transport system can be excited by alternately using at least two electromagnet power supply devices in a state where the charged particle beam is not guided to each second beam transport system, The course selection process can be performed before guiding, the course switching time is shortened, and the time for one patient to occupy the treatment room can be shortened. For this reason, the number of treatment per one irradiation apparatus can be increased.

  Also, even if one power supply of one electromagnet power supply device fails, in order to switch control to connect the power supply group of the other electromagnet power supply device to the corresponding electromagnet, at least for the failed power supply part, It becomes possible to use a power supply group of another electromagnet power supply device as a backup, and treatment in each treatment room can be continued.

  Still further, in another aspect of the present invention, the switching control unit is configured to connect the power supply group of the one other electromagnet power supply device to the electromagnet group of the second beam transport system related to the second treatment room. When controlling one load switching device, the switching state determining means for determining whether the connection is completed for all the electromagnets of the electromagnet group, and the other when the determination of the switching state determining means is affirmed The present invention further includes an initialization and current setting means for outputting a current command to one of the electromagnet power supply devices to initialize the electromagnet group and set an excitation current.

  This ensures the introduction of the charged particle beam into the intended treatment room irradiation apparatus and maintains safety.

  According to the present invention, the number of electromagnet power supplies can be reduced because the electromagnet groups of the respective second beam transport systems can be excited using the electromagnet power supply devices alternately.

  In addition, it is possible to shorten the course switching time, shorten the treatment time, and improve the treatment efficiency.

  In the unlikely event that one of the power supplies of one electromagnet power supply fails, at least for the failed power supply part, the power supply group of the other one electromagnet power supply can be used as a backup. Treatment in each treatment room can be continued.

  Furthermore, even if one individual power supply with a power supply group of one electromagnet power supply unit fails, the power supply is not used, and the corresponding individual power supply of another electromagnet power supply apparatus is operated. Thus, the operation can be continued without being greatly affected by the failure. The degree of the influence of the failure depends on the number of electromagnet power supplies that the system has. When there are two electromagnet power supply devices, it is possible to operate at the level of the prior art as a course switching time when a failure occurs. When the number of electromagnet power supply devices is 3 or more, it is possible to operate without being affected by the failure of the individual power supply.

  Here, consider a case where a plurality of individual power supply failures occur. When there are three individual power supplies in charge of a certain electromagnet, and one of the three power supplies fails, the remaining two can handle one electromagnet, so the course switching time by the switching control means of the present invention A shortening effect is obtained. The same is true when individual power supplies in charge of different electromagnets fail simultaneously. On the other hand, if there are three individual power supplies in charge of a certain electromagnet and two of the three power supplies fail, the course switching time shortening effect by the switching control means of the present invention cannot be obtained. The same operation as when there is no failure is possible.

  Hereinafter, a particle beam therapy system according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a proton beam therapy system that is a particle beam therapy system according to this embodiment includes a charged particle beam generator 1, six treatment rooms 2A, 2B, 2C, 2D, 2E, and 3, and charged particles. A first beam transport system 4 connected to the downstream side of the beam generator 1 and second beam transport systems 5A, 5B, 5C, 5D, and 5E provided so as to branch from the first beam transport system 4 are provided. It has a beam transport system, switching electromagnets (path switching devices) 6A, 6B, 6C, 6D, 6E, shutters 7A, 7B, 7C, 7D, 7E for each treatment room, and a shutter 8 common to all treatment rooms. is doing. The first beam transport system 4 is a common beam transport system that guides an ion beam to each of the second beam transport systems 5A, 5B, 5C, 5D, and 5E.

  The charged particle beam generator 1 includes an ion source (not shown), a pre-stage accelerator (pre-stage charged particle beam generator) 11 using a linear accelerator, and a synchrotron 12. Ions (for example, positive ions (or carbon ions)) generated in the ion source are accelerated by the pre-accelerator 11. The ion beam (for example, positive ion beam) emitted from the front stage accelerator 11 is incident on the synchrotron 12 via the quadrupole electromagnet 9 and the deflecting electromagnet 10. The ion beam, which is a charged particle beam (particle beam), is accelerated by the synchrotron 12 by being given energy by a high-frequency power applied from a high-frequency acceleration cavity (not shown). After the energy of the ion beam that circulates in the synchrotron 12 is increased to a set energy (for example, 100 to 200 MeV), a high frequency is applied to the ion beam from a high frequency application device (not shown) for extraction. The ion beam orbiting within the stability limit moves out of the stability limit by the application of this high frequency, and is emitted from the synchrotron 12 through an extraction deflector (not shown). When the ion beam is emitted, the current guided to the electromagnets such as the quadrupole electromagnet 13 and the deflection electromagnet 14 provided in the synchrotron 12 is held at the current set value, and the stability limit is also kept almost constant. In addition, extraction of the ion beam from the synchrotron 12 is stopped by stopping the application of the high frequency power to the high frequency application device.

  The ion beam emitted from the synchrotron 12 is transported downstream from the first beam transport system 4. The first beam transport system 4 includes a beam path 61, a quadrupole electromagnet 18 arranged in the beam path 61 from the upstream side in the beam traveling direction, a shutter 8, a deflection electromagnet 17, a quadrupole electromagnet 18, a switching electromagnet 6A, a quadrupole electromagnet 19B, and a switching. An electromagnet 6B, a quadrupole electromagnet 19C, a switching electromagnet 6C, a quadrupole electromagnet 19D, a switching electromagnet 6D, a quadrupole electromagnet 19E, and a switching electromagnet 6E are provided. The ion beam introduced into the first beam transport system 4 is converted into the second beam transport system 5A, depending on the presence or absence of a deflection action by switching between excitation and non-excitation of these electromagnets and switching electromagnets 6A, 6B, 6C, 6D, 6E. 5B, 5C, 5D, and 5E are selectively introduced. Each switching electromagnet is a kind of deflection electromagnet.

  The second beam transport system 5A is connected to the beam path 61 of the first transport system 4 and communicates with the irradiation device 15A disposed in the treatment room 2A, and the beam path 62A is upstream of the beam traveling direction. Further, a deflection electromagnet 21A, a quadrupole electromagnet 22A, a shutter 7A, a deflection electromagnet 23A, a quadrupole electromagnet 24A, a deflection electromagnet 25A, and a deflection electromagnet 26A are provided. It can be said that the switching electromagnet 6A is disposed in the beam path 62A.

  The second beam transport system 5B, the second beam transport system 5C, the second beam transport system 5D, and the second beam transport system 5E are configured in the same manner as the second beam transport system 5A. In these second beam transport systems 2B to 2E, components equivalent to those of the second beam transport system 2A are indicated by subscripts B, C, D, and E instead of the same reference numerals. ing.

  The ion beam introduced into the second beam transport system 5A is transported to the irradiation device 15A through the beam path 62A by excitation of the corresponding electromagnet. Similarly, in the second beam transport systems 5B, 5C, 5D, and 5E, the ion beam is transported to the irradiation devices 15B, 15C, 15D, and 15E through the beam paths 62B, 62C, 62D, and 62E, respectively.

  The irradiation devices 15A to 15E are attached to rotating gantry (not shown) installed in the treatment rooms 2A to 2E, respectively. The irradiation devices 15A to 15E are double scatterer type irradiation devices. For these, a wobbling type irradiation apparatus may be used. The treatment rooms 2A to E are, for example, first to fifth treatment rooms for cancer patients, and the treatment room 3 is a sixth treatment room for ophthalmic treatment that includes a fixed irradiation device 16.

  The electromagnet groups provided in the second beam transport systems 5A-5E are electromagnets specific to the treatment rooms 2A-2E, and the electromagnets provided in the synchrotron 12 of the charged particle beam generator 1 and the first beam transport system 4. The group is an electromagnet group common to the treatment rooms 2A to 2E. In the present specification, the electromagnet groups provided in the second beam transport systems 5A to 5E are called coarse electromagnet groups, and the electromagnet groups provided in the synchrotron 12 and the first beam transport system 4 of the charged particle beam generator 1. Is called a common part electromagnet group. The course electromagnet group and the common part electromagnet group are specifically listed below.

<Course electromagnet group>
1. Treatment room 2A: Electromagnet group of the second beam transport system 5A (deflection electromagnet 21A, quadrupole electromagnet 22A, deflection electromagnet 23A, quadrupole electromagnet 24A, deflection electromagnet 25A, deflection electromagnet 26A).

  2. Treatment room 2B: Electromagnet group of the second beam transport system 5B (deflection electromagnet 21B, quadrupole electromagnet 22B, deflection electromagnet 23B, quadrupole electromagnet 24B, deflection electromagnet 25B, deflection electromagnet 26B).

  3. Treatment room 2C: Electromagnet group of the second beam transport system 5C (the deflection electromagnet 21C, the quadrupole electromagnet 22C, the deflection electromagnet 23C, the quadrupole electromagnet 24C, the deflection electromagnet 25C, and the deflection electromagnet 26C).

  4). Treatment room 2D: Electromagnet group of the second beam transport system 5D (deflection electromagnet 21D, quadrupole electromagnet 22D, deflection electromagnet 23D, quadrupole electromagnet 24D, deflection electromagnet 25D, deflection electromagnet 26D).

  5. Treatment room 2E: Electromagnet group of second beam transport system 5E (deflection electromagnet 21E, quadrupole electromagnet 22E, deflection electromagnet 23E, quadrupole electromagnet 24E, deflection electromagnet 25E, deflection electromagnet 26E).

<Common part electromagnet group>
1. An electromagnet group of the synchrotron 12 (a quadrupole electromagnet 13 and a deflection electromagnet 14).

  2. Electromagnet group of the first beam transport system 4 (quadrupole electromagnet 18, deflecting electromagnet 17, quadrupole electromagnet 18, switching electromagnet 6A, quadrupole electromagnet 19B, switching electromagnet 6B, quadrupole electromagnet 19C, switching electromagnet 6C, quadrupole electromagnet 19D, switching electromagnet 6D, Quadrupole electromagnet 19E, switching electromagnet 6E).

  The course electromagnet group is partially omitted. For example, in each of the second beam transport systems 5A to 5E, only two quadrupole electromagnets are shown, but actually there are more (4 to 5). In addition, the steering electromagnet is omitted in each of the second beam transport systems 5A to 5E.

  Next, the control system of the proton beam therapy system of this embodiment will be described.

  The proton beam therapy system of this embodiment includes a control device 40, and the control device 40 includes a control unit 41, two electromagnet power supply devices 42A and 42B, and two load switching devices 43A and 43B. .

  The electromagnet power supply devices 42A and 42B are for exciting the electromagnet groups of the second beam transport systems 5A to 5E, that is, the electromagnets included in the coarse electromagnet groups, respectively. The electromagnet power supply device 42A corresponds to each electromagnet included in each course electromagnet group in a one-to-one correspondence (power source (individual power source) 30A1 to 30An shown in FIG. 2 (for example, each electromagnet 21A of the second beam transport system 5A, 22A, 23A, 24A, 25A, 26A,... The entire power sources included in the electromagnet power supply 42A are hereinafter referred to as an electromagnet power supply group A. Similarly to the electromagnet power supply device 42A, the electromagnet power supply device 42B has the power supplies (individual power supplies) 30B1 to 30Bn shown in FIG. 2 corresponding one-to-one with the electromagnets included in each course electromagnet group. The entire power sources included in the electromagnet power supply device 42B are hereinafter referred to as an electromagnet power supply group B.

  The load switching devices 43A and 43B respectively select one of the electromagnet power supply groups A and B according to a switching command based on a course selection command (described later) as one selected course electromagnet from the second beam transport systems 5A to 5E. It is for switching to connect to the group. The load switching device 43A is provided in one-to-one correspondence with the power sources 30A1 to 30An included in the electromagnet power source device 42A and connected to one corresponding power source (for example, the switchers 31A1 to 31An shown in FIG. Each electromagnet 21A, 22A, 23A, 24A, 25A, 26A,... Of the two-beam transport system 5A is provided. Those switches included in the load switching device 43A are referred to as a load switch group A. Similarly to the load switching device 43A, the load switching device 43B is provided in one-to-one correspondence with the power sources 30B1 to 30Bn included in the electromagnet power source device 42B and connected to one corresponding power source as shown in FIG. The units 31B1 to 31Bn are provided. Those switching devices included in the load switching device 43B are referred to as a load switching device group B.

  There are as many power supplies as the electromagnet power supply devices 42A and 42B and the same number of switchers as the load switching devices 43A and 43B as the number of electromagnets included in one course electromagnet group. Each of the switching devices 31A1 to 31An connects one corresponding power supply to one of the five electromagnets having the same arrangement order in the second beam transport systems 5A to 5E by a switching operation. Similarly, each of the switchers 31B1 to 31Bn connects one corresponding power supply to one of those electromagnets by a switching operation. For example, the switch 31A1 connects the power source 30A1 to one of the deflection electromagnets 21A, 21B, 21C, 21D, and 21E of the second beam transport systems 5A to 5E by a switching operation. Further, the switch 31B1 connects the power source 30B1 to one of the deflection electromagnets 21A, 21B, 21C, 21D, and 21E of the second beam transport systems 5A to 5E by a switching operation.

  The control unit 41 receives a treatment room preparation completion signal 51 from each of the treatment rooms 2A to E, 3 (or a control room corresponding to each treatment room), selects a treatment room that transports the irradiation beam, and selects the electromagnet power supply group A. Alternatively, the load switch group A or B is switched so as to be connected to the course electromagnet group related to the selected treatment room. For example, the treatment room where the ion beam is guided at that time (hereinafter referred to as the treatment room being treated) is the treatment room 2C and the electromagnetic power supply group B is used, and the treatment is performed next to the treatment room being treated. When the treatment room (to which the ion beam is guided) (hereinafter referred to as the selected next treatment room) is the treatment room 2A, the control unit 41 treats each power source included in the electromagnetic power supply group A in the standby state. Each switch of the load switch group A is switched so as to be connected to the corresponding electromagnet included in the coarse electromagnet group related to the chamber 2A. This switching operation is performed when the ion beam emitted from the synchrotron 12 is guided by the switching electromagnet 6C to the second beam transport system 5C connected to the irradiation device 15C in the treatment room 2C being treated. Done in parallel. In addition, after confirming that the switching operation by the load switch group A has been completed, the control unit 41 controls each power source of the electromagnet power source group A to initialize each electromagnet included in the course electromagnet group and the electromagnets thereof. Excitation current setting processing for.

  As shown in FIG. 2, the control unit 41 includes a control circuit 33, a first come first service (FCFS) circuit 35, a storage device 32 for storing operation parameters, a standby queue circuit (electromagnet power allocation means) 34, a course A selection state determination circuit (switching state determination means) 36 is provided. In the figure, the solid line indicates the flow of processing on the actual operation side (described later), and the broken line indicates the flow of processing on the standby operation side (described later). In FIG. 2, for convenience of explanation, the electromagnet power supply devices 42A and 42B and the load switching devices 43A and 43B are shown as representatives of the power supply group and the switch group, respectively. Moreover, the control part of the treatment room 3 is omitted.

  The first arrival determination circuit 35 receives the treatment room preparation completion signals 51 from the treatment rooms 2A to E, 3 and determines the arrival order of the treatment room preparation completion signals 51 (the order in which treatment room preparations are completed). The treatment room number is output in order.

  The waiting queue circuit 34 is an electromagnet power supply allocating means, and based on the arrival order from the first arrival determination circuit 35 and the treatment room information, the electromagnet power supply groups A and B for the course electromagnet group corresponding to the next selected treatment room. Management of allocation to one of the above.

  The control circuit 33 performs standby operation processing and actual operation processing based on the power supply group allocation information from the standby matrix circuit 34, the determination information of the course selection state determination circuit 36, and the operation parameter information from the storage device 32.

  In the standby operation process, the control circuit 33 creates a course selection command and an excitation current command for the next treatment room selected based on the power supply group allocation information from the standby matrix circuit 34. The control circuit 33 outputs a switching command corresponding to the course selection command to one of the load switching devices 43A and 43B that is in a standby state, and switches each switch of the load switching device. In addition, the control circuit 33 confirms that switching of each switch of the load switching device in the standby state is completed based on the determination information of the course selection state determination circuit 36, and then transfers from the storage device 32 to the corresponding treatment room. Read the relevant operation parameter (current setting value) and create an excitation current command. The created excitation current command is output to each power source of one of the electromagnet power supply devices 42A and 42B that is in a standby state. Thereby, each electromagnet of the coarse electromagnet group for the next selected treatment room connected to each power source of the electromagnet power source group in the standby state is excited by each switch of the load switch group in the standby state. By this operation, the initialization of the electromagnets and the excitation current setting process are performed in parallel with the state in which the ion beam is guided to the irradiation device 15C of the treatment room 2C being treated as described above.

  After completion of irradiation in the treatment room being treated, the control circuit 33 completes the above-described initialization and excitation current setting process corresponding to the course electromagnet group in a standby state (corresponding to the selected next treatment room. When there is a course electromagnet group), determination information “irradiation permission is present” is generated, and actual operation processing is performed. The accelerator control device 39 (FIG. 1), which is another control device to which the determination information “irradiation permission is present”, is input, in the actual operation process, the common part electromagnet group (the electromagnet group of the first beam transport system 4, the synchrotron). 12 electromagnet groups) and the excitation current setting process. However, the initialization of the electromagnets of the electromagnet group of the first beam transport system 4 and the setting of the excitation current are performed in accordance with the second beam transport system (for example, the next next selected in the treatment room). If the treatment room is the treatment room 2A, a switching electromagnet (for example, a switching electromagnet 6A) that guides an ion beam to the second beam transport system 5A), and each electromagnet located upstream of the switching electromagnet in the first beam transport system 4 To be done. In the first beam transport system 4, initialization and excitation current setting are not performed for each electromagnet located on the downstream side of the switching electromagnet. When determining that “irradiation permission is present”, the control circuit 33 stores first flag information indicating that an actual operation process for the next selected treatment room has been started.

  The course selection state determination circuit 36 determines whether or not the switching of the load switch groups A and B is completed based on the switching state signal from each switch of the load switching devices 43A and 43B, and the determination result is sent to the control circuit 33. Output.

  The storage device 32 stores operation parameters for creating an excitation current command in the control circuit 33. This operating parameter is created in advance based on irradiation conditions obtained from treatment plan data (patient ID number, irradiation dose, irradiation energy, gantry angle, irradiation field diameter, irradiation position, etc.) for each patient. Includes a current setting value for the electromagnet group of the second beam transport systems 5A to 5E, a current setting value for the common part electromagnet group, and the like.

  The structure of the course selection state determination circuit 36 and the load switching device 43A will be described with reference to FIG. Although not shown in FIG. 3, the load switching device 43B has the same configuration as the load switching device 43A.

  The load switching device 43A includes a contactor group 44A including contactors 44A1 to 44An provided in one-to-one correspondence with the respective electromagnets of the respective course electromagnet groups of the second beam transport systems 5A to 5E, and the second beam transport system 5A. To 5E, and the auxiliary relay group 45A including the auxiliary relays 45A1 to 45An provided in one-to-one correspondence with the respective electromagnets of the course electromagnet group. Further, for example, the switch 31A1 includes a contactor 44A1 and an auxiliary relay 45A1. The switch 31A2 includes a contactor 44A2 and an auxiliary relay 45A2.

  Each of the contactors 44A1 to 44An connects the electromagnet power supply group A to the selected one of the course electromagnet groups of the second beam transport systems 5A to 5E in response to a switching command based on the course selection command. A plurality of contacts that are switched to The auxiliary relays 45A1 to 45An are arranged in a plurality of switching state detection lines 46A to 46E provided corresponding to the second beam transport systems 5A to 5E, respectively. Each of the auxiliary relays 45A1 to 45An has a plurality of contacts that close according to the switching state of the corresponding contactor among the contactors 44A1 to 44An.

  The course selection state determination circuit 36 includes a plurality of course selection completion determination units 37A to 37E and continuity determination units 38A to 38E provided corresponding to the second beam transport systems 5A to 5E, respectively.

  The continuity determination units 38A to 38E determine whether the switching state detection lines 46A to 46E are in the conductive state, respectively. If it is in the conductive state, the continuity determination units 38A to 38E are configured such that all of the contactors 44A1 to 44An use the respective power supplies of the electromagnet power supply group A for the second beam transport system selected from the second beam transport systems 5A to 5E. It determines with having switched so that it may connect with each electromagnet. Course information based on this determination result is output from each of the continuity determination units 38A to 38E to the corresponding course selection completion determination units 37A to 37E. For example, as described above, the standby operation process is performed on the electromagnet group of the second beam transport system 5A that is the next treatment room in which the treatment room 2A is selected and is connected to the irradiation device 15A in the treatment room 2A. Suppose (state of FIG. 2, FIG. 3). In all of the auxiliary relays 45A1 to 45An, the contacts corresponding to the second beam transport system 5A are closed, and the switching state detection line 46A is in a conductive state. For this reason, the continuity determination unit 38A determines that all of the contactors 44A1 to 44An have been switched to connect each power source of the electromagnet power source group A to each electromagnet of the coarse electromagnet group of the second beam transport system 5A. Course information (for example, an ON signal) based on the determination result is input to the course selection completion determination unit 37A.

  The course selection completion determination units 37A to 37E respectively compare the course information based on the course selection command given from the control circuit 33 to the load switching device 43A and the course information based on the determination results of the continuity determination units 38A to 38E. When the course selection completion determination units 37A to 37E match each other, the load switching device 43A connects the electromagnet power supply group A to one electromagnet group selected from the electromagnet groups of the second beam transport systems 5A to 5E. It is determined that the switching (course switching) has been performed in accordance with the course selection command. The determination result is input to the control circuit 33. The course selection information based on the course selection command in the standby operation processing of FIGS. 2 and 3 described above is information that gives an ON signal to the course selection completion determination unit 37A, for example. The course information from the continuity determination unit 38A is also an ON signal. Therefore, the course selection completion determination unit 37A is switched so that each contactor of the load switching device 43A connects each power supply of the electromagnet power supply group A to each corresponding electromagnet group of the second beam transport system 5A, and It is determined that switching (course switching) has been performed on the second beam transport system 5A in accordance with the course selection command. The determination result is input to the control circuit 33.

  Further, the electromagnet power supply devices 42A and 42B have a function of monitoring the operating states of the respective power supplies included in the electromagnet power supply groups A and B and outputting the state information as state signals. The state information of each power source is for obtaining failure information as to whether or not each power source has failed, and includes, for example, the power source temperature, the power source voltage, the cooling water flow rate, the cooling fan rotation speed, the fuse state, and the like. If any of the abnormal rises in power supply temperature (overheating), abnormal rises in power supply voltage (overvoltage), abnormal decrease in cooling water flow rate, abnormal decrease in fan speed, blown fuse, etc., the power supply has failed. Can be considered.

  The control circuit 33 takes in the status signal of each power source of the electromagnet power supply devices 42A and 42B via a signal input means (not shown) of the control unit 41, and the power source of any of the electromagnet power source devices 42A and 42B is based on the status information. If there is no failure, the power allocation information from the standby queue circuit 34 (electromagnet power allocation means) is validated. If there is a malfunction, the power allocation information is invalidated, and at least The power supply group is reassigned using a power supply group of another electromagnet power supply apparatus that does not include the failed power supply, and the load switching device 43A or 43B is controlled based on the result of the reassignment.

  Details of processing contents of the control circuit 33 and the accelerator control device 39 will be described with reference to FIG.

  First, the control circuit 33 recognizes an electromagnet power supply apparatus that is in an empty state (not connected to the course electromagnet group) (step 70). This recognition is performed using second flag information indicating completion of irradiation stored in the control circuit 33 when irradiation is completed in steps 79 and 89 described later. Then, using the recognized standby electromagnetic power supply (electromagnetic power supply 42A or 42B), the standby operation processing for the course electromagnet group of the second beam transport system communicated with the irradiation device in the next selected treatment room Is implemented. The standby operation processing using the electromagnet power supply device 42A and the subsequent actual operation processing are referred to as A-side processing. The standby operation processing using the electromagnet power supply 42B and the subsequent actual operation processing are referred to as B-side processing.

  When the treatment room 2C is under treatment, the treatment room 2A is the next treatment room selected, and the electromagnet power supply device 42A and the load switching device 43A are in a standby state, the treatment room 2C is under treatment. Of the switching electromagnets 6A to 6E, only the switching electromagnet 6C is excited, and the ion beam is guided to the second beam transport system 5C by the switching electromagnet 6C. In the waiting queue circuit 34, it is assumed that the treatment room 2E is selected as a treatment room for treatment next to the treatment room 2A. In this case, the A-side process is performed for the course electromagnet group corresponding to the treatment room 2A, and the B-side process is performed for the course electromagnet group corresponding to the treatment room 2E after the treatment in the treatment room 2C is completed. .

  If the electromagnet power supply devices 42A and 42B are both vacant (for example, when treatment is performed for the first time in a day), it corresponds to the treatment room selected by the queuing circuit 34 as being initially prepared. The coarse electromagnet group to be initialized is subjected to initialization and excitation current setting processing by the electromagnet power supply 42A (A-side processing). In addition, for the coarse electromagnet group corresponding to the treatment room selected by the waiting queue circuit 34 that the preparation has been completed, initialization and excitation current setting processing are performed by the electromagnet power supply 42B (B-side processing).

  Further, the control circuit 33 takes in the status signals of the respective power supplies of the electromagnet power supply devices 42A and 42B, confirms whether any of the respective power supplies of the electromagnet power supply devices 42A and 42B has failed based on the status information, If there is no power failure, the power allocation information from the standby queue circuit 34 (electromagnet power allocation means) is validated, and the process proceeds to the A side process or the B side process (step 110). On the other hand, if any one of the power supplies of the electromagnet power supply devices 42A and 42B has failed, the power allocation information from the standby queue circuit 34 is invalidated and the power is reassigned (step 111). There are the following two methods for reallocating power.

  (1) Use only an electromagnet power supply device in which the power supply has not failed. For example, when one of the power supplies of the electromagnet power supply 42A fails, the electromagnet power supply 42A is not used, and only the electromagnet power supply 42B is used.

  (2) A non-failed power supply of an electromagnet power supply device in which one of the power supplies has failed and a power supply corresponding to the failed power supply of another electromagnet power supply device are used. For example, when one of the power supplies of the electromagnet power supply 42A fails, the other power supply of the electromagnet power supply 42A and the power supply corresponding to the failed power supply of the electromagnet power supply 42B are used.

  The processing functions of the above steps 110 and 111 constitute a backup control means.

  Next, the process proceeds to A-side processing or B-side processing.

<A side processing>
This A-side processing includes operation parameter acquisition processing (step 71), course selection processing (step 72), switching state determination processing (step 73), initialization and excitation current setting processing (step 74), and power failure confirmation processing (step 112), irradiation permission determination processing (step 75), common part electromagnet initialization and excitation current setting processing (step 76), operator irradiation operation determination processing (step 77), irradiation processing (step 78), irradiation completion determination processing (step) 79), each process of the standby course determination process (step 80) is performed. The processing of steps 71 to 75, 77, 79 and 80 is performed by the control circuit 33. Steps 76 and 78 are performed by the accelerator control device 39. The case where the treatment room 2C is being treated, the next treatment room selected is the treatment room 2A, and the treatment room selected next is the treatment room 2E. A typical processing content will be described below.

1. Operation parameter acquisition processing (step 71)
The control circuit 33 inputs information on the next treatment room selected from the waiting queue circuit 34, that is, the treatment room 2A. Based on the input information, the control circuit 33 acquires, from the storage device 32, operating parameters created based on the treatment plan data of the patient who receives treatment in the treatment room 2A.

2. Course selection process (step 72)
The control circuit 33 creates a course selection command for the treatment room 2A, and outputs a switching command based on the course selection command to the load switching device 43A. The load switching device 43A switches each of the contactors 44A1 to 44An of the load switching device group A so as to connect each power source of the electromagnet power supply device 42A to each electromagnet of the course electromagnet group related to the treatment room 2A. The processing function of step 72 constitutes a switching control means.

3. Switching state determination processing (step 73)
The control circuit 33 confirms whether each switching of the contactors 44A1 to 44An has been normally completed based on the information of the determination result of the course selection state determination circuit 36. The course selection state determination circuit 36 and the processing function of step 73 constitute a switching state determination means.

4A. Initialization and excitation current setting processing (step 74)
After confirming the completion of normal switching of each contactor, the control circuit 33 sets the operation parameters (for example, excitation current setting) for each electromagnet of the course electromagnet group (the course electromagnet group in the standby state) related to the treatment room 2A among the operation parameters. Value), the excitation current commands for these electromagnets are created. Each power source of the electromagnet power supply 42A is controlled by the control circuit 33 based on each excitation current command, and excites each electromagnet of the course electromagnet group. Thereby, initialization of these electromagnets and excitation current setting processing are performed. The processing function of step 74 constitutes initialization and current setting means.

4B. Power failure confirmation process (step 112)
Even after entering the A-side process, the control circuit 33 takes in the status signals of the power supplies of the electromagnet power supply devices 42A and 42B, and one of the power supplies of the electromagnet power supply devices 42A and 42B fails based on the status information. The process proceeds to the next process only when there is no power failure, and if any of the power supplies has failed, the A-side process is terminated and the process proceeds to the power reassignment process at step 111. . In this case, there are two methods (1) and (2) for reassigning power.

  As a case where the power supply fails after entering the A-side process, for example, after the course selection process (step 72) is normally performed, any of the electromagnet power supply devices 42A during the course electromagnet initialization operation is executed. The power supply may be broken. In FIG. 4, for the sake of convenience, the power failure check process is shown next to the initialization and excitation current setting process. In this power failure check process, irradiation is executed after entering the A side process (step 78). ), And when it is confirmed that one of the power supplies of the electromagnet power supply device 42A has failed, the A-side process is immediately terminated and the process proceeds to the power reassignment process in step 111. .

  The processing function of step 112 also constitutes a backup control means.

5). Irradiation permission determination process (step 75)
The control circuit 33 determines whether irradiation is permitted (introduction of the ion beam to the irradiation device 15A in the treatment room 2A is permitted). This determination is performed based on the “irradiation permission” information generated when it is determined that “waiting course is present” in step 90 of the B-side processing after completion of the ion beam irradiation in the treatment room 2C. . In step 75, “irradiation permission is present” is determined based on the “irradiation permission” information. As a result of this determination, the control circuit 33 outputs determination information “with irradiation permission” to the accelerator control device 39. Note that “there is a standby course” means that initialization and excitation current setting processing have been completed for each electromagnet of the course electromagnet group in the standby state. When the control circuit 33 determines that “irradiation permission is present”, the control circuit 33 stores the first flag information described above.

6). Common part electromagnet group initialization and exciting current setting processing (step 76)
When the accelerator control device 39 inputs the determination information “with irradiation permission”, the common part electromagnet group (the switching electromagnet 6A among the electromagnet groups of the first beam transport system 4 and the electromagnets upstream of this, the synchrotron 12). The electromagnet group) is initialized and the current is set. The initialization and current setting processing of these electromagnets is illustrated by the excitation current command created by the accelerator control device 39 based on the operation parameters (for example, the excitation current setting value) of the common part electromagnet group acquired from the storage device 32. This is done by controlling the power supply group not to excite the common part electromagnet group. When the switching electromagnet 6A is excited, the ion beam can be guided from the first beam transport system 4 to the second beam transport system 5A.

7). Operator irradiation operation determination processing (step 77)
The control circuit 33 determines the irradiation operation based on the irradiation start signal for the treatment room 2A. This determination is performed as follows, for example. That is, after completion of the common part electromagnet initialization and setting process, a signal indicating completion of irradiation preparation on the machine side is displayed on a display (not shown) of a console corresponding to the treatment room 2A. The doctor who sees the display operates an irradiation instruction switch (not shown) provided on the console to output an irradiation start signal. When the irradiation start signal is input, the control circuit 33 determines that the irradiation start operation has been performed on the treatment room 2A.

8). Irradiation process (step 78)
When it is determined that the irradiation start operation has been performed on the treatment room 2 </ b> A, the control circuit 33 outputs an extraction start signal to the accelerator controller 39. The accelerator controller 39 applies an ion beam that circulates a high-frequency signal from an extraction high-frequency application device (not shown) of the synchrotron 12 based on the extraction start signal, and causes the ion beam to be emitted from the synchrotron 12. The emitted ion beam is irradiated to the affected part of the patient from the irradiation device 15A through the switching electromagnet 6A and the second beam transport system 5A.

  The processing functions of the above steps 75 to 78 constitute an irradiation control means.

9. Irradiation completion determination process (step 79)
When the extraction stop signal is input from the accelerator controller 39, the control circuit 33 determines that the ion beam irradiation in the treatment room 2A has been completed. At this time, the control circuit 33 stores the second flag information.

10. Waiting course determination process (step 80)
When the irradiation in the treatment room 2A is completed, the control circuit 33 determines whether there is a standby course electromagnet group for which initialization and excitation current setting processing has been completed. Since the initialization of each electromagnet of the electromagnet group of the second beam transport system 5E corresponding to the treatment room 2E has been completed, the control circuit 33 determines that “the waiting course is present”. By this determination, information on “irradiation permission” is output to the accelerator control device 39 that executes step 85 of the B-side process. If there is no course electromagnet group in the standby state, this process is terminated.

<B side processing>
The B side process is also an operation parameter acquisition process (step 81), a course selection process (step 82), a switching state determination process (step 83), an initialization and excitation current setting process (step 84), and a power failure check process (step 113). ), Irradiation permission determination processing (step 85), common part electromagnet initialization and excitation current setting processing (step 86), operator irradiation operation determination processing (step 87), irradiation processing (step 88), irradiation completion determination processing (step 89) ), Each process of the standby course determination process (step 90) is performed. Since the processing content of each step of the B side processing is the same as that of each step of the A side processing, the description thereof is omitted.

  When the first flag information is generated in the A-side process, the control circuit 33 waits in the B-side process for the next treatment room 2E selected in parallel with the actual operation process in the A-side process for the treatment room 2A. Run the operation process. In the above A side processing and B side processing, until it is determined that “irradiation permission is present” in Steps 75 and 85, the processing for the course electromagnet group corresponding to the selected next treatment room (Steps 71 to 74, 81). Processes -84) are standby operation processes, and the processes after determining that the irradiation is permitted in steps 75 and 85 (processes in steps 77-80 and 87-90) are actual operation processes.

  Next, the operation of this embodiment will be described with reference to FIG. FIG. 5 shows the treatment room setting state based on the treatment room preparation completion signal, the output state of the standby matrix circuit 34 (actual operation side), the output state of the standby matrix circuit 34 (standby operation side), and the common part electromagnet group sequentially from the upper stage. , The operation state of the electromagnet power supply group A, and the operation state of the electromagnet power supply group B. In the figure, the mesh portion indicates initialization and excitation current setting processing, and the shaded portion indicates course selection processing for switching the load.

  It is assumed that the first arrival determination circuit 35 inputs the preparation completion signal 51 from the treatment room 2C at the time T1, from the treatment room 2A at the time T2, and from the treatment room 2E at the time T3 in the state where the treatment is performed first in one day. To do. In this case, the first arrival determination circuit 35 determines the order of treatment in the order of the treatment rooms 2C, 2A, and 2E according to the arrival order of the preparation completion signals 51, and waits for the treatment room number (treatment room information) in that order. Output to the matrix circuit 34. At time T1, neither of the electromagnet power supply groups A and B is used. The treatment room number of the treatment room 2 </ b> C is stored in the actual operation side area of the waiting queue circuit 34. For this reason, as described above, the course electromagnet group corresponding to the treatment room 2C that has been initially prepared is initialized and the excitation current setting process is performed by the electromagnet power supply group A. That is, the A-side process course selection process (step 72), the course electromagnet group initialization process, the current setting process (step 74), and the like are executed for each electromagnet of the course electromagnet group. The common operation electromagnet group initialization processing including 6C switching processing, excitation current setting processing (step 76), and actual operation processing such as ion beam irradiation (step 78) are executed.

  At the time T2 during the irradiation process in the treatment room 2C, the treatment room number of the treatment room 2A is stored in the standby side area of the standby matrix circuit 34. For the electromagnet group of the second beam transport system 2A corresponding to the treatment room 2A, the standby operation process in the B-side process using the electromagnet power supply group B, that is, the course selection process (step 82) and its electromagnet Group initialization, current setting processing (step 84), and the like are performed. When the irradiation process (step 78) of the treatment room 2C is completed at the time T4, the treatment room number of the treatment room 2A is shifted to the actual operation side area of the waiting queue circuit 34. Then, initialization and excitation current setting processing (step 86) including switching processing of the switching electromagnet 6A is performed on the common part electromagnet group which is used to guide the ion beam to the treatment room 2A. Is called. When this is completed, the process proceeds to the irradiation process (step 88) in the treatment room 2A.

  On the other hand, at the time T3 during the irradiation process of the treatment room 2C and the standby operation process of the treatment room 2A, the treatment room number of the treatment room 2E is input to the standby matrix circuit 34 by the input of the preparation completion signal from the treatment room 2E. . At this time, since the electromagnet power supply groups A and B are both in use, the standby operation process is not executed for the electromagnet group of the second beam transport system 5E corresponding to the treatment room 2E. When the irradiation process (step 78) of the treatment room 2C is completed at time T4, the treatment room number of the treatment room 2E is stored in the standby side area of the standby matrix circuit 34. Using the electromagnet power supply group A that has become free, the course selection process (step 72), which is a standby operation process, and the initial stage of the electromagnet group for the electromagnet group of the second beam transport system 2E corresponding to the treatment room 2E And excitation current setting processing (step 74) are performed.

  When the irradiation process (step 88) of the treatment room 2A is completed at the time T5, the treatment room number of the treatment room 2E is shifted to the actual operation side area of the waiting queue circuit 34. An initialization and excitation current setting process (step 86) including a switching process of the switching electromagnet 6E is performed on the common part electromagnet group in an empty state, which is used to guide the ion beam to the treatment room 2E. When this is completed, the process proceeds to the irradiation process (step 88) in the treatment room 2E. Thereafter, the B-side process and the A-side process using the electromagnet power supply groups B and A alternately are repeated in the order of the treatment rooms determined by the first arrival determination circuit 35.

  The operation of the conventional particle beam therapy system will be described with reference to FIG. FIG. 6 shows the treatment room setting state by the treatment room preparation completion signal, the output state of the first arrival determination circuit 35 (actual operation), the operation state of the common part electromagnet group, and the operation state of the electromagnet power source group A sequentially from the upper stage. Yes. In the conventional system, there is only one set of electromagnet power supply groups, and in FIG. In the figure, the mesh portion indicates initialization and excitation current setting processing, and the shaded portion indicates course selection processing for switching the load.

  Similarly to FIG. 5, it is assumed that the first arrival determination circuit 35 determines the order of treatment in the order of the treatment rooms 2C, 2A, and 2E in the state where treatment is performed first in a day. When the treatment room 2C is set in the waiting queue circuit 34 in a state where the electromagnetic power supply group A at the time point T1 is not used, initialization and excitation by the electromagnetic power supply A for the coarse electromagnet group corresponding to the treatment room 2C. A current setting process is performed. Further, initialization of the common part electromagnet group including switching processing of the switching electromagnet 6C and excitation current setting processing are performed almost simultaneously. When these processes are completed, the process proceeds to the irradiation process in the treatment room 2C.

  When the treatment room 2A is set at the time T2 during the irradiation process in the treatment room 2C, the electromagnet power supply group A and the common part electromagnet group are both in use, so that the initial setting for the course electromagnet group corresponding to the treatment room 2A Processing such as conversion is not executed. The same applies to the case where the treatment room 2E is set in the waiting queue circuit 34 at the time T3 during the irradiation process in the treatment room 2C. At the time T4, when the irradiation process in the treatment room 2A is completed, the electromagnet power supply group A and the common part electromagnet group are vacant, so the load switch group is switched to the course electromagnet group related to the treatment room 2A. The course selection process to connect is performed. In addition, initialization of the coarse electromagnet group and excitation current setting processing by the electromagnet power supply group A for irradiation in the treatment room 2A, and initialization of the common electromagnet group and excitation current setting processing including switching processing of the switching electromagnet 6A are performed. Do. When these processes are completed, the process proceeds to the irradiation process in the treatment room 2A. When the irradiation process of the treatment room 2A is completed at the time point T5, similarly, the course selection process for the course electromagnet group related to the treatment room 2E, and the initialization and the excitation current setting process by the electromagnet power supply group A for the course electromagnet group are performed. Do. Furthermore, initialization of the common part electromagnet group and excitation current setting processing (including switching processing of the switching electromagnet 6E) are performed. When these processes are completed, the process proceeds to the irradiation process of the treatment room 2E.

  As described above, in the conventional system, in the ion beam irradiation treatment in the treatment room 2A or 2E following the first treatment room 2C, the coarse electromagnet group related to the treatment room 2A or 2E is connected to the electromagnet power supply group A. The course selection process, the common part electromagnet group initialization process and the excitation current setting process (including the switching electromagnet switching process) need to be performed almost simultaneously, and the course selection process time for the course electromagnet group (load switcher group) The switching time of the course is longer, and the course switching time is longer, and accordingly, the treatment time is longer and the treatment efficiency is lowered.

  On the other hand, this embodiment was selected during the actual operation (in parallel with the actual operation) of exciting the corresponding course electromagnet group by using the electromagnet power supply group A and transporting the ion beam to the treatment room 2C. The course selection process for connecting the course electromagnet group related to the next treatment room 2A to the electromagnet power supply group B in the standby state, the initialization of the latter course electromagnet group by the electromagnet power supply group B, and the excitation current setting process are set as standby operations in advance. It can be carried out. For this reason, the actual operation of transporting the ion beam to the treatment room 2A immediately after the completion of irradiation in the treatment room 2C becomes possible. The time for which one patient occupies the treatment room 2A (referred to as treatment time) is shortened, and the number of treatment persons per irradiation apparatus can be increased. As described above, according to the present embodiment, it is possible to shorten the course switching time, shorten the treatment time, and improve the treatment efficiency.

  In addition, since the present embodiment uses two electromagnet power supply devices (two sets of electromagnet power groups A and B), the electromagnet power groups A and B can be shared by the five coarse electromagnet groups. The number of power supplies for the five course electromagnet groups can be significantly reduced. In the particle beam therapy system disclosed in Japanese Patent Laid-Open No. 2004-264781, one power source is installed for each quadrupole electromagnet and each steering electromagnet included in each course electromagnet group. It is only necessary to install each power source of the electromagnet power source groups A and B used in the above. For this reason, in this embodiment, especially each power source used for those 4 pole electromagnets and steering electromagnets decreased remarkably. Thereby, the particle beam therapy system can be simplified.

  In addition, according to the present embodiment, after the course selection process is confirmed by the course selection state determination circuit 36, the initialization and excitation current setting process of each electromagnet included in the corresponding course electromagnet group is performed. Followed by subsequent irradiation. For this reason, irradiation of the ion beam in the selected treatment room can be performed reliably, and safety can be maintained.

  Next, the operation at the time of power failure according to this embodiment will be described.

  FIG. 7 shows an operation example when one of the individual power supplies of the electromagnet power supply 42A fails. The electromagnet power source 42A is composed of n individual power sources 30A1,..., 30Ak,. Similarly, the electromagnet power supply device 42B includes n individual power supplies 30B1, ..., 30Bk, ..., 30Bn. Here, it is assumed that the electromagnet power supply 42A is in an empty state and the individual power supply 30Ak of the electromagnet power supply 42A has failed. In this case, in this operation example, the corresponding individual power supply 30Bk of the electromagnet power supply apparatus 42B is used instead of the individual power supply 30Ak of the electromagnet power supply apparatus 42A, and power supplies other than the individual power supply 30Ak of the electromagnet power supply apparatus 42A are used as they are (described above). Reassignment method (2)).

  The above operation is performed as follows in FIGS. First, as described above, the control circuit 33 takes in the state information (state signal) related to the operation state of each individual power supply by the signal input means of the control unit 41 (not shown), and the power failure check processing ( In step 110), it is confirmed whether or not a failure has occurred in the individual power supply based on the state information. In this example, since the individual power supply 30Ak of the electromagnet power supply 42A is out of order, it is determined that there is a failure, and in the power reassignment process (step 111) based on the failure information, the individual power supply 30Ak of the electromagnet power supply 42A. Instead, the corresponding individual power supply 30Bk of the electromagnet power supply 42B is assigned, and the assignment of power supplies other than the individual power supply 30Ak of the electromagnet power supply 42A is left as it is. When the power supply is reassigned in this way, the electromagnet power supply 42A is in an empty state. Therefore, for the power supplies other than the individual power supply 30Ak of the electromagnet power supply 42A, the process immediately proceeds to the A side processing, as shown in FIG. Operation parameter acquisition processing (step 71), course selection processing (step 72), switching state determination processing (step 73), initialization and excitation current setting processing (step 74) are executed. On the other hand, for the individual power supply 30Bk of the electromagnet power supply 42B, since the electromagnet power supply 42B is in use, initialization and current are used until the use of the electromagnet power supply 42B is completed, that is, using the electromagnet power supply 42B. Until the irradiation of the treatment room related to the course electromagnet subjected to the setting process is completed, the process does not proceed to the B-side process and waits.

  In addition, when the individual power supply 30Ak fails after entering the A-side process, such as when the individual power supply 30Ak fails during execution of the initialization operation of step 74 after the course selection process of step 72 is performed once. The A-side process is terminated, and the process returns to the power re-allocation process in step 111 to re-allocate the power as described above. Also in this case, the power supply other than the individual power supply 30Ak of the electromagnet power supply 42A immediately shifts to A-side processing, and the electromagnet power supply 42B is in use for the individual power supply 30Bk of the electromagnet power supply 42B. Therefore, the process does not shift to the B-side process until the use of the electromagnet power supply 42B is completed. In the A-side process, the operation parameters acquired in the operation parameter acquisition / setting process in step 71 before the power failure may be utilized as they are, and the course selection process in step 72 and subsequent steps may be performed.

  By controlling in this way, even if a failure occurs in the individual power supply of each electromagnet power supply device, the operation can be continued with a minimum influence.

  As described above, according to the present embodiment, it is possible to shorten the course switching time, shorten the treatment time, and improve the treatment efficiency.

  In addition, the number of electromagnet power supplies can be reduced and the particle beam therapy system can be simplified as compared with the case where all the course electromagnet groups are provided with power supplies on a one-to-one basis.

  In addition, the introduction of the home appliance particle beam into the intended treatment room irradiation apparatus can be ensured, and safety can be maintained.

  Also, in the unlikely event that one of the power supplies of the electromagnet power supply devices 42A and 42B fails, the electromagnet power supply apparatus with no power supply failure is used for backup, so the treatment time in this embodiment cannot be shortened. The treatment can be continued in each treatment room in the same manner as the particle beam treatment system disclosed in JP-A-2004-264781. By generating the first flag information and the second flag information, the electromagnet power supply apparatus in the standby state can be reliably grasped, and the electromagnet power supply apparatus used during the standby operation process can be easily identified.

  In the above embodiment, the two electromagnet power supply devices 42A and 42B are provided for the five treatment rooms 2A to 2E. However, the number of electromagnet power supply devices may be three or more as long as the number is less than the number of treatment rooms. . In this case, the course selection process may be performed so that the power supply groups of all the electromagnet power supply devices are connected to the coarse electromagnet group in order, or a part of the electromagnet power supply device may be used exclusively for the backup power supply. In addition, when two electromagnet power supply devices 42A and 42B are used, the number of treatment rooms may be three or more. In short, if the number of electromagnet power supply devices is smaller than the number of treatment rooms, the effect produced in this embodiment can be obtained. Further, depending on the equipment configuration, one large treatment room may have a plurality of beam courses. In this case as well, the effect of the present embodiment can be obtained by defining, as a treatment room, an area that matches each beam course in the treatment room.

  The particle beam therapy system which is the 2nd Embodiment of this invention is demonstrated using FIG.8 and FIG.9. In the present embodiment, a part of a plurality of treatment rooms is provided with a scanning type irradiation apparatus. In FIG. 8, the same components as those shown in FIG. 1 are given the same reference numerals, and in FIG. 9, the same components as those shown in FIG.

  In FIG. 8, irradiation devices 15AC, 15AD, 15AE arranged in treatment rooms 2C, 2D, 2E are scanning type irradiation devices, and irradiation devices 15A, 15B, 16 arranged in treatment rooms 2A, 2B, 3 are For example, a double scatterer type irradiation device (a wobbler type irradiation device may be used). Each of the scanning irradiation devices 15AC, 15AD, and 15AE includes a pair of scanning electromagnets (scanning electromagnet group) for scanning a thin ion beam in the affected area. These scanning electromagnets are electromagnets unique to the treatment rooms 2C to 2E, and are included in each course electromagnet group. An example of scanning irradiation of an ion beam is described in Japanese Patent No. 3518270.

  The control device 40A includes a control unit 41A, electromagnet power supply devices 42A and 42B (electromagnet power supply groups A and B) and load switching devices 43A and 43B for the respective electromagnet groups of the second beam transport systems 5A to 5E, and an irradiation device 15AC. Scanning electromagnet power supply devices 47A and 47B (scanning electromagnet power supply groups A and B) and scanning load switching devices 48A and 48B for the scanning electromagnet groups provided in 15AD and 15AE, respectively. Each power source included in the scanning electromagnet power supply 47A is referred to as a scanning electromagnet power supply group A, and each power supply included in the scanning electromagnet power supply 47B is referred to as a scanning electromagnet power supply group B. The electromagnet power supply devices 47A and 47B are for exciting the scanning electromagnet groups of the irradiation devices 15AC, 15AD, and 15AE, and include power supply groups corresponding to the scanning electromagnet groups of the irradiation devices 15AC, 15AD, and 15AE, respectively. Yes.

  Each of the scanning load switching devices 48A and 48B is switched to one scanning electromagnet group selected from the irradiation devices 15AC, 15AD, and 15AE according to a switching command based on a course selection command (described later). It is for switching to connect. Each of the scanning load switching devices 48A and 48B includes a switching device group (including a matching switching device having an auxiliary relay and a contactor) corresponding to each scanning electromagnet group of the irradiation devices 15AC, 15AD, and 15AE. Hereinafter, the switch group of the scanning load switching device 48A is referred to as a scanning load switching device group A, and the switching device group of the scanning load switching device 48B is referred to as a scanning load switching device group B.

  As shown in FIG. 9, the control unit 41A includes a control circuit 33A, a first come first service (FCFS) circuit 35, a storage device 32A, a waiting queue circuit 34, and a course selection state determination circuit 36A. In the drawing, as in FIG. 2, the solid line indicates the flow of the actual operation processing, and the broken line indicates the flow of the standby operation processing. In FIG. 9, for convenience of explanation, the load switching devices 43 </ b> A and 43 </ b> B and the scanning load switching devices 48 </ b> A and 48 </ b> B are representatively shown as one of the switch groups.

  As in the first embodiment, the first-arrival determination circuit 35 of the control unit 41A selects treatment rooms that perform treatment in the first-come-first-served order of the treatment room preparation completion signals 51 from the treatment rooms 2A to 2E, 3, and the first-come-first-served basis The treatment room number is output to the waiting queue circuit 34. When the treatment room is any one of the treatment rooms 2C, 2D, and 2E including the irradiation devices 15AC, 15AD, and 15AE, the control circuit 33A controls the irradiation device related to the treatment room in which the scanning electromagnet power supply group A or B is selected. The scanning load switch group A or B is switched so as to be connected to the scanning electromagnet group. For example, when the treatment room selected first is the treatment room 2C and the subsequent treatment room (the next treatment room selected) is the treatment room 2E, the scanning electromagnet power supply group A is applied to the treatment room 2C. The scanning load switch group A is switched so as to be connected to the 15AC scanning electromagnet group, and the scanning load switch group B is switched so as to connect the scanning electromagnet power supply group B to the scanning electromagnet group of the irradiation device 15AE related to the treatment room 2E. . In addition, the control circuit 33A performs the above-described A-side processing, confirms that the switching by the scanning load switch group A is completed, and then controls the scanning electromagnet power supply group A to scan the irradiation device 15AC. Initialization of each scanning magnet in the electromagnet group and excitation current setting processing (step 74) are performed. When the treatment in the treatment room 2C is being performed, the control circuit 33A performs the standby operation process in the B-side process described above and confirms that the switching by the scanning load switch group B has been completed, and then scans. The electromagnet power supply group B is controlled to perform initialization and excitation current setting processing (step 84) of each scanning electromagnet of the scanning electromagnet group included in the irradiation device 15AE. The initialization and excitation current setting processing (step 74) for each electromagnet of the course electromagnet group (excluding the scanning electromagnet group) related to the treatment room 2C is performed by the electromagnet power supply device 42A and the load switching device 43A. Done with. In the course electromagnet group (excluding the scanning electromagnet group) related to the treatment room 2E, initialization and excitation current setting processing (step 84) by standby operation processing for each electromagnet are also performed in the same manner as in the first embodiment. This is performed using the switching device 43B. The control circuit 33A includes a switching process of the switching electromagnet 6E in order to guide the ion beam to the irradiation device 15AE in the treatment room 2E in the B-side process after the irradiation of the ion beam in the treatment room 2C is completed. Actual operation processing such as initialization of each corresponding electromagnet in the partial electromagnet group and excitation current setting processing (step 86) is performed.

  Similarly to the electromagnet power supply devices 42A and 42B, the scanning electromagnet power supply devices 47A and 47B monitor the operating states of the respective power supplies included in the scanning electromagnet power supply groups A and B, respectively, and output the state information as status signals. The control circuit 33A takes in a status signal of each power source of the scanning electromagnet power supply devices 47A and 47B via a signal input means (not shown) of the control unit 41A, and the scanning electromagnet power source device 47A, It is confirmed whether any one of the power supplies of 47B has failed. If there is no power supply failure, the power allocation information from the standby queue circuit 34 (electromagnet power allocation means) is validated, and the A side processing or B side The process proceeds (step 110). On the other hand, if one of the power supplies of the scanning electromagnet power supply devices 47A and 47B is out of order, the power allocation information from the standby matrix circuit 34 is invalidated, the power is reassigned, and the A side processing or B side The process proceeds (step 111). In this case, there are two methods (1) and (2) described above as methods for reassigning power. In the A side processing and the B side processing, the scanning load switching device 48A or 48B is controlled based on the result of the reallocation.

  Further, the control circuit 33A takes in the status signals of the power supplies of the scanning electromagnet power supply devices 47A and 47B even after entering the A side processing or the B side processing, and based on the status information, the control circuit 33A of the scanning electromagnet power supply devices 47A and 47B. It is confirmed whether any of the power supplies has failed (step S112 or 113), and the process proceeds to the next process only when there is no power supply failure. And the process proceeds to the power reallocation process (step 111). In this case, there are two methods (1) and (2) as described above.

  The course selection state determination circuit 36A determines whether or not the switching of the load switch groups A and B is completed based on the switching state signal from the load switching devices 43A and 43B, and the treatment rooms 2C to 2E are selected. If there is, the switching state signals from the scanning load switching devices 48A and 48B determine whether or not the switching of the scanning load switch groups A and B has been completed, and the determination result is output to the control circuit 33A. . The storage device 32A stores operation parameters for creating an excitation current command. The created excitation current command includes an excitation current command for the scanning electromagnet group.

  Note that the control circuit 33A reassigns the power supply to the electromagnet power supply devices 42A and 42B in the same manner as in the first embodiment, and there is no power supply failure if any of those power supplies has failed. It has a function of using the electromagnet power supply for backup.

  In the present embodiment, the control circuit 33A performs the standby operation process and the actual operation process for the scanning electromagnet group when one of the treatment rooms 2C to 2E is selected. In the standby operation process, a course selection command and a current command are created based on the power supply group allocation information from the standby matrix circuit 34, and a switching command corresponding to the course selection command is output to the scanning load switching device 48A (or 48B). Then, the scanning load switch group A (or B) is switched. Further, after confirming that the switching of the scanning load switch group A (or B) has been completed based on the determination information of the course selection state determination circuit 36A, the operation parameters (excitations) related to the corresponding treatment room are stored from the storage device 32A. Current setting value) is read out to generate an excitation current command, and this excitation current command is output to the scanning electromagnet power supply 47A (or 47B). As a result, the scanning electromagnet group connected to the scanning electromagnet power supply group A (or B) is excited by the scanning load switch group A (or B), and initialization of these electromagnet groups and excitation current setting processing are performed.

  In the actual operation process in the A-side process (or B-side process), the common part electromagnet group (the electromagnet group of the first beam transport system 4 and the electromagnet group of the synchrotron 12) is initialized and the current setting process is performed. The irradiation process is performed after waiting for the irradiation start signal. In this irradiation process, an excitation current setting process for each pair of scanning electromagnets is performed to scan the ion beam in the affected area. Irradiation of the ion beam to the patient in the actual operation process is started after waiting for the determination result of the irradiation permission after the initialization of the coarse electromagnet group (including the scanning electromagnet group) and the excitation current setting process are completed.

  Further, as described above, the control circuit 33A determines whether any one of the power supplies of the scanning electromagnet power supply devices 47A and 47B has failed both before and after entering the A-side process or the B-side process. If there is a failure, the power supply is reassigned, and a scanning electromagnet power supply device with no power supply failure is used for backup.

  In the present embodiment configured as described above, as in the first embodiment, the course selection process for connecting the scanning electromagnet group to the power supply group in advance as standby operation can be performed, and accordingly, the treatment time is reduced accordingly. The treatment efficiency can be improved by shortening.

  Further, in order to obtain the same effect of shortening the treatment time, since two sets of scanning electromagnet power supply groups are sufficient as compared with the case where three sets of scanning electromagnet power supply groups are prepared corresponding to the number of scanning electromagnet groups, scanning is performed. The number of electromagnet power supplies can be reduced, and the configuration of the particle beam therapy system can be further simplified.

  Further, after confirming that the course selection processing is completed by the course selection state determination circuit 36A, initialization of each electromagnet of the course electromagnet group and the scanning electromagnet group and excitation current setting processing are performed. Thereafter, ion beam scanning irradiation is performed in the corresponding treatment room. For this reason, ion beam irradiation can be performed reliably in the intended treatment room, and safety can be maintained.

  In the event that one of the electromagnet power supplies 42A and 42B fails, an electromagnet power supply that does not include the failed power supply can be used as a backup, and any one of the scanning electromagnet power supplies 47A and 47B can be used. Even if the power supply of the scanner fails, the scanning electromagnet power supply apparatus that does not include the failed power supply can be used as a backup, so that the treatment rooms 2C, 2D, and 2E including the scanning irradiation apparatuses 15AC, 15AD, and 15AE are included. Treatment can be continued in any treatment room.

  In this embodiment, the electromagnet power supply devices 42A and 42B and the scanning electromagnet power supply devices 47A and 47B are provided for the five treatment rooms 2A to 2E. If the number is less than the number of treatment rooms, the number of these electromagnet power supply devices is provided. It is good also as three or more. In this case, the course selection process may be performed so that the power supply groups of all the electromagnet power supply devices are connected to the coarse electromagnet group in order, or a part of the electromagnet power supply device may be used exclusively for the backup power supply. In addition, when the electromagnet power supply devices 42A and 42B and the scanning electromagnet power supply devices 48A and 48B are used, the number of treatment rooms may be three or more. In short, the number of electromagnet power supply apparatuses is more than the number of treatment rooms. If there are few, the effect of this embodiment can be acquired. Further, depending on the equipment configuration, one large treatment room may have a plurality of beam courses. In this case as well, the effect of the present embodiment can be obtained by defining, as a treatment room, an area that matches each beam course in the treatment room.

  In the present invention, since the backup control means is provided as described above, it is possible to continue the operation with the minimum influence even when the failure of the individual power supply of each electromagnet power supply device occurs. The degree of influence is as follows. When there are two electromagnet power supply devices, the effect of shortening the course switching time by the switching control means of the present invention cannot be expected, and the operation is the same as in the conventional operation. When there are three systems of electromagnet power supplies, the course switching time can be shortened by the switching control means of the present invention even under the same failure conditions.

1 is a conceptual diagram showing an overall schematic configuration of a particle beam therapy system according to a first embodiment of the present invention. It is a functional block diagram which shows the detail of the processing function of the control part in 1st Embodiment. It is a figure which shows the detail of the production | generation function of the switching state signal of a load switching apparatus, and the determination processing function of a course selection state determination circuit. It is a flowchart which shows the processing function of a control circuit. It is a time chart explaining operation | movement of this embodiment system. It is a time chart explaining operation | movement of a conventional system. It is a block diagram which shows the driving | operation form when one of the separate power supplies of an electromagnet power supply device fails. It is a conceptual diagram which shows the whole schematic structure of the particle beam therapy system by the 2nd Embodiment of this invention. It is a functional block diagram which shows the detail of the processing function of the control part in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Charged particle beam generator 2A-E, 3 Treatment room 4 1st beam transport system 5A-5E 2nd beam transport system 6A-6E Switching electromagnet 7A-7F, 8 Shutter 9, 13, 18, 19B-19G, 22A- 22E, 24A-24E Quadrupole electromagnet 10, 14, 17, 21A-21E, 23A-23E, 25A-25E, 26A-26E Bending electromagnet 11 Pre-stage accelerator 12 Synchrotron 15A-15E, 15AC, 15AD, 15AE, 16 Irradiation device 33 Control circuit 35 First-arrival determination circuit 32, 32A Storage device 34 Standby matrix circuit (electromagnet power allocation means)
36 Course selection state determination circuit (switching state determination means)
37A to 37E Course selection completion determination unit 38A to 38E Continuity determination unit 40 Control device 41 Control units 42A and 42B Electromagnet power supply devices 43A, 43B, 48A and 48B Load switching device 44A Contactor group 44A1 to 44An Contactor 45A Auxiliary relay group 45A1 to 45An Auxiliary relay 47A, 47B Scanning magnet power supply 61, 62A, 62B, 62C, 62D, 62E Beam path 70 Free state confirmation processing 71, 81 Operation parameter acquisition processing 72, 82 Course selection processing (switching control means)
73, 83 Switching state determination processing (switching state determination means)
74, 84 Initialization and excitation current setting processing (initialization and current setting means)
75, 85 Irradiation permission determination processing (irradiation control means)
76, 86 Common part electromagnet group initialization and excitation current setting processing (irradiation control means)
77, 87 Operator irradiation operation determination processing (irradiation control means)
78,88 Irradiation processing (irradiation control means)
79, 89 Irradiation completion determination processing 80, 90 Standby course determination processing 110 Power supply failure confirmation processing (backup control means)
111 Power reallocation processing (backup control means)
112, 113 Power failure confirmation processing (backup control means)

Claims (20)

A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the first beam transport system connected to the charged particle beam generator and a branch from the first beam transport system. In the particle beam therapy system having a plurality of second beam transport systems connected to each of the irradiation devices, each of the plurality of second beam transport systems including an electromagnet group including a plurality of electromagnets,
At least two electromagnet power supplies each having a power supply group corresponding to the electromagnet group;
Provided for each of the electromagnet power supply devices, each having a switch group corresponding to the electromagnet group, and supplying the corresponding power supply group of the electromagnet power supply device to one selected treatment room among the plurality of treatment rooms At least two load switching devices that switch to connect to the electromagnet group of the second beam transport system involved;
The power supply group of one of the at least two electromagnet power supplies is connected to one second beam transport system related to a first treatment room that performs irradiation of a charged particle beam among the plurality of treatment rooms. The power supply group of another one of the electromagnet power supply devices connected to the electromagnet group and the second beam transport system of the other second beam transport system related to the second treatment room that performs irradiation of the charged particle beam next to the first treatment room. Switching control means for controlling the at least two load switching devices to be connected to an electromagnet group;
When one of the power supplies in each of the power supply groups of the at least two electromagnet power supply devices fails, the control of the load switching device by the switching control means is invalidated, and at least the failed power supply portion with respect to the failed power supply portion A particle beam therapy system, comprising: backup control means for controlling the at least two load switching devices so as to connect a power source group of another electromagnet power supply device not including the electromagnet to the corresponding electromagnet. A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the first beam transport system connected to the charged particle beam generator and a branch from the first beam transport system. In the particle beam therapy system having a plurality of second beam transport systems connected to each of the irradiation devices, each of the plurality of second beam transport systems including an electromagnet group including a plurality of electromagnets,
At least two electromagnet power supplies each having a power supply group corresponding to the electromagnet group;
Provided for each of the electromagnet power supply devices, each having a switch group corresponding to the electromagnet group, and supplying the corresponding power supply group of the electromagnet power supply device to one selected treatment room among the plurality of treatment rooms At least two load switching devices that switch to connect to the electromagnet group of the second beam transport system involved;
The power supply group of one of the at least two electromagnet power supplies is connected to one second beam transport system related to a first treatment room that performs irradiation of a charged particle beam among the plurality of treatment rooms. The power supply group of another one of the electromagnet power supply devices connected to the electromagnet group and the second beam transport system of the other second beam transport system related to the second treatment room that performs irradiation of the charged particle beam next to the first treatment room. Switching control means for controlling the at least two load switching devices to be connected to an electromagnet group;
When the first power supply in any one of the power supply groups of the at least two electromagnet power supply devices fails, the control of the load switching device by the switching control means is invalidated, and the first of the electromagnet power supply apparatus including the first power supply is disabled. A power supply other than the power supply is connected to a corresponding electromagnet of the electromagnet group of the second beam transport system related to the treatment room that performs irradiation of the charged particle beam at that time, and another electromagnet power supply apparatus that does not include the first power supply At least the second power source corresponding to the first power source of the power source group is connected to the corresponding electromagnet of the electromagnet group of the second beam transport system related to the treatment room that performs irradiation of the charged particle beam at that time. A particle beam therapy system comprising backup control means for controlling two load switching devices.   The switching control means is a switching operation of the switch group included in one load switching device that connects the power source group of the other one electromagnet power supply device to the electromagnet group of the other second beam transport system. The charged particle beam emitted from the charged particle beam generator is guided to the one second beam transport system, and the charged particle beam is guided to the other second beam transport system. The particle beam therapy system according to claim 1, wherein the particle beam therapy system is performed when the state is not set.   Which of the at least two electromagnet power supplies is associated with the electromagnet group of the second beam transport system related to the treatment room corresponding to the irradiation preparation completion signal generated among the plurality of treatment rooms. 3. An electromagnet power allocating unit for determining whether to allocate, wherein the switching control unit controls the at least two load switching devices based on a command from the electromagnet power allocating unit. The described particle beam therapy system. When the switching control means controls the at least two load switching devices so as to connect the power source group of the other one electromagnet power source device to the electromagnet group of the second beam transport system related to the second treatment room, Switching state determination means for determining whether the connection is completed for all electromagnets of the electromagnet group;
When the determination of the switching state determination means is affirmed, an initialization and current setting means for outputting a current command to the other one of the electromagnet power supply devices and initializing the electromagnet group and setting an exciting current is further provided. The particle beam therapy system according to claim 1 or 2, further comprising:   6. The particle beam therapy system according to claim 5, wherein the switching state determination unit further determines whether the electromagnet group is an electromagnet group related to a preselected treatment room.   When the switching control means connects the power supply group of the other one of the electromagnet power supply devices to the electromagnet group of the other second beam transport system, the charged particle beam emitted from the charged particle beam generating means is the one When guided to the second beam transport system, after the introduction of the charged particle beam to the one second beam transport system is stopped, the charged particle beam guided to the other second beam transport system is charged. 3. The particle beam therapy system according to claim 1, further comprising irradiation control means for emitting from the particle beam generating means.   The irradiation control means moves to the one second beam transport system when the switching control means connects the power supply group of the other one electromagnet power supply device to the electromagnet group of the other second beam transport system. 8. The particle beam therapy system according to claim 7, wherein the electromagnet group of the other second beam transport system is in a standby operation until the introduction of the charged particle beam is stopped.   3. The particle beam therapy system according to claim 1, wherein there are three or more second beam transport systems and two electromagnet power supply devices. A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the particle beam therapy system, wherein the plurality of irradiation devices include a plurality of scanning irradiation devices having a scanning electromagnet group,
At least two electromagnet power supplies each having a power supply group corresponding to the scanning electromagnet group;
At least two load switching devices provided for each of the electromagnet power supply devices, each having a switch group corresponding to the scanning electromagnet group, and the power supply group of the corresponding electromagnet power supply device being the plurality of scanning irradiation devices A load switching device for switching to connect to the scanning electromagnet group of one of the selected scanning irradiation devices;
When the scanning irradiation apparatus into which the charged particle beam is introduced among the plurality of scanning irradiation apparatuses is the first scanning irradiation apparatus, the power supply group of one electromagnet power supply apparatus among the at least two electromagnet power supply apparatuses is set to the first scanning irradiation apparatus. When the scanning irradiation device connected to the scanning electromagnet group of the scanning irradiation device and introducing the charged particle beam next to the first scanning irradiation device is the second scanning irradiation device, the other of the at least two electromagnet power supply devices Switching control means for controlling the at least two load switching devices so as to connect the power source group of the one electromagnet power source device to the scanning electromagnet group of the second scanning irradiation device;
When any power source in each power source group of the at least two electromagnet power source devices fails, the control of the load switching device by the switching control unit is invalidated, and at least the failed power source portion A particle beam therapy system, comprising: backup control means for controlling the at least two load switching devices so as to connect a power source group of another electromagnet power supply device not including a power source to a corresponding scanning electromagnet. A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the particle beam therapy system, wherein the plurality of irradiation devices include a plurality of scanning irradiation devices having a scanning electromagnet group,
At least two electromagnet power supplies each having a power supply group corresponding to the scanning electromagnet group;
At least two load switching devices provided for each of the electromagnet power supply devices, each having a switch group corresponding to the scanning electromagnet group, and the power supply group of the corresponding electromagnet power supply device being the plurality of scanning irradiation devices A load switching device for switching to connect to the scanning electromagnet group of one of the selected scanning irradiation devices;
When the scanning irradiation apparatus into which the charged particle beam is introduced among the plurality of scanning irradiation apparatuses is the first scanning irradiation apparatus, the power supply group of one electromagnet power supply apparatus among the at least two electromagnet power supply apparatuses is set to the first scanning irradiation apparatus. When the scanning irradiation device connected to the scanning electromagnet group of the scanning irradiation device and introducing the charged particle beam next to the first scanning irradiation device is the second scanning irradiation device, the other of the at least two electromagnet power supply devices Switching control means for controlling the at least two load switching devices so as to connect the power source group of the one electromagnet power source device to the scanning electromagnet group of the second scanning irradiation device;
When the first power supply in any one of the power supply groups of the at least two electromagnet power supply devices fails, the control of the load switching device by the switching control means is invalidated, and the first of the electromagnet power supply apparatus including the first power supply is disabled. A power supply other than the power supply is connected to a corresponding scanning electromagnet of the scanning electromagnet group of the scanning irradiation apparatus into which the charged particle beam is introduced at that time, and the first power supply group of the other electromagnet power supply apparatus not including the first power supply is connected. Backup control for controlling the at least two second load switching devices to connect the second power source corresponding to one power source to the corresponding scanning electromagnet of the scanning electromagnet group of the scanning irradiation apparatus into which the charged particle beam is introduced at that time And a particle beam therapy system. A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the light source, and a control unit. The beam transport system includes a first beam transport system connected to the charged particle beam generator, and the first beam transport. A particle beam branched from a system and having a plurality of second beam transport systems connected to each of the irradiation devices, wherein each of the plurality of second beam transport systems includes an electromagnet group including a plurality of electromagnets In the beam course switching method of the treatment system,
The controller is
A power supply group of one electromagnet power supply device among at least two electromagnet power supply devices each having a power supply group corresponding to the electromagnet group is used as a first treatment room that performs irradiation of a charged particle beam among the plurality of treatment rooms. Connected to one electromagnet group of the second beam transport system concerned, and another power source group of the other electromagnet power supply device related to the second treatment room that performs irradiation of the charged particle beam next to the first treatment room A first procedure of connecting to the electromagnet group of said second beam transport system;
When any power supply in each power supply group of the at least two electromagnet power supply devices fails, the connection processing of the power supply group by the first procedure is invalidated, and at least the failed power supply is A beam course switching method comprising: performing a second procedure of connecting a power supply group of another electromagnet power supply device not included to a corresponding electromagnet. A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the light source, and a control unit. The beam transport system includes a first beam transport system connected to the charged particle beam generator, and the first beam transport. A particle beam branched from a system and having a plurality of second beam transport systems connected to each of the irradiation devices, wherein each of the plurality of second beam transport systems includes an electromagnet group including a plurality of electromagnets In the beam course switching method of the treatment system,
The controller is
The power supply group of one electromagnet power supply device among at least two electromagnet power supply devices each having a power supply group corresponding to the electromagnet group is used as a first treatment room that performs irradiation of a charged particle beam among the plurality of treatment rooms. Connected to one electromagnet group of the second beam transport system concerned, and another power source group of the other electromagnet power supply device related to the second treatment room that performs irradiation of the charged particle beam next to the first treatment room A first procedure of connecting to the electromagnet group of said second beam transport system;
When the first power supply in any one of the power supply groups of the at least two electromagnet power supply devices fails, the connection processing of the power supply group by the first procedure is invalidated, and the first power supply of the electromagnet power supply apparatus including the first power supply A power source other than the above is connected to a corresponding electromagnet of the electromagnet group of the second beam transport system related to the treatment room which performs irradiation of the charged particle beam at that time, and other electromagnet power source devices not including the first power source A second procedure for connecting a second power source corresponding to the first power source of the power source group to a corresponding electromagnet of the electromagnet group of the second beam transport system related to a treatment room that performs irradiation of a charged particle beam at that time; The beam course switching method characterized by performing . The controller is
When the power supply group of the other one of the electromagnet power supply devices is connected to the electromagnet group of the second beam transport system related to the second treatment room by the first procedure, all the electromagnets included in the electromagnet group are connected. When the determination according to the third procedure and the determination by the third procedure is affirmed, a current command is output to the power supply group of the other one of the electromagnet power supply devices, and the initial setting of the electromagnet group 14. The beam course switching method according to claim 12, further comprising executing a fourth step of performing the conversion and the excitation current setting. 15. The controller is
In the third procedure , when the power source group of the other one of the electromagnet power supply devices is connected to the electromagnet group of the second beam transport system related to the second treatment room by the first procedure, the electromagnet group further includes 15. The beam course switching method according to claim 14, wherein it is determined whether the electromagnet group is related to the selected treatment room. The controller is
When the power supply group of the other one of the electromagnet power supply devices is connected to the electromagnet group of the second beam transport system by the first procedure, the charged particle beam emitted from the charged particle beam generating means is the one second beam. When guided to the transport system, after the introduction of the charged particle beam to the one second beam transport system is stopped, the charged particle beam is generated to be guided to the other second beam transport system. The beam course switching method according to claim 12 or 13, further comprising executing a fifth procedure of emitting light from the means. The controller is
In the fifth procedure , when the power source group of the other one of the electromagnet power supply devices is connected to the electromagnet group of the other second beam transport system according to the first procedure, the one second beam transport system is moved to. 17. The beam course switching method according to claim 16, wherein the electromagnet group of the other second beam transport system is in a standby operation until the introduction of the charged particle beam is stopped. A charged particle beam generator for emitting a charged particle beam, a plurality of irradiation devices respectively installed in a plurality of treatment rooms, and the charged particle beam generator connected to the charged particle beam generator, and the charged particle beam generator to each of the irradiation devices A beam transport system for transporting the charged particle beam emitted from the first beam transport system connected to the charged particle beam generator and a branch from the first beam transport system. And a plurality of second beam transport systems connected to each of the irradiation devices, wherein each of the plurality of second beam transport systems includes an electromagnet group including a plurality of electromagnets. ,
At least two electromagnet power supplies each having a power supply group corresponding to the electromagnet group;
Provided for each of the electromagnet power supply devices, each having a switch group corresponding to the electromagnet group, and supplying the corresponding power supply group of the electromagnet power supply device to one selected treatment room among the plurality of treatment rooms At least two load switching devices that switch to connect to the electromagnet group of the second beam transport system involved;
When a first power source in one of the power supply groups of the at least two electromagnet power supply devices fails, a power source other than the first power source of the electromagnet power source device including the first power source is irradiated with a charged particle beam at that time. A second power source corresponding to the first power source of the power source group of another electromagnet power source device that does not include the first power source is connected to the corresponding electromagnet of the electromagnet group of the second beam transport system related to the treatment room to be performed. And backup control means for controlling the at least two load switching devices so as to be connected to corresponding electromagnets of the electromagnet group of the second beam transport system related to the treatment room that performs irradiation of the charged particle beam at that time. A particle beam therapy system. Which of the at least two electromagnet power supplies is associated with the electromagnet group of the second beam transport system related to the treatment room corresponding to the irradiation preparation completion signal generated among the plurality of treatment rooms. An electromagnet power source allocating means for determining whether to allocate,
The switching control means controls the at least two load switching devices based on a command from the electromagnet power allocation means,
The backup control unit is configured such that, based on state information of each power source included in each power supply group of the at least two electromagnet power supply devices, any power supply in each power supply group of the at least two electromagnet power supply devices fails. If no failure has occurred, the command by the electromagnet power allocation means is validated, and if a failure has occurred, the command by the electromagnet power allocation means is invalidated, and the fault 2. The power supply group is reassigned using a power supply group of another electromagnet power supply apparatus that does not include the power supply, and the at least two load switching devices are controlled based on a result of the reassignment. Or the particle beam therapy system of 2. After the switching control means controls the at least two load switching devices to connect the power supply group of the other one of the electromagnetic power supply devices to the electromagnet group of the second beam transport system related to the second treatment room, An initialization and current setting means for outputting a current command to the other one electromagnet power supply device, initializing the electromagnet group and setting an exciting current,
Charged particles emitted from the charged particle beam generating means after the initialization and current setting means outputs a current command to the other one of the electromagnet power supply devices, initializes the electromagnet group and sets the excitation current. When the beam is guided to the one second beam transport system, the charge to be guided to the other second beam transport system after the introduction of the charged particle beam to the one second beam transport system is stopped. Irradiation control means for emitting a particle beam from the charged particle beam generation means,
The backup control means further includes the at least 2 after the switching control means controls the at least two load switching devices until the emission control means emits a charged particle beam from the charged particle beam generation means. Based on the state information of each power source included in each power supply group of one electromagnet power supply device, it is confirmed whether any power supply in each power supply group of the at least two electromagnet power supply devices has failed. If it occurs, the control of the switching control means, initialization and current setting means is invalidated, and the power supply group is reassigned using the power supply group of the other electromagnet power supply apparatus not including the failed power supply. 20. The particle beam therapy system according to claim 19, wherein the at least two load switching devices are controlled based on an assignment result. .

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