KR101670017B1 - Neutron-ray capture therapy system - Google Patents

Neutron-ray capture therapy system Download PDF

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Publication number
KR101670017B1
KR101670017B1 KR1020150095797A KR20150095797A KR101670017B1 KR 101670017 B1 KR101670017 B1 KR 101670017B1 KR 1020150095797 A KR1020150095797 A KR 1020150095797A KR 20150095797 A KR20150095797 A KR 20150095797A KR 101670017 B1 KR101670017 B1 KR 101670017B1
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South Korea
Prior art keywords
treatment
cable
irradiation
chamber
concave groove
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KR1020150095797A
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Korean (ko)
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KR20160029647A (en
Inventor
이츠시 이이오
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스미도모쥬기가이고교 가부시키가이샤
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
    • A61N5/1069—Target adjustment, e.g. moving the patient support
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
    • A61N2005/109—Neutrons

Abstract

Provided is a neutron capture therapy system capable of reducing reliability of a control unit mounted with a semiconductor and improving reliability.
The neutron capture therapy system 1 includes an irradiation chamber 4A for irradiating a neutron beam to an object to be irradiated, an irradiation unit 8A for irradiating a neutron beam to the inside of the irradiation chamber 4A, A control unit 27 which is disposed outside the examination room 4A and has a semiconductor element and controls the operation of the treatment unit; a control unit 27 connected to the treatment unit 2, And a transmission cable for transmitting a signal between the treatment zone (2).

Description

Neutron-ray capture therapy system < RTI ID = 0.0 >

The present application claims priority based on Japanese Patent Application No. 2014-181294 filed on September 5, 2014. The entire contents of which are incorporated herein by reference.

The present invention relates to a neutron beam capture therapy system.

Patent Document 1 discloses a radiotherapy apparatus comprising a treatment room in which radiation therapy is performed, an irradiation nozzle for irradiating radiation in the treatment room, a preparation room for preparing a patient for treatment, Discloses a treatment facility. In the preparation room, positioning is performed so that the affected part of the patient lying on the treatment target coincides with the irradiation position of the radiation. Next, the patient is returned to the treatment room on the treatment table. Thereafter, based on the position determined in the preparation chamber, radiation is irradiated from the irradiation nozzle to the affected part of the patient.

Prior art literature

(Patent Literature)

Patent Document 1: JP-A-2007-289373

Electronic devices equipped with semiconductors are vulnerable to radiation, and if used under an environment in which radiation exists, there is a possibility of failure. If the control means equipped with a semiconductor is provided in the vicinity of the treatment table or in the vicinity of the treatment table, the control means may fail. Particularly, in the case of performing neutron capture therapy, the radiation dose inside the examination chamber is larger than that of other radiation therapy, and therefore, the effect on the electronic device on which the semiconductor is mounted is large. In the technique described in Patent Document 1, when the control means on which the semiconductor is mounted is provided on the treatment table, there is a possibility that the control means may fail.

An object of the present invention is to provide a neutron capture therapy system capable of reducing reliability of a control unit equipped with a semiconductor and improving reliability.

A neutron capture therapy system according to the present invention comprises an irradiation chamber for irradiating a neutron beam to an object to be irradiated, an irradiation unit for irradiating a neutron beam to the inside of the irradiation chamber, a treatment platform movable between the inside of the irradiation chamber and the outside of the irradiation chamber, A control unit disposed outside the examination room and having a semiconductor element for controlling the operation of the treatment unit and a transmission cable connected to the treatment unit for transmitting a signal between the control unit and the treatment unit.

In this neutron capture therapy system, a control unit is disposed outside the examination room, and a signal output from the control unit can be transmitted to the treatment zone using a transmission cable, so that it is not necessary to provide a control unit in the treatment zone. Because of this, since the control unit is not disposed inside the irradiation room in accordance with the movement of the treatment zone, the risk of the control unit being broken by radiation is reduced. Further, since the treatment cable is connected to the treatment cell, it is not necessary to connect the treatment cable to the treatment cell inside the treatment cell. Thereby, the work inside the inspection room can be reduced, and the amount of exposure of the operator can be reduced. In addition, since there is no need to provide a facility for connecting the treatment table and the transmission cable inside the examination room, it is not necessary to perform the maintenance of the connection facility. Thereby, it is not necessary for the operator to enter the inside of the inspection room for maintenance, and the amount of exposure of the operator can be reduced.

The neutron capture therapy system is provided on the floor surface on which the treatment table is moved so that the concave groove portion continuous between the inside of the examination chamber and the outside of the examination chamber and the concave groove portion are arranged in the direction in which the concave groove portion extends, Wherein the transmission cable is disposed in the recessed groove portion and the treatment table has a lifting portion for lifting the lid portion as the treatment table moves. According to the neutron capture therapy system of this configuration, since a continuous concave groove portion is provided between the inside of the examination chamber and the outside of the examination chamber on the floor surface on which the treatment band moves, and the transmission cable is disposed in the concave groove portion, The transmitting cable can be accommodated downward than the moving floor. Thereby, the transmission cable can be disposed at a position that does not disturb the movement of the treatment table. Further, since the concave groove portion is covered by the lid portion, the concave groove portion is not exposed on the floor surface, thereby reducing the risk of a person falling over the concave groove portion. Thus, the safety can be improved. Since the treatment zone has a lifting portion for lifting the lid portion according to the movement of the treatment table, the lid portion is lifted more than the floor surface, so that the transmission cable arranged in the recessed groove portion can be led out from the inside of the recessed groove portion to the outside have. As a result, the transmission cable connected to the treatment band is placed in the concave groove, the concave groove is covered by the lid part, and the lid part is lifted in accordance with the movement of the treatment table to withdraw the transmission cable in the concave groove above the floor surface, Can be connected.

The treatment zone may include a mount portion for mounting the object to be irradiated, a running vehicle capable of traveling on the floor surface, and a support block for supporting the placement portion on the running vehicle, and the lift portion may be provided inside the traveling carrier. Since the lifting portion is provided inside the traveling carriage of the treatment table, the lid portion can be lifted up inside the traveling carriage, and the transmission cable in the recessed groove portion can be led to the outside of the recessed groove portion and connected to the treatment table. In addition, since the lid is lifted in the area covered with the traveling cart, the lid can not be lifted outside the area covered by the traveling cart. As a result, the floor surface and the lid can be placed flat Thus, it is possible to reduce a concern that a person is caught by the foot.

The treatment section may include a guide section for drawing the transmission cable upward and introducing the transmission cable into the carriage, and the guide section may be arranged inside the carriage. As a result, the transmission cable arranged in the concave groove portion can be guided by the guide portion, and can be led out upward to change the direction in which the transmission cable extends, and to introduce the transmission cable into the inside of the traveling caravan. Further, since the guide portion is accommodated in the inside of the traveling carriage, the guide portion can be disposed at a position that does not interfere with the operation or passage of a person.

The neutron capture therapy system is provided with a shielding door capable of closing the entrance of the examination room through which the treatment band passes and shielding the radiation and a shielding block capable of closing the concave groove portion below the entrance of the examination room and shielding the radiation . According to the neutron capture therapy system of this configuration, the entrance of the examination room is closed by the door closed, and the concave groove is closed by the shielding block, thereby shielding the radiation and suppressing the transmission of the radiation to the outside of the examination room.

One end of the transmission cable is fixed to the control unit. The other end of the transmission cable is fixed to the treatment table. Inside the recessed groove, a portion between the one end and the other end of the transmission cable An intermediate fixing portion for fixing the intermediate portion to the concave groove portion may be provided and the intermediate fixing portion may be arranged outside the irradiation chamber. Thus, since the position of the transmission cable can be fixed, the position of the transmission cable is largely shifted or entangled with the movement of the treatment band. Further, the transmission cable can be easily folded and accommodated in the concave groove portion. For example, the transmission cable can be folded and arranged at the intermediate fixing portion in a state in which the treatment band is disposed at the farthest position from the examination room. Further, since the intermediate fixing portion is disposed outside the examination room, the folding position of the transmission cable can be disposed outside the examination room in a state where the treatment unit is disposed at a position most distant from the examination room (for example, a preparation room). Thereby, at the position corresponding to the entrance of the examination room, the transmission cable is not disposed in the recessed groove, and the shielding block can be disposed and closed at this position.

The neutron capture therapy system further includes a power supply unit disposed outside the examination room for supplying electric power with the semiconductor device and a feed cable connected to the treatment unit for transmitting electric power between the power supply unit and the treatment unit , And the feed cable is disposed together with the transmission cable. According to the neutron capture therapy system of this configuration, the feed cable connected to the treatment band can be wired together with the transmission cable to supply power to the treatment band. Further, the power supply unit may be disposed outside the examination room, and the power output from the power supply unit may be supplied to the treatment table using the power supply cable. Thereby, it is not necessary to provide a power supply unit for the treatment zone. That is, as the treatment zone is moved, the power supply unit is not disposed inside the irradiation chamber, so that the possibility that the power supply unit is broken by radiation is reduced.

In addition, the neutron capture therapy system of the present invention comprises an irradiation chamber for irradiating a neutron beam to an object to be irradiated, an irradiation unit for irradiating a neutron beam to the inside of the irradiation chamber, A power supply unit disposed outside the examination room for supplying electric power with the semiconductor element and a feed cable connected to the treatment unit and transmitting power between the power supply unit and the treatment unit.

In this neutron capture therapy system, since the power supply unit is disposed outside the examination room, and the power output from the power supply unit can be transmitted to the treatment zone using the feed cable, it is not necessary to provide the power supply unit for the treatment zone. Because of this, since the power supply portion is not disposed inside the irradiation room according to the movement of the treatment band, the possibility that the power supply portion is broken by the radiation is reduced. In addition, since the feed cable is connected to the treatment table, it is not necessary to connect the feed cable to the treatment table in the inside of the inspection chamber, thereby reducing the work inside the inspection chamber and reducing the amount of exposure by the operator. In addition, since there is no need to provide a facility for connecting the treatment stand and the feed cable inside the inspection room, it is not necessary to perform the maintenance of the connection facility. Thereby, it is not necessary for the operator to enter the inside of the inspection room for maintenance, and the amount of exposure of the operator can be reduced.

According to the present invention, it is possible to provide a neutron capture therapy system capable of reducing the possibility of failure of a control unit equipped with a semiconductor element and improving reliability.

According to the present invention, it is possible to provide a neutron capture therapy system capable of reducing the possibility of failure of a power supply unit mounting semiconductor devices and improving reliability.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram showing the arrangement of a neutron capture therapy system of an embodiment of the present invention.
2 is a block diagram showing a configuration of a neutron capture therapy system.
3 is a schematic diagram showing a neutron capture therapy system.
Fig. 4 is a diagram showing a neutron beam output part and its periphery. Fig.
5 is a schematic cross-sectional view showing a driving mechanism in a traveling carriage of a treatment zone.
6 is a sectional view taken along line VI-VI in Fig.
7 is a sectional view taken along line VII-VII in Fig.
8 is a perspective view showing a part of the running belt.
9 is a plan view showing the arrangement of the power supply / control mechanism.
10 is a cross-sectional view showing a power supply / control mechanism disposed under the floor of the preparation chamber and the communication chamber.
11 is a cross-sectional view showing a power supply / control mechanism disposed under the floor of the irradiation room and the communication room.
12 is a cross-sectional view showing a cable bare and a cable introduction duct disposed at the bottom of a traveling car.
13 is a sectional view showing a cover belt, a belt support plate and a cable bearing.
Fig. 14 is a cross-sectional view showing a cover belt lifting portion provided at the bottom portion of the running car.

Best Mode for Carrying Out the Invention Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or similar parts are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

First, the entire configuration of the neutron capture therapy system 1 will be described with reference to Figs. 1 to 3. Fig. The neutron capture therapy system 1 is a device for performing boron neutron capture therapy (BNCT). The neutron capture therapy is a treatment for treating cancer by irradiating a neutron beam to a patient (subject) to which boron ( 10 B) is administered.

The neutron capture therapy system 1 includes a treatment zone 2 used for restricting a patient and returning and treating a patient and a preparation room 3A for performing preparations such as restricting the patient to the treatment zone 2 , 3B), irradiation rooms (4A, 4B) for irradiating neutrons to the patient, and a neutron beam generating part (5) for generating neutron rays. In the neutron capture therapy system 1, a contact chamber 6A is provided between the preparation chamber 3A and the irradiation chamber 4A, and a contact chamber 6B is provided between the preparation chamber 3B and the irradiation chamber 4B. Lt; / RTI >

The neutron beam generating unit 5 includes an accelerator 7 for accelerating charged particles and a neutron beam output unit 8A and 8B for outputting a neutron beam from the charged particle beam P emitted from the accelerator 7 And a beam transport path 9 for transporting the charged particle beam P to the neutron beam output portions 8A and 8B. The neutron capture therapy system 1 has a charged particle generating chamber 5a having a Y shape in plan view and in which the accelerator 7 and the beam transport path 9 are disposed. The charged particle generating chamber 5a is a closed space enclosed by the shielding wall W made of concrete.

The accelerator 7 is, for example, a cyclotron and accelerates a charged particle (for example, both) to emit a charged particle beam P (for example, a quantum ray). The accelerator 7 has the ability to emit a charged particle beam P having a beam radius of 40 mm and a beam radius of 60 kw (= 30 MeV x 2 mA), for example.

The beam transport path 9 selectively discharges the charged particle beam P to either one of the neutron beam output portions 8A and 8B. The beam transport path 9 has a first transport section 10 connected to the accelerator 7. One end side of the first transportation section 10 is connected to the accelerator 7 and the other end side of the first transportation section 10 is connected to the beam direction switching device 11. [ The beam direction converter 11 functions as a branching portion for branching the charged particle beam P from which the accelerator 7 is emitted.

The beam direction converter (11) controls the traveling direction of the charged particle beam (P) using a switching electromagnet. The beam direction converter 11 is provided with a second transport section 12A for transporting the charged particle beam P to the neutron beam output section 8A and a second transport section 12B for transporting the charged particle beam P to the neutron beam output section 8B And a third transport section 12B for transporting the same. The neutron beam output section 8A is provided at the rear stage of the second transportation section 12A and the neutron beam output section 8B is provided at the rear stage of the third transportation section 12B.

It is also possible that the beam direction converter 11 guides the charged particle beam P to a beam dump (not shown) while deviating from the normal trajectory. The beam dump is used to check the output of the charged particle beam P before treatment. However, the neutron capture therapy system 1 may be configured not to include a beam dump.

Each of the first transportation section 10, the second transportation section 12A and the third transportation section 12B includes a beam adjustment section 13 for the charged particle beam P, The beam adjusting section 13 includes horizontal steering and horizontal and vertical steering for adjusting the axis of the charged particle beam P, quadrupole electromagnet for suppressing divergence of the charged particle beam P, And a four-directional slit for shaping of the light source. Each of the first transport section 10, the second transport section 12A and the third transport section 12B may be configured not to include the beam adjusting section 13. [

The second transport section 12A and the third transport section 12B may include a current monitor if necessary. The current monitor measures the current value (i.e., charge and irradiation dose rate) of the charged particle beam P irradiated on the neutron beam output portions 8A and 8B in real time. The second transport section 12A and the third transport section 12B may include a charged particle beam scanning section 14 (see Fig. 4) as required. The charged particle beam scanning section 14 scans the charged particle beam P to control irradiation of the charged particle beam P with respect to the target T (see FIG. 4). The charged particle beam scanning section 14 controls irradiation positions of the charged particle beam P with respect to the target T, for example.

4, the neutron beam output section 8A includes a target T for generating a neutron beam N, a moderator 15 for decelerating the neutron beam N, a shielding body 16, . The moderator 15 and the shield 16 constitute a moderator. Since the neutron beam output section 8A and the neutron beam output section 8B have the same configuration as each other, the neutron beam output section 8A will be described in this specification and the description of the neutron beam output section 8B will be omitted .

The target T is irradiated with the charged particle beam P to generate the neutron beam N. The target T is formed of, for example, beryllium Be, and has a circular shape with a diameter of 160 mm. The target is not limited to a plate shape (solid), but may be a liquid or other shape.

The moderator 15 decelerates the neutron beam N emitted from the target T. The neutron beam N decelerated by the moderator 15 and reduced to a predetermined energy is also called a therapeutic neutron beam. The moderator 15 may have a laminated structure in which, for example, a plurality of different materials are laminated. The material of the moderator 15 is appropriately selected according to various conditions such as the energy of the charged particle beam P and the like. For example, when a beryllium target is used as the target T and the output from the accelerator 7 (see Fig. 2) is a positive line of 30 MeV, the material of the moderator 15 may be lead, iron, Calcium fluoride may also be used. When a beryllium target is used as the target T and the output from the accelerator 7 is 11 MeV and the beryllium target is used as the target T, a heavy water (D 2 O ) or fluoride lead may be used as the material of the moderator 15. (Mixture of aluminum, aluminum fluoride, and lithium fluoride) is used as the material of the moderator 15 when the lithium target is used as the target T and the output from the accelerator 7 is 2.8 MeV. May be used. Iron or fluent material may be used as the material of the moderator 15 when the tungsten target is used as the target T and the output from the accelerator 7 is 50 MeV.

The shield 16 shields the neutron beam N and the radiation such as gamma rays generated by the generation of the neutron beam N from being emitted to the outside. At least a part of the shield 16 is buried in the wall W1 (see Fig. 1) interposed between the charged particle generating chamber 5a and the irradiation chamber 4A.

In the neutron beam output section 8A, the charged particle beam P is irradiated to the target T, and the neutron beam N is thereby generated. The generated neutron beam N is decelerated in the moderator 15. The neutron beam N emitted from the moderator 15 passes through the collimator 17 and is irradiated to the patient S on the treatment table 2. [ The neutron beam (N) contains a fast neutron beam, an extra neutron beam, and a thermally charged beam, and involves gamma rays. Among them, mainly the thermophilic charitable ray exerts an effective therapeutic effect by nuclear reaction with the boron administered to the tumor in the body of the patient (S). A part of the extra-neutron beam included in the beam of the neutron beam N is also decelerated in the body of the patient S and becomes the extra-neutron beam exhibiting the therapeutic effect. The extra neutron beam is a neutron beam with energy of 0.5 eV or less.

Here, in this specification, an XYZ coordinate system is set as follows (refer to Fig. 1, Fig. 4 to Fig. 7, Fig. 9 to Fig. 14) based on the emission direction of the neutron beam N.

X axis: an axis extending along the emission direction of the neutron beam N emitted from the neutron beam output section 8A

Y axis: an axis extending along a direction orthogonal to the X axis

Z axis: An axis extending along the vertical direction (vertical direction with respect to the floor surface F) with respect to the X axis and the Y axis

Next, the examination rooms 4A and 4B will be described. As shown in Figs. 1 and 2, the neutron capture therapy system 1 has two irradiation chambers 4A and 4B. The irradiation chamber 4A is disposed on an extension line extending in the direction in which the second transport section 12A extends. The irradiation chamber 4B is disposed on an extension line extending in the direction in which the third transport section 12B extends.

The neutron line N may also be taken out in a direction intersecting the direction in which the second transport section 12A or the third transport section 12B extends. In this case, the arrangement of the irradiation chamber 4A is not limited to the extension of the extending direction of the second transport section 12A, but may be a position corresponding to the take-out direction of the neutron beam N. The arrangement of the irradiation chamber 4B is not limited to the extension line extending in the extending direction of the third transportation section 12B but may be a position corresponding to the extraction direction of the neutron beam N. [ Since the examination room 4A and the examination room 4B have the same configuration, the examination room 4A will be described in this specification, and the explanation of the examination room 4B will be omitted.

The examination room 4A is a room where the patient S is placed in the room for irradiating the patient S with the neutron beam N. [ The size of the irradiation room 4A is, for example, 3.5 m wide × 5 m deep × 3 m high. The irradiation room 4A has a shielding space surrounded by the shielding wall W2. A door D1 is provided at an entrance of the examination room 4A. The entrance of the examination room 4A has a size allowing the treatment table 2 to pass therethrough.

As shown in Fig. 4, a cover (wall) 18 is provided on the surface of the shield 16 on the irradiation room 4A side. The cover 18 forms a part of the inner wall surface of the irradiation chamber 4A. The cover 18 is provided with a collimator mounting portion 18a serving as an entrance and exit of the neutron beam N. The collimator mounting portion 18a is an opening for fitting the collimator 17 therein.

The shielding wall W2 is, for example, a wall made of concrete having a thickness of 2 m or more, and suppresses transmission of radiation. The shield wall W2 prevents transmission of radiation from the inside of the irradiation room 4A to the outside. The shielding wall W2 is formed integrally with the shielding wall W1.

The door D1 is a door capable of closing the doorway of the irradiation room 4A. The door D1 is a closed door for suppressing the transmission of radiation. The door D1 is made of a material that can inhibit the transmission of radiation such as polyethylene, lead, or the like. The door D1 is opened and closed, for example, by applying a driving force to the rail surface provided on the floor surface F by a motor or the like. When the door D1 is opened, the treatment table 2 can move between the contact chamber 6A and the irradiation chamber 4A. When the door D1 is closed, the treatment table 2 can not move between the contact chamber 6A and the irradiation chamber 4A. Further, at the time of closing the door D1, the transmission of the radiation through the entrance of the irradiation room 4A is prevented.

Since the door D1 is a heavy object, a high torque motor, a speed reducer, and the like are used as the mechanism for driving the door D1. The door D1 may have a function of informing an operator of entering / exiting the inspection room 4A. For example, the door D1 is closed in a state where the treatment table 2 is placed in the room of the examination room 4A, thereby confirming the withdrawal of the operator from the examination room 4A.

Next, the preparation chamber 3A will be described. The preparation chamber 3A is a chamber for performing a work necessary for irradiating the neutron beam N to the patient S in the irradiation chamber 4A. The preparation chamber 3A is disposed apart from the irradiation chamber 4A with the contact chamber 6A therebetween in the Y axis direction. Since the preparation chamber 3A and the preparation chamber 3B have the same configuration, the preparation chamber 3A will be described in this specification, and the description of the preparation chamber 3B will be omitted.

In the preparation chamber 3A, for example, the restraint of the patient S to the treatment table 2 and the alignment of the collimator 17 and the patient S are performed. Therefore, the preparation chamber 3A has a size such that the operator can easily perform preparation work around the treatment table 2 accommodated in the room.

A wall W3 interrupting the preparation chamber 3A and the irradiation chamber 4A is provided between the preparation chamber 3A and the irradiation chamber 4A in a region where the connection chamber 6A is not formed. The thickness of the wall W3 is, for example, 3.2 m. That is, the preparation chamber 3A and the irradiation chamber 4A are separated by 3.2 m along the Y-axis direction.

A door D2 is provided at an entrance of the preparation chamber 3A. The entrance of the preparation chamber 3A communicates with the preparation chamber 3A and the communication chamber 6A. The door D2 is a door that can close the entrance of the preparation chamber 3A, and is a door closet that suppresses the transmission of radiation. The door D2 is made of a material that can inhibit the transmission of radiation such as polyethylene, lead and the like. The door D2 is opened and closed by, for example, applying a driving force to the rail surface provided on the floor surface F by a motor or the like. When the door D2 is opened, the treatment table 2 can be moved between the preparation chamber 3A and the contact chamber 6A. At the time of closing the door D2, the treatment table 2 can not move between the preparation chamber 3A and the contact chamber 6A. When the door D2 is closed, the radiation of the radiation through the entrance of the preparation chamber 3A is prevented. As the mechanism for driving the door D2, a high torque motor, a speed reducer, or the like is used.

The contact chamber 6A is a chamber for moving the treatment table 2 in a state in which the patient S is constrained by the connection between the preparation chamber 3A and the irradiation chamber 4A. The communication chamber 6A is formed linearly along the Y-axis direction. The contact chamber 6A has a width allowing the treatment table 2 to pass therethrough. Further, the contact chamber 6A has a height at which the operator can walk and walk. The size of the contact chamber 6A is, for example, 1.5 m wide x 3.2 m deep x 2.0 m high. The communication chamber 6B communicates between the preparation chamber 3B and the irradiation chamber 4B and has the same configuration as the communication chamber 6A. Therefore, the description of the communication chamber 6B is omitted in this specification.

The neutron capture therapy system 1 has trajectories 19A and 19B for traveling the treatment table 2 between the preparation chambers 3A and 3B and the irradiation chambers 4A and 4B. Next, the orbit 19A will be described. The orbit 19A is provided from the inside of the preparation chamber 3A to the inside of the irradiation chamber 4A through the contact chamber 6A.

The trajectory 19A includes a pair of guide rails 20 for guiding the movement of the treatment table 2 and a pair of guide rails 20 for accommodating the pair of guide rails 20, And a pair of support members 22 disposed on both sides of the guide rail 20 in the running concave groove 21.

The running concave groove portion 21 is formed so as to be pushed downward from the floor surface F. [ A pair of running concave groove portions 21 are arranged apart from each other in the X-axis direction and extend along the Y-axis direction. The pair of running concave grooves 21 has a linear shape in plan view.

A pair of guide rails 20 are respectively disposed in the running concave groove 21 and extend along the Y-axis direction. The pair of guide rails have a straight line shape in plan view. The guide rail 20 is fixed to the bottom of the running concave groove 21.

The guide rail 20 is engaged with a slider (rail engagement portion) 23 described later. The slider 23 moves along the guide rail 20. The pair of support members 22 has an L-shaped cross section (see Figs. 6 and 7). The pair of support members 22 have a straight line in plan view, and extend along the guide rails 20. The guide rails 20 and the pair of support members 22 accommodated in the running concave groove 21 are arranged lower than the floor surface so as not to protrude upward from the floor surface. The difference in the vertical direction between the floor surface, the guide rail 20 and the pair of support members 22 is approximately the same as the thickness of the traveling belt BT1 described later.

A gap is formed between the guide rail 20 and the pair of support members 22 so as to allow the slider 23 to pass therethrough in the X-axis direction.

The neutron capture therapy system 1 includes a management chamber 24 as shown in Figs. 1 and 2. The management room 24 is a room for managing the whole process performed by using the neutron capture therapy system 1. [ The control room 24 is provided with a control device 25 for operating the neutron beam generating section 5 and a monitoring device 26 for monitoring the inside of the irradiation chambers 4A and 4B. The treatment room control section 27 is provided in the management room 24 for controlling the operation of the treatment area 2. [

The management chamber 24 is disposed between the preparation chamber 3A and the preparation chamber 3B so as to be adjacent to the two preparation chambers 3A and 3B. The management chamber 24 is adjacent to the preparation chamber 3A at one corner and adjacent to the preparation chamber 3B at the other corner. Between the management chamber 24 and the preparation chamber 3A, a window 28A is disposed so that the room of the preparation chamber 3A can be seen with the naked eye. Between the management chamber 24 and the preparation chamber 3B, a window 28B is disposed so that the room of the preparation chamber 3B can be seen with the naked eye.

The monitoring device 26 is connected to, for example, a camera 29 provided in a room of the examination room 4A or 4B. The monitoring device 26 can display an image photographed by the camera 29 with an image display section.

At least one administrator can enter the management room 24. The administrator can manage the entire process in the neutron capture therapy system 1 using the control device 25, the monitoring device 26, and the treatment unit 27. [

For example, an administrator who has entered the management room 24 visually confirms the preparatory work situation in the preparation rooms 3A and 3B from the inside of the management room 24. The manager who has entered the management room 24 operates the control device 25 to set the charged particle beam P to the target T corresponding to the irradiation room 4A to be irradiated with the neutron beam N, And controls the beam transport path 9 to irradiate the beam. The manager who entered the management room 24 controls the control device 25 to start and stop the irradiation of the neutron beam N. [

Various preparations (for example, PET examination, administration of boron ( 10B ), etc.) are performed on the patient S before entering the preparation chambers 3A and 3B in the neutron capture therapy. Therefore, the process of this advance preparation may also be managed in the management room 24. In this case, the management room 24 manages the entire process of neutron capture therapy including irradiation treatment by the neutron capture therapy system 1. [

In addition, the administrator can control the movement of the treatment zone 2 by using the treatment-based control unit 27. [ The treatment unit control unit 27 can be provided with a circuit board having semiconductor elements to control the movement start and stop positions of the treatment unit 2. [

In addition, the treatment unit control unit 27 is provided with a power supply circuit for supplying power to the treatment unit 2. The power supply circuit has a semiconductor element, for example, regulates the voltage and frequency of power supplied to the treatment table 2.

Next, the treatment zone 2 will be described. The treatment table 2 holds the patient S in a lying state and restrains the patient S such that the patient S maintains a predetermined posture. The treatment table 2 moves from the preparation chamber 3A to the irradiation chamber 4A while restraining the posture of the patient S. As shown in Fig. 4, the treatment table 2 includes a traveling cart 30 running on the floor surface F, a top plate (placement portion) 31 for placing the patient S, And a support table 32 for relatively moving the top plate 31 relative to the traveling car 30 and for supporting the top plate 31 on the traveling car 30. [ The treatment zone 2 has a collimator 17 for defining the irradiation range of the neutron beam N and a collimator fixing unit 33 for fixing the collimator 17 to the support base 32.

4 and 5, the traveling carriage 30 includes a pair of driving portions 34 for driving the traveling carriage 30 along the pair of guide rails 20, And a driving source (35) for supplying power to one side. A pair of the drive portions 34 are provided corresponding to the pair of guide rails 20, respectively. 5, the driving unit 34 includes a slider 23, a traveling belt BT1, a traveling belt pressing roller 36, a traveling belt lifting roller 37, a traveling belt tension roller 38). The traveling belt pressing roller 36, the traveling belt lifting roller 37 and the traveling belt tension roller 38 are supported by the traveling carriage 30 and rotate about a rotation axis extending in the X axis direction It is possible.

The slider (23) is slidable along the guide rail (20). The slider 23 together with the guide rail 20 constitutes a linear bearing (linear guide). The slider 23 is fixed to the lower surface 30a of the traveling carriage 30 as shown in Figs. Specifically, the slider 23 protrudes downward from the lower surface 30a of the traveling carriage 30 and is disposed in the running concave groove 21. The traveling carriage 30 is guided by the guide rail 20 and the slider 23 in the traveling direction.

The running belt BT1 is a so-called toothed belt and has flexibility. One surface in the thickness direction of the running belt BT1 is a flat surface, and is disposed upward (see Fig. 5). As shown in Fig. 8, on the flat surface side of the traveling belt BT1, a plurality of wires WE are disposed. The wire WE extends along the longitudinal direction of the traveling belt BT1. A plurality of wires WE are arranged in the width direction of the traveling belt BT1. The other surface of the running belt BT1 is an uneven surface in which irregularities are arranged in the longitudinal direction of the running belt BT1, and is disposed downward (see Fig. 5).

The running belt BT1 extends along the trajectories 19A and 19B in the Y-axis direction as shown in Fig.

7, the running belt BT1 is disposed in the running concave groove portion 21 and covers the upper surface of the guide rail 20 and the upper surface of the support member 22. As shown in Fig. The lower surface of the running belt BT1 is disposed so as to face the upper surface of the guide rail 20 and the upper surface of the support member 22. [

One end of the running belt BT1 is fixed to one end of the running concave groove 21. The other end of the running belt BT1 is fixed to the other end of the running concave groove 21. The width of the running belt BT1 is set to be substantially equal to the width of the running concave groove 21 or slightly smaller than the width of the running concave groove 21. The width of the running belt BT1 may be set to, for example, 8 times or less the thickness of the belt.

As shown in Fig. 5, the traveling belt pressing rollers 36 are disposed on the front side and the rear side, respectively, in the traveling direction of the traveling bogie 30. As shown in Fig. The lower surface of the driving belt pressing roller 36 is arranged so as to form a gap with the floor surface F as shown in Figs. The running belt pressing roller 36 is in contact with the upper surface of the running belt BT1. A gap is formed between the driving belt pressing roller 36 and the floor surface F and a portion of the driving belt BT1 pressed by the driving belt pressing roller 36 and the guide rail 20).

5, the pair of traveling belt lifting rollers 37 are disposed in the traveling direction of the traveling brakes 30 so as to be adjacent to the traveling belt pressing rollers 36, 36, respectively. The traveling belt lifting roller 37 is located above the traveling belt pressing roller 36. The traveling belt lifting roller 37 is rotatably mounted on the traveling carriage 30. [ The traveling belt lifting roller 37 is a pinching pulley having a surface on which concavities and convexities are arranged in the circumferential direction. The running belt lifting roller 37 comes into contact with the lower surface of the running belt BT1 to partially lift the running belt BT1. One of the pair of traveling belt lifting rollers 37 disposed on the front and rear in the traveling direction of the traveling truck 30 is connected to the driving source 35 and is rotationally driven by the driving source 35.

The traveling belt tension roller 38 is disposed between the pair of traveling belt lifting rollers 37 in the traveling direction of the traveling carriage 30. [ The lower surface of the traveling belt tension roller 38 is disposed below the upper surface of the pair of traveling belt lifting rollers 37. [ The traveling belt tension roller 38 contacts the upper surface of the traveling belt BT1 with its lower surface pressed against the upper surface of the traveling belt lifting roller 37 by the traveling belt BT1. As described above, by pushing the traveling belt BT1 downward, an appropriate tension is applied to the traveling belt BT1 so that the traveling belt BT1 and the traveling belt lifting roller 37 are engaged with each other.

One of the traveling belt lifting rollers 37 is rotationally driven in the traveling carriage 30 and the traveling belt lifting roller 37 is engaged with the traveling belt BT1 to rotate the traveling belt BT1 Move along. As a result, the traveling truck 30 moves in the direction in which the traveling belt BT1 extends. At this time, the other of the pair of traveling belt lifting rollers 37 is driven and rotated in accordance with the movement of the traveling carriage 30. [ Likewise, the pair of traveling belt pressing rollers 36 and the belt tension roller 38 for running run in the same direction as the traveling carriage 30 moves.

The portion of the traveling belt BT1 lifted by the traveling belt lifting roller 37 is located above the traveling concave groove portion 21 in the traveling carriage 30. [ On the other hand, in the traveling direction of the traveling carriage 30, a portion of the traveling belt BT1 which is outside the traveling belt pressing roller 36 and which is not lifted by the traveling belt lifting roller 37 (See Fig. 5). The lower surface (more specifically, the end of the convex portion of the running belt BT1) of the portion of the running belt BT1 which is not lifted by the running belt lifting roller 37 is located on the upper surface of the guide rail 20 And the upper surface of the support member 22. That is, the running belt BT1 is supported at three points, that is, the upper surface of the guide rail 20 and the upper surface of the pair of support members 22.

The top plate 31 is a flat plate showing a rectangular shape. The length in the longitudinal direction of the top plate 31 is set to a length (for example, about 2 m) that allows the patient S to squeeze the body. The top plate 31 is rotatably supported with respect to the support table 32 about a rotation axis extending in the Z-axis direction.

The support base 32 has, for example, an XY stage and is capable of moving the position of the top plate 31 in the X-axis direction and the Y-axis direction with respect to the traveling carriage 30. [ However, instead of the support base 32, a robot arm may be provided.

The collimator 17 regulates the irradiation range of the neutron beam N. The collimator 17 is provided with, for example, a circular opening 17a for defining an irradiation range. The neutron beam N passing through the opening 17a can be irradiated to the predetermined irradiation target in the patient S by keeping the posture of the patient S at the predetermined position with respect to the opening 17a .

The collimator 17 is, for example, a flat plate showing a rectangular image. The outer shape of the collimator 17 corresponds to the inner shape of the collimator mounting portion 18a in the irradiation chamber 4A. In this specification, a virtual axis passing through the center of the irradiation range defined by the collimator 17 (the center of the aperture 17a) is referred to as an irradiation central axis C. The irradiation central axis C extends in the upstream and downstream directions of the neutron beam N when the treatment band 2 is placed in the irradiation chambers 4A and 4B and the neutron beam N is irradiated.

The collimator fixing portion 33 is fixed to the upper surface of the base portion 32a of the support table 32. [ The collimator fixing portion 33 holds the collimator 17 at a predetermined position with respect to the base portion 32a. The collimator fixing part 33 has a horizontal piece 33a and an upstanding piece 33b and has a substantially L-shaped configuration. One end portion of the horizontal piece 33a is fixed to the base portion 32a and the other end portion is disposed at a position apart from the side surface 32b of the base portion 32a. One end of the standing piece 33b is fixed to the other end of the horizontal piece 33a and extends in the vertical direction. A collimator 17 is attached to the other end of the standing piece 33b.

On the treatment table (2), an electric motor for driving the XY stage and an electric motor for driving are mounted. As these electric motors, for example, stepping motors are used. To these stepping motors, power is supplied from the outside of the treatment table 2, and a control signal for driving the stepping motor is transmitted.

9 to 14, the neutron capture therapy system 1 is provided with a power supply / signal transmission mechanism 40 for supplying power to the treatment table 2 and transmitting a control signal. As shown in Figs. 12 to 14, the power supply / signal transmission mechanism 40 includes a power supply cable 41 for supplying power, a control cable (transmission cable) 42 for transmitting a control signal, (Cable holding portion) 43 for holding the power supply cable 41 and the control cable 42, a pit 44 for receiving the cable bear 43 under the floor, A cable inlet portion 45 for introducing the power supply cable 41 and the control cable 42 to the traveling carriage 30 and a cover portion 45 for covering the opening portion of the cover belt BT2, And a rim 46 for lifting up the cover BT2.

The power supply cable 41 is a cable for supplying power to the treatment table 2. One end 41a of the power supply cable 41 is connected to the power supply unit 47 disposed in the management room 24 and the other end 41b of the power supply cable 41, Is connected to the driving source 35 (see Fig. 5) of the treatment table 2. The other end of the power supply cable 41 may be connected to a power supply unit provided in the management room 24. The power supply unit 47 includes a power supply circuit for adjusting the power supplied to the driving source 35 of the treatment table 2, for example.

The control cable 42 is a cable for transmitting a control signal to the treatment unit 2. [ One end 42a of the control cable 42 is connected to the treatment unit control unit 27 disposed in the management room 24. The other end 42b of the control cable 42, Is connected to the driving source 35 of the treatment table 2. The control cable 42 may be connected to the various sensors of the treatment table 2 and the monitoring device 26 disposed in the management room 24. A plurality of control cables 42 connected to the treatment table 2 are provided. The one end side of the control cable 42 may be connected to a control unit arranged in addition to the management room 24. [ The treatment unit control unit 27 includes, for example, a drive circuit for driving the stepping motor which is the drive source 35 of the treatment unit 2. [

12 and 13, the cable bear 43 covers and holds the plurality of power supply cables 41 and the control cable 42 and guides the cables 41 and 42 to be bent . The cable bear 43 has a pair of chain portions 43a disposed on both sides of the cables 41 and 42 and a pair of chain portions 43a extending in the width direction of the cable bear 43 (Not shown). The plurality of chain portions 43a are connected in the longitudinal direction of the cable bear 43. The holding portion 43b is provided corresponding to the plurality of chain portions 43a and connects the pair of chain portions 43a opposed to each other in the width direction of the cable bear 43. [ The cable bear 43 has a plurality of stages of holding portions 43b in the thickness direction (Z-axis direction). The plurality of cables 41, 42 are respectively disposed between the holding portions 43b which are spaced apart in the thickness direction.

The pit 44 is a concave groove portion for accommodating the cable feed 43 for holding the power supply cable 41 and the control cable 42. The pit 44 is formed so as to be pitched downward from the floor surface F. The pit 44 is disposed at the center between a pair of running concave groove portions 21 for accommodating the guide rails 20 in the X axis direction and extends in the Y axis direction. The pit 44 extends from the inside of the preparation chamber 3A to the inside of the irradiation chamber 4A through the contact chamber 6A along the orbit 19A.

10 and 11, the fixed end 43c, which is one end side of the cable bearing 43, is fixed at a fixed point (intermediate fixing portion) 48 provided in the communication chamber 6A, It is fixed on the floor. The moving end 43d on the other end side of the cable bearing 43 is fixed to the bottom portion 30b of the traveling carriage 30 and is moved in the longitudinal direction Y of the pit 44 Axis direction).

10, one end of the feeder cable 41 and the control cable 42 is fixed to the end on the preparation chamber 3A side in the pit 44. As shown in Fig. The feeder cable 41 and the control cable 42 are arranged on the bottom surface of the pit 44 from the end on the preparation chamber 3A side to the fixed point 48 in the pit 44, (48) to the other end is held by the cable bearing (43), and the bent position is guided. The feeder cable 41 and the control cable 42 are suitably folded by the cable bear 43 and disposed in the vicinity of the floor surface F (below the floor surface F) in the pit 44 , And extends toward the end on the preparation chamber 3A side.

Fig. 10 shows a state in which the treatment table 2 is disposed in the preparation chamber 3A. In this state, the folding position KR of the cable bearing 43 is arranged in the vicinity of the fixed point 48 (on the irradiation room 4A side of the fixed point 48). As the treatment table 2 moves toward the irradiation room 4A, the folded position KR of the cable bearing 43 moves toward the irradiation room 4A.

Fig. 11 shows a state in which the treatment table 2 is disposed in the irradiation room 4A. In this state, the folding position KR by the cable bear 43 is located near the stop position G1 on the irradiation room side and near the movable end 43d. The stop position G1 on the irradiation room 4A side is a position corresponding to the irradiation center axis C in the running direction of the treatment table 2. [

The cover belt BT2 is a so-called toothed belt and has flexibility. One surface of the cover belt BT2 in the thickness direction is a flat surface, and is disposed upward. As shown in Fig. 8, on the flat surface side of the cover belt BT2, a plurality of wires WE are disposed. The wire WE extends along the longitudinal direction of the cover belt BT2. A plurality of wires WE are arranged in the width direction of the cover belt BT2. The other surface of the cover belt BT2 is an uneven surface in which irregularities are arranged in the longitudinal direction of the cover belt BT2, and is disposed downward.

As shown in Figs. 3 and 9, the cover belt BT2 extends along the trajectories 19A and 19B in the Y-axis direction.

The cover belt BT2 is disposed in the vicinity of the floor surface F in the pit 44, as shown in Fig. On the upper side of the pit 44, a pair of belt supporting plates 49 are provided. The pair of belt support plates 49 are arranged so as to protrude from the upper end of the side wall 44b of the pit 44 toward the center in the width direction (X axis direction) of the pit 44.

The pair of belt support plates 49 are disposed apart from each other in the X-axis direction to support both end portions in the width direction of the cover belt BT2 and support the power supply cable 41 and the control cable 42 And forms a gap for drawing out the upper side than the floor surface (F).

The pair of belt supporting plates 49 are supported from the lower side by the L-shaped steel 50 fixed to the upper end of the side wall 44b of the pit 44. The inner edge of the pair of belt support plates 49 is formed with a flange portion 49a protruding inward in the width direction. The upper surface of the belt support plate 49 is at a substantially same height position as the floor surface F. The flange portion 49a is formed at a position lower than the upper surface of the belt support plate 49. [ The difference in height between the upper surface of the belt support plate 49 and the flange portion 49a corresponds to the thickness of the cover belt BT2. The upper surface of the belt supporting plate 49 and the upper surface of the cover belt BT2 in the state in which the cover belt BT2 is supported by the flange 49a of the pair of belt supporting plates 49, Is formed at a substantially same height position as a flat surface.

The opening of the pit 44 is covered by the pair of belt supporting plates 49 and the cover belt BT2 in the entire length of the pit 44 in the longitudinal direction. One end of the cover belt BT2 is fixed to the end of the pit 44 on the preparation chamber 3A side and the other end of the cover belt BT2 is fixed to the end of the pit 44 on the side of the irradiation chamber 4A .

The rim portion 46 for covering the cover belt is provided on the traveling carriage 30 of the treatment table 2. As shown in Fig. 14, the rim 46 for lifting the cover belt includes a cover belt pressing roller 51 and a cover belt lifting roller 52. [ The cover belt pressing roller 51 and the cover belt lifting roller 52 are supported by the traveling carriage 30 so as to be rotatable about a rotation axis extending in the X axis direction.

The cover belt pressing rollers 51 are disposed on the front side and the rear side, respectively, in the traveling direction of the traveling carriage 30. Here, in the running direction, the irradiation chamber 4A side is the front side and the preparation chamber 3A side is the rear side. 14 shows the cover belt pressing roller 51 on the front side. A plurality of cover belt pressing rollers 51 are provided on the front side and the rear side, respectively. The lower surface of the roller 51 provided at the lowermost one of the plurality of cover belt pressing rollers 51 is arranged so as to form a gap with the floor surface F. [ The lower surface of the cover belt pressing roller 51 is in contact with the upper surface of the cover belt BT2 to regulate the position of the cover belt BT2 in the vertical direction. A clearance is generated between the cover belt BT2 and the flange portion 49a of the belt support plate at a position where the cover belt pressing roller 51 is in contact with the cover belt BT2. The roller 51 disposed inside the running direction of the plurality of cover belt pressing rollers 51 comes into contact with the upper surface of the cover belt BT2 at a position shifted upward from the lowermost point so that the cover belt BT2 is gentle The cover belt BT2 is pressed downward so as to be curved in curvature.

14, the pair of cover belt lifting rollers 52 are arranged so as to be adjacent to the cover belt pressing roller 51 so that the cover belt lifting roller 51 of the cover belt pressing roller 51 Respectively. The upper surface of the cover belt lifting roller 52 is located above the cover belt pressing roller 51. [ The cover belt lifting roller 52 is a pinching pulley having a surface on which concave and convex portions are arranged in the circumferential direction. The cover belt lifting roller 52 abuts against the lower surface of the cover belt BT2 to partially lift the cover belt BT2.

The cover belt pressing roller 51 and the cover belt lifting roller 52 are driven and rotated in accordance with the movement of the traveling carriage 30. [

The portion of the cover belt BT2 which is lifted by the cover belt lifting roller 52 is located above the floor surface F in the inside of the traveling carriage 30. [ On the other hand, the upper surface of the portion of the cover belt BT2 which is outside the cover belt pressing roller 51 and is not lifted by the cover belt lifting roller 52 in the running direction of the traveling carriage 30 And the floor surface F (see Fig. 14). The lower surface (more specifically, the end of the convex portion of the cover belt BT2) of the uncovered portion of the cover belt BT2 is in contact with the upper surface of the flange portion 49a of the pair of belt support plates 49 . That is, the cover belt BT2 is supported at two points of the flange portion 49a of the pair of belt support plates 49. [

The cable guiding portion (guiding portion) 45 shown in Figs. 12 and 14 is provided on the bottom portion 30b of the traveling bogie 30 of the treatment table 2, and in the traveling direction of the traveling bogie 30, And is disposed between a pair of cover belt lifting rollers 52. The cable introducing portion 45 draws the feeder cable 41 and the control cable 42 in the cable bear 43 upward and introduces the cable 45 into the traveling carriage 30. [ The cable introducing portion 45 includes a cable introducing duct 53 for taking out the feeder cable 41 and the control cable 42 disposed in the pit 44 upward and introducing the feeder cable 41 into the runway car 30, And a duct support portion 54 for supporting the introduction duct 53.

The cable introducing duct 53 is, for example, a tubular body having a rectangular cross section. The openings of the cable introducing ducts 53 face upward and downward. A flange 53a is provided at the upper end of the cable introducing duct 53 and a flange 53b is provided at the lower end of the cable introducing duct 53. [

The lower end flange 53b is disposed so as to protrude downward from the lower surface of the traveling carriage 30 and is inserted into the pit 44. [ As shown in Fig. 14, the moving end 43d of the cable bearing 43 is fixed to the flange 53b at the lower end.

The opening of the cable introducing duct 53 has a longer length in the Y-axis direction than a length in the X-axis direction. The length of the opening of the cable introducing duct 53 in the X axis direction is slightly narrower than the gap between the pair of belt supporting plates 49 (the distance between the flanges 49a) as shown in Fig. 12 . The size of the cable introduction duct 53 in the Y-axis direction is such that it does not contact the pair of cover belt lifting rollers 52.

The flange 53a on the upper end side of the cable introducing duct 53 is supported from both sides in the X axis direction by the duct supporting portion 54. [ The duct support portion 54 is formed to extend upward from the bottom surface of the traveling carriage 30 and fixes the flange 53a on the upper end side of the cable introduction duct 53 to the traveling carriage 30. [

The feeder cable 41 and the control cable 42 held by the cable bearer 43 are exposed to the outside from the moving end 43d of the cable bearer 43 and arranged in the Y axis direction, Passes through the cable introducing duct 53, is led out from the upper end opening, and is divided into two sides in the X-axis direction on the lower side of the cover belt BT2. The feeder cable 41 and the control cable 42 introduced into the traveling carriage 30 are connected to the driving source (stepping motor) 35 as described above.

10 and 11, the neutron capture therapy system 1 is provided with shielding blocks 55 and 56 capable of closing the pit 44. [ The shielding block 55 is disposed below the door D1 between the contact chamber 6A and the irradiation chamber 4A. The shielding block 56 is disposed below the door D2 between the communication chamber 6A and the preparation chamber 3A.

The shielding blocks 55 and 56 are made of a material that can inhibit transmission of radiation such as polyethylene, lead, or the like. The shielding blocks 55 and 56 are driven along guide rails extending in, for example, the X-axis direction, and protrude into the pit 44 to close the pit 44. The shielding blocks 55 and 56 are provided with a driving force by an electric motor or the like to be opened and closed.

Next, the flow of the neutron capture therapy using the neutron capture therapy system 1 will be described.

First, the patient S is subjected to predetermined preparations before entering the preparation chamber 3A (neutron capture therapy system 1). Next, the patient S and the worker enter the preparation chamber 3A, and the operator places the patient S on the top plate 31. Then, Next, the worker restrains the body of the patient S with respect to the top plate 31 by using the restraining opening. Next, the irradiation target in the patient S and the irradiation central axis C of the collimator 17 are aligned.

Next, the treatment table 2 is moved to the examination room 4A. At this time, the administrator of the management room 24 may determine whether or not the user can enter the examination room 4A. For example, the worker reports to the manager that the work in the preparation chamber 3A is completed. The manager who has received the report opens the door D2 blocking the preparation room 3A and the communication room 6A when it is judged that the entrance to the examination room 4A is possible. At this time, the shielding block 56 is left in the open state (the pit 44 is not closed by the shielding block 56), or the shielding block 56 is opened in accordance with the opening of the door D2, Lt; / RTI >

When the treatment table 2 is moved from the preparation chamber 3A into the communication chamber 6A, the door D2 is closed and the pit 44 is closed by the shielding block 56. [ After the door D2 is closed, the door D1 blocking the communication chamber 6A and the irradiation chamber 4A is opened. In accordance with the opening of the door D1, the shielding block 55 is opened. The order of opening and closing the doors D1 and D2 is not limited to this order. For example, the door D1 and the door D2 may be opened at the same time. However, after closing the door D1 and the door D2, the doors D1 and D2 are temporarily closed so that the state of movement of the treatment table 2 into the examination chamber 4A can be visually observed from the preparation chamber 3A. The door D2 may be opened.

When the treatment table 2 is moved from the communication chamber 6A into the irradiation chamber 4A, the collimator 17 is mounted on the collimator mounting portion 18a. Next, the entrance of the irradiation room 4A is closed by the door D1. Similarly, the pit 44 is closed below the door D1 by using the shielding block 55. [ Thereafter, when the manager operates the control device 25, the irradiation of the neutron beam N is started, and the patient S is treated. The irradiation time is, for example, about one hour. The situation of the patient S under treatment is captured by the camera 29 provided in the room of the examination room 4A. The image photographed by the camera 29 is reflected on the monitor of the monitoring device 26 in the management room 24. The manager uses the monitor to manage the situation of the patient S under treatment. When the abnormality is confirmed in the patient S being treated, the manager makes a judgment of stopping the investigation.

When the predetermined irradiation time has elapsed, the control device 25 automatically stops the irradiation of the neutron beam N. Next, the treatment table 2 is moved to the preparation chamber 3A. Next, the worker releases the fixation of the patient S by the restraint in the preparation chamber 3A, and guides the patient S to the outside of the preparation chamber 3A. Thus, the neutron capture therapy using the neutron capture therapy system 1 is completed.

In the neutron capture therapy system 1 of the present embodiment, a treatment unit 27 is disposed outside the irradiation rooms 4A and 4B, and the control signal output from the treatment unit control unit 27 is supplied to the control cable 42 To the treatment zone 2, so that the drive control of the treatment zone 2 can be performed. This makes it unnecessary to install the treatment unit 27 in the treatment zone 2 so that the treatment zone control unit 27 will be placed inside the irradiation zones 4A and 4B in accordance with the movement of the treatment zone 2 none. This reduces the possibility that the driving circuit of the treatment unit 27 is broken by the radiation. In addition, since the control cable 42 is connected to the treatment table 2, it is not necessary to connect the control cable 42 to the treatment table 2 in the irradiation chambers 4A and 4B. Thereby, the work inside the inspection chambers 4A and 4B can be reduced, and the amount of exposure of the operator can be reduced. It is not necessary to arrange facilities for connecting the treatment table 2 and the control cable 42 inside the irradiation chambers 4A and 4B and therefore it is not necessary to perform the maintenance of the connection equipment. Thereby, it is not necessary for the operator to enter the inside of the irradiation chambers 4A, 4B for maintenance, and the amount of exposure by the operator can be reduced.

In the neutron capture therapy system 1 of the present embodiment, the power supply unit 47 is disposed outside the irradiation chambers 4A and 4B, and the power output from the power supply unit 47 is supplied to the power supply cable 41 To the treatment table 2, so that the treatment table 2 can be driven. This eliminates the need to install the power supply 47 in the treatment table 2 so that the power supply 47 is not placed inside the irradiation chambers 4A and 4B as the treatment table 2 moves. This reduces the risk that the power supply circuit of the power supply unit 47 will fail due to radiation. Since the power supply cable 41 is connected to the treatment table 2, it is not necessary to connect the power supply cable 41 to the treatment table 2 within the irradiation chambers 4A and 4B. Thereby, the work inside the inspection chambers 4A and 4B can be reduced, and the amount of exposure of the operator can be reduced. It is not necessary to arrange facilities for connecting the treatment table 2 and the feeder cable 41 to the inside of the irradiation chambers 4A and 4B, and therefore it is not necessary to perform the maintenance of the connection equipment. Thereby, it is not necessary for the operator to enter the inside of the irradiation chambers 4A, 4B for maintenance, and the amount of exposure by the operator can be reduced.

According to the neutron capture therapy system 1, the floor surface F is provided with pits 44 continuous between the inside of the examination chambers 4A and 4B and the outside of the examination chambers 4A and 4B, The feeder cable 41 and the control cable 42 can be accommodated below the floor surface F because the feeder cable 41 and the control cable 42 are disposed in the pit 44. [ Thereby, the power supply cable 41 and the control cable 42 can be disposed at positions that do not interfere with the movement of the treatment table 2.

In the neutron capture therapy system 1, since the pit 44 is covered by the cover belt BT2 and the pair of belt supporting plates 49 on the outer side of the treatment table 2, F of the pit 44 is not exposed and the risk of the operator falling over the opening of the pit 44 is reduced. Thus, the safety can be improved. Since the treatment table 2 has the rim portion 46 for lifting the cover belt BT2 in accordance with the movement of the treatment table 2, the cover belt BT2 The power supply cable 41 and the control cable 42 disposed in the pit 44 can be led out from the inside of the pit 44 to the outside. The power supply cable 41 and the control cable 42 connected to the treatment table 2 are disposed in the pit 44 and the outer surface of the treatment table 2 is covered with the cover belt BT2, The cover belt BT2 is lifted in accordance with the movement of the treatment table 2 so that the power supply cable 41 and the control cable 42 in the pit 44 are pulled out above the floor surface F Can be connected to the treatment zone (2).

In the neutron capture therapy system 1, since the rim portion 46 for covering the cover belt is disposed inside the traveling carriage 30, the cover belt BT2 And the cover belt BT2 can not be lifted outside the area covered with the traveling carriage 30. [ Therefore, the upper surface of the cover belt BT2 and the floor surface F can be arranged flush with each other in a movable range of the person, thereby reducing the possibility that a person falls on the feet.

In the neutron capture therapy system 1, since the cable introducing portion 45 is disposed inside the traveling carriage 30, the cable introducing portion 45 is disposed at a position that does not interfere with human operation or passage The power supply cable 41 and the control cable 42 can be pulled up and introduced into the traveling carriage 30.

According to the neutron capture therapy system 1, since the entrance and exit of the examination chambers 4A and 4B can be closed by the door D1 and the pit 44 can be closed by the shielding block 55, 4B, 4B, and 4B, thereby suppressing transmission of radiation to the outside of the irradiation chambers 4A, 4B.

The present invention is not limited to the above-described embodiment, and various modifications are possible as long as they do not depart from the gist of the present invention.

In the above embodiment, the power supply cable 41 and the control cable 42 are disposed in the pit 44 provided on the floor, but the cables 41 and 42 may be disposed in areas other than under the floor.

In the above-described embodiment, the control signal is transmitted using the control cable 42, but the control signal may be partially transmitted through the wireless communication unit, for example. Alternatively, a control cable may be connected using a connector.

In the above embodiment, power is supplied to the treatment table 2 by using the power supply cable 41. However, for example, when the power storage device is mounted on the treatment table 2, Power may be supplied to the base 2.

In the above embodiment, the treatment unit 27 and the power supply unit 47 are disposed outside the irradiation rooms 4A and 4B. However, any one of the treatment unit control unit 27 and the electric power supply unit 47 May be arranged in the irradiation chambers 4A and 4B.

In the above embodiment, the cables 41 and 42 are held by the cable bear 43, but the cables 41 and 42 may not be held by the cable bear 43.

In the above embodiment, the cable introduction portion 45 is disposed inside the traveling carriage 30, but the cable introduction portion 45 may not be disposed inside the traveling carriage 30. For example, the cable guiding portion 45 may be arranged so as to protrude to the outside of the traveling carriage 30.

Although the rim portion 46 in which the cover belt is put in is disposed inside the traveling carriage 30 in the above embodiment, the rim portion 46 in which the cover belt is put is not disposed inside the traveling carriage 30 . For example, the rim portion 46 for covering the cover belt may be arranged so as to protrude to the outside of the traveling carriage 30.

1: Neutron capture therapy system
2: Treatment center
3A, 3B: preparation room
4A, 4B: Investigation room
5: Neutron beam generator
8A, 8B: Neutron wire output section (irradiation section)
27: Treatment treatment unit (control unit)
30: Driving car
31: Top plate (mounting part)
32: Support
41: Power supply cable
42: Control cable (transmission cable)
43: Cable Bear
44: Pits (concave grooves)
45: Cable introduction part (guide part)
46: Rim to cover belt
47: Power supply
55, 56: Shielding block
BT2: Cover belt (lid of long shape)
F: Floor surface

Claims (8)

An irradiation chamber for irradiating the neutron beam to the irradiated body,
An irradiation unit for irradiating a neutron beam inside the irradiation chamber,
A treatment table movable between the inside of the examination room and the outside of the examination room,
A control unit which is disposed outside the examination room and has a semiconductor element and controls an operation of the treatment zone;
A transmission cable connected to the treatment zone, for transmitting a signal between the control unit and the treatment zone,
A concave groove portion provided on the floor surface on which the treatment table is moved and continuing between the inside of the irradiation chamber and the outside of the irradiation chamber,
A concave groove portion extending in a direction of extending to cover the concave groove portion and having a flexible elongated lid portion,
The transmission cable is disposed in the concave groove portion,
Wherein the treatment zone has a lifting portion that lifts the lid portion as the treatment table moves. delete The method according to claim 1,
Wherein the treatment zone comprises a placement unit for placing the object on the floor, a traveling bogie capable of traveling on the floor surface, and a support base for supporting the placement unit on the traveling bogie,
Wherein the lifting portion is provided inside the traveling carriage. The method of claim 3,
Wherein the treatment section includes a guide section for drawing the transmission cable upward and introducing the transmission cable into the traveling carriage,
Wherein the guide portion is disposed inside the traveling carriage. The method according to any one of claims 1, 3, and 4,
A shielding door capable of closing the entrance of the examination room through which the treatment band passes, and shielding the radiation,
And a shielding block capable of closing the concave groove portion and shielding radiation from below the entrance of the irradiation room. The method according to any one of claims 1, 3, and 4,
Wherein one end side of the fixed end of the transmission cable is fixed to the control unit,
The other end side of the transmission cable is fixed to the treatment table,
An intermediate fixing portion for fixing an intermediate portion, which is a portion between the one end side and the other end side, of the transmission cable to the concave groove portion is provided in the concave groove portion,
Wherein the intermediate fixation portion is disposed outside the examination chamber. The method according to any one of claims 1, 3, and 4,
A power supply unit disposed outside the irradiation chamber and supplying electric power to the semiconductor device,
And a feed cable connected to the treatment unit for transmitting power between the power supply unit and the treatment unit,
Wherein the feed cable is disposed with the transmission cable. An irradiation chamber for irradiating the neutron beam to the irradiated body,
An irradiation unit for irradiating a neutron beam inside the irradiation chamber,
A treatment table movable between the inside of the examination room and the outside of the examination room,
A power supply unit disposed outside the irradiation chamber and supplying electric power to the semiconductor device,
A feed cable connected to the treatment unit, for transmitting power between the power supply unit and the treatment unit;
A concave groove portion provided on the floor surface on which the treatment table is moved and continuing between the inside of the irradiation chamber and the outside of the irradiation chamber,
A concave groove portion extending in a direction of extending to cover the concave groove portion and having a flexible elongated lid portion,
Wherein the feed cable is disposed in the concave groove portion,
Wherein the treatment zone has a lifting portion that lifts the lid portion as the treatment table moves.
KR1020150095797A 2014-09-05 2015-07-06 Neutron-ray capture therapy system KR101670017B1 (en)

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CN105435376A (en) 2016-03-30
CN105435376B (en) 2018-11-13

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