WO2015052766A1 - 放射線治療装置制御装置、放射線治療システム、放射線治療装置制御方法およびプログラム - Google Patents
放射線治療装置制御装置、放射線治療システム、放射線治療装置制御方法およびプログラム Download PDFInfo
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- WO2015052766A1 WO2015052766A1 PCT/JP2013/077311 JP2013077311W WO2015052766A1 WO 2015052766 A1 WO2015052766 A1 WO 2015052766A1 JP 2013077311 W JP2013077311 W JP 2013077311W WO 2015052766 A1 WO2015052766 A1 WO 2015052766A1
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- gantry
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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
- A61N5/1077—Beam delivery systems
- A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries
- A61N5/1082—Rotating beam systems with a specific mechanical construction, e.g. gantries having multiple beam rotation axes
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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
- A61N5/1077—Beam delivery systems
- A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries
-
- 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
Definitions
- the present invention relates to a radiation therapy apparatus control apparatus, a radiation therapy system, a radiation therapy apparatus control method, and a program.
- a radiation therapy apparatus in which a radiation irradiation apparatus (radiation source) is supported so as to be rotatable around an affected area.
- a radiation irradiation apparatus radiation source
- radiation can be irradiated from multiple directions toward the affected area.
- a radiation therapy apparatus that can rotate the rotation axis of the radiation irradiation apparatus.
- an O-ring supports a traveling gantry
- the traveling gantry supports a therapeutic radiation irradiation apparatus via a swing mechanism.
- the therapeutic radiation irradiation apparatus can be moved three-dimensionally by rotating the O-ring and the traveling gantry. Thereby, the said radiation irradiation apparatus for treatment can irradiate the affected part from various directions toward the affected part, and can reduce the radiation irradiation amount to the dangerous part more reliably.
- a radiotherapy apparatus capable of rotating the rotation axis of the radiation irradiation apparatus
- consideration may be required for the path of the radiation irradiation apparatus.
- a radiotherapy apparatus in which a radiation irradiation apparatus rotates around a couch lying on the patient's side, if the angle of the rotation axis of the radiation irradiation apparatus with respect to the longitudinal direction of the couch changes, the distance between the radiation therapy apparatus and the couch may change. .
- the path of the radiation irradiation apparatus may be blocked by the couch and the treatment plan may not be executed.
- the present invention provides a radiotherapy apparatus control apparatus, a radiotherapy system, a radiotherapy apparatus control method, and a program that can more easily ensure a path through which the radiotherapy apparatus can actually move.
- a radiotherapy apparatus control apparatus includes a gantry that supports a radiation irradiation apparatus so as to be rotatable around a first axis, and a gantry that is rotatable around a second axis that intersects the first axis.
- a radiotherapy apparatus controller for controlling a radiotherapy apparatus comprising a support ring, a movement path information storage unit for storing information on a movement path set in the radiation irradiation apparatus, and a rotation angle of the gantry Based on the rotation angle of the ring, the rotation speed of the gantry and the rotation speed of the ring are limited while the ratio of the rotation speed of the gantry and the rotation speed of the ring indicated in the information of the movement path is maintained.
- a control unit to be provided.
- a speed limit map storage unit for storing a speed limit map indicating a relationship between a rotation angle of the gantry and a rotation angle of the ring and a limit on the rotation speed of the gantry and the rotation speed of the ring;
- the rotation speed of the gantry and the rotation speed of the ring may be limited based on the speed limit map.
- An operation input unit that receives an operation input for instructing a moving speed of the radiation irradiation apparatus; and the control unit moves the movement based on the operation input, a rotation angle of the gantry, and a rotation angle of the ring.
- the rotation speed of the gantry and the rotation speed of the ring may be limited while maintaining the ratio between the rotation speed of the gantry and the rotation speed of the ring indicated in the path information.
- a radiotherapy system supports a gantry that supports a radiation irradiation device so as to be rotatable around a first axis, and supports the gantry so as to be rotatable around a second axis that intersects the first axis.
- a movement path information storage unit that stores information of a movement path set in the radiation irradiation apparatus, a rotation angle of the gantry and a rotation angle of the ring, the gantry indicated in the movement path information
- a control unit that limits the rotational speed of the gantry and the rotational speed of the ring while maintaining the ratio of the rotational speed of the ring and the rotational speed of the ring.
- the radiotherapy apparatus control apparatus including the movement path information storage unit that stores the information of the movement path set in the radiation irradiation apparatus rotates around the first axis.
- a radiation therapy apparatus control method for controlling a radiation therapy apparatus comprising: a gantry that supports the radiation irradiation apparatus, and a ring that supports the gantry so as to be rotatable about a second axis that intersects the first axis. Based on the rotation angle of the gantry and the rotation angle of the ring, while maintaining the ratio of the rotation speed of the gantry and the rotation speed of the ring indicated in the information of the movement path, A control step for limiting the rotational speed of the ring.
- a program includes a gantry that supports a radiation irradiation device so as to be rotatable around a first axis, and a ring that supports the gantry so as to be rotatable around a second axis that intersects the first axis.
- a radiotherapy apparatus control apparatus for controlling a radiotherapy apparatus comprising: a radiotherapy apparatus control apparatus including a movement path information storage unit that stores information on a movement path set in the radiation irradiation apparatus.
- the computer Based on the rotation angle of the gantry and the rotation angle of the ring, the computer maintains the ratio of the rotation speed of the gantry and the rotation speed of the ring indicated in the movement path information, and the rotation speed of the gantry and It is a program for executing a control step for limiting the rotational speed of the ring.
- radiotherapy apparatus control apparatus radiotherapy system, radiotherapy apparatus control method, and program, it is possible to more easily secure a path through which the radiotherapy apparatus can actually move.
- FIG. 1 It is a schematic block diagram which shows the apparatus structure of the radiotherapy apparatus in one Embodiment of this invention. It is a schematic block diagram which shows the function structure of the radiotherapy system in the embodiment. It is explanatory drawing which shows an example of the speed limit map which the speed limit map memory
- FIG. 1 is a schematic configuration diagram showing an apparatus configuration of a radiotherapy apparatus according to an embodiment of the present invention.
- the radiotherapy apparatus 30 includes a turning drive device 311, a ring 312, a gantry 313, a swing mechanism 321, an irradiation unit 330, and a couch 381.
- the irradiation unit 330 includes a radiation irradiation device 331 and a multi-leaf collimator (MLC) 332.
- MLC multi-leaf collimator
- the turning drive device 311 rotates the ring 312 while supporting the ring 312 on the base so as to be rotatable about the rotation axis A11.
- the rotation axis A11 is a vertical axis.
- the ring 312 is formed in a ring shape centered on the rotation axis A12, and supports the gantry 313 so as to be rotatable about the rotation axis A12.
- the rotation axis A12 is a horizontal axis (that is, an axis perpendicular to the vertical direction), and is orthogonal to the rotation axis A11 at the isocenter P11.
- the rotation axis A12 is fixed with respect to the ring 312.
- the rotation axis A12 rotates around the rotation axis A11 as the ring 312 rotates.
- the ring 312 rotates by itself so that the gantry 313 and the parts installed in the gantry 313 rotate integrally around the rotation axis A11.
- the ring 312 rotates the radiation irradiation device 331 around the rotation axis A11 by rotating itself.
- the gantry 313 is formed in a ring shape centered on the rotation axis A ⁇ b> 12, and is disposed inside the ring 312 so as to be concentric with the ring 312.
- the radiotherapy device main body 30 further includes a travel drive device (not shown), and the gantry 313 rotates around the rotation axis A12 with power from the travel drive device.
- the gantry 313 rotates by itself so that each part installed in the gantry 313 rotates integrally around the rotation axis A12.
- the gantry 313 rotates the radiation irradiation device 331 around the rotation axis A12 by rotating itself.
- the rotation axis A12 corresponds to an example of the first axis.
- the rotation axis A11 corresponds to an example of a second axis.
- the gantry 313 supports the radiation irradiation apparatus 331 so as to be rotatable around the first axis extending in the horizontal direction.
- the ring 312 supports the gantry 313 so as to be rotatable around a second axis extending in the vertical direction perpendicular to the first axis.
- the head swing mechanism 321 is fixed inside the ring of the gantry 313 and supports the irradiation unit 330 to the gantry 313.
- the head swing mechanism 321 rotates the irradiation unit 330 about the pan axis A21 and rotates the irradiation unit 330 about the tilt axis A22.
- the pan axis A21 is an axis parallel to the rotation axis A12 and is fixed to the gantry 313.
- the swing mechanism 321 rotates the irradiation unit 330 about the pan axis A21 to swing the irradiation unit 330 left and right with respect to the rotation axis A12 (thus, left and right with respect to the patient PT).
- the tilt axis A22 is an axis orthogonal to the pan axis A21 and is fixed to the gantry 313.
- the head swing mechanism 321 rotates the irradiation unit 330 about the tilt axis A22 to swing the irradiation unit 330 in the direction of the rotation axis A12 (and thus up and down with respect to the patient PT).
- the irradiation unit 330 irradiates the therapeutic radiation B11 having an irradiation field corresponding to the shape of the affected part. Since the radiation irradiation device 331 is supported by the gantry 313 via the swing mechanism 321, once the radiation irradiation device 331 is directed to the isocenter P ⁇ b> 11 by adjustment of the swing mechanism 321, the ring driving device 311 causes the ring 312 to rotate. Even if the gantry 313 is rotated by the traveling drive device, the therapeutic radiation B11 always passes through the isocenter P11.
- the radiation irradiation apparatus 331 can irradiate the therapeutic radiation B11 from various directions toward the isocenter P11 by rotating about the rotation axis A11 or the rotation axis A12.
- the multi-leaf collimator 332 shields a part of the therapeutic radiation B11, thereby matching the shape of the irradiation field when the therapeutic radiation B11 is irradiated to the patient to the shape of the affected part.
- the couch 381 is used when the patient PT lies down.
- FIG. 2 is a schematic block diagram showing a functional configuration of the radiation therapy system in the present embodiment.
- the radiation therapy system 1 includes a therapy planning device 10, a radiation therapy device control device 20, a radiation therapy device 30, and a communication line 90.
- the radiotherapy device control apparatus 20 includes a display unit 210, an operation input unit 220, a storage unit 230, a control unit 240, and a communication unit 290.
- the storage unit 230 includes a treatment plan storage unit 231 and a speed limit map storage unit 232.
- FIG. 2 shows a ring 312, a gantry 313, and a radiation irradiation device 331 among the components of the radiation therapy apparatus 30 shown in FIG. 1.
- the radiotherapy apparatus 30 includes a communication unit 390.
- the communication line 90 connects the treatment planning device 10, the communication unit 290 of the radiation therapy device control device 20, and the communication unit 390 of the radiation therapy device 30, and mediates communication between these devices.
- the treatment planning apparatus 10 generates a treatment plan in radiation therapy.
- the treatment plan generated by the treatment planning device 10 includes an instruction of the rotation speed for the radiation treatment device 30.
- the movement path of the radiation irradiation device 331 is indicated by an instruction of the rotation speed with respect to the gantry 313 and the ring 312.
- the treatment planning apparatus 10 generates a treatment plan for performing radiation irradiation using a dynamic wave arc.
- the dynamic wave arc here is a radiation irradiation method in which the radiation irradiation device 331 is continuously irradiated with radiation while the gantry 313 is continuously rotated, and at the same time, the ring 312 is also rotated.
- radiation can be continuously irradiated from various directions toward a specific site such as an affected part. Therefore, in the dynamic wave arc, it is possible to more reliably reduce the radiation dose to the dangerous part while efficiently performing radiation treatment by continuous irradiation.
- the treatment planning apparatus 10 includes a computer such as a personal computer (PC), for example.
- PC personal computer
- the radiation therapy apparatus control device 20 controls the radiation therapy apparatus 30 based on the treatment plan transmitted by the treatment planning apparatus 10. Specifically, the radiation therapy apparatus control device 20 generates a control signal for the radiation therapy apparatus 30 based on the treatment plan, and transmits the control signal to the radiation therapy apparatus 30.
- the radiotherapy apparatus control apparatus 20 includes a computer such as a personal computer, for example.
- the display unit 210 includes a display screen such as a liquid crystal panel, and displays various types of information. For example, the display unit 210 displays error information when an error occurs in the radiation therapy apparatus 30.
- the operation input unit 220 is configured to include an input device such as a keyboard and a mouse, for example, and receives an operation input by an operator of the radiotherapy system 1 (for example, a radiotherapy technician). For example, the operation input unit 220 accepts an operator operation that instructs an operator operation to instruct the start of radiation irradiation. In addition, the operation input unit 220 receives an operator operation instructing the start of the operation of the radiation therapy apparatus 30 for confirming the route of the radiation irradiation apparatus 331 prior to the radiation irradiation.
- the operator of the radiation therapy system 1 is simply referred to as “operator”.
- the storage unit 230 includes a storage device included in the radiation therapy apparatus control apparatus 20 and stores various types of information.
- the treatment plan storage unit 231 stores information on the movement route set in the radiation irradiation apparatus 331. Specifically, the movement route of the radiation irradiation device 331 is shown in the treatment plan generated by the treatment plan device 10, and the treatment plan storage unit 231 stores the treatment plan received by the communication unit 290 from the treatment plan device 10. To do.
- the speed limit map storage unit 232 stores a speed limit map in advance. The speed limit map stored in the speed limit map storage unit 232 indicates the relationship between the rotation angle of the gantry 313 and the rotation angle of the ring 312 and the restrictions on the rotation speed of the gantry 313 and the rotation speed of the ring 312.
- the control unit 240 controls each unit of the radiation therapy apparatus control device 20 to execute various functions.
- the control unit 240 is realized, for example, when a CPU (Central Processing Unit) included in the radiation therapy apparatus control apparatus 20 reads a program from a storage device included in the radiation therapy apparatus control apparatus 20.
- the control unit 240 generates a control signal for the radiotherapy device 30 according to the treatment plan from the treatment planning device 10.
- the control signal generated by the control unit 240 includes control information for the rotational speed of the gantry 313 and control information for the rotational speed of the ring 312.
- the control unit 240 limits the rotation speed of the gantry 313 and the rotation speed of the ring 312 based on the rotation angle of the gantry 313 and the rotation angle of the ring 312. Specifically, the control unit 240, based on the speed limit map stored in the speed limit map storage unit 232, in a region where the rotational speed of the gantry 313 and the rotational speed of the ring 312 are limited by the speed limit map. Limits are imposed on the rotational speed of 313 and the rotational speed of the ring 312.
- control unit 240 determines the rotational speed of the gantry 313 when at least one of the rotational speed of the gantry 313 and the rotational speed of the ring 312 in the treatment plan exceeds a limit value indicated in the speed limit map. And the rotational speed of the ring 312 is reduced below the rotational speed indicated in the treatment plan. At that time, the control unit 240 reduces the rotation speed of the gantry 313 and the rotation speed of the ring 312 while maintaining the ratio of the rotation speed of the gantry 313 and the rotation speed of the ring 312 indicated in the treatment plan. Thereby, the control part 240 can reduce the rotational speed of the gantry 313 and the rotational speed of the ring 312, without changing the movement path
- the communication unit 290 communicates with the treatment planning apparatus 10 and the radiation treatment apparatus 30 via the communication line 90.
- the communication unit 290 receives a treatment plan from the treatment planning apparatus 10.
- the communication unit 290 transmits a control signal for operating the gantry 313, the ring 312 and the like to the radiation therapy apparatus 30.
- the communication unit 290 receives state information of the radiation therapy apparatus 30 such as rotation angle information of the gantry 313 and rotation angle information of the ring 312 from the radiation therapy apparatus 30.
- the communication unit 390 communicates with the communication unit 290 of the radiation therapy apparatus control device 20.
- the communication unit 390 receives a control signal from the communication unit 290.
- the communication unit 390 transmits the state information of the radiation therapy apparatus 30 to the communication unit 290.
- FIG. 3 is an explanatory diagram illustrating an example of a speed limit map stored in the speed limit map storage unit 232.
- the speed limit map is shown in the form of a graph.
- the horizontal axis of the graph in FIG. 3 indicates the rotation angle of the gantry 313.
- the rotation angle of the gantry 313 when the radiation irradiation device 331 is at the highest position as shown in FIG. 1 is set to 0 degree (°), and the right rotation direction when viewed from the foot side of the patient PT is positive.
- the range for one rotation from 180 degrees to 180 degrees is shown on the horizontal axis.
- 3 represents the rotation angle of the ring 312.
- the rotation angle of the ring 312 when the rotation axis A12 is along the longitudinal direction of the couch 381 is 0 degrees
- the right rotation direction is positive when viewed from the top of the ring 312 and ⁇ 60 degrees.
- the range from to 60 degrees is shown on the vertical axis.
- a region R11 indicated by hatching is a region where the rotational speed of the gantry 313 and the rotational speed of the ring 312 are not limited.
- the region R12 is a region where the rotational speed of the gantry 313 and the rotational speed of the ring 312 are limited.
- the region R12 is a region other than the region R11.
- an area requiring attention for contact between the radiation irradiation device 331 and the couch 381 is an area where the rotational speed of the gantry 313 and the rotational speed of the ring 312 are limited.
- the rotation angle of the ring 312 and the gantry 313 Depending on the rotation angle, there is a possibility of contact between the radiation irradiation device 331 and the couch 381.
- the control unit 240 controls the radiation therapy apparatus 30 according to the speed limit map. For example, when the gantry 313 and the ring 312 rotate like the line L11, the control unit 240 does not limit the rotation speed of the gantry 313 and the ring 312 in the part of the line L12 and the part of the line L14. In this case, the control unit 240 generates a control signal for controlling the gantry 313 and the ring 312 according to the rotation speed of the gantry 313 and the rotation speed of the ring 312 in the treatment plan.
- the radiation therapy apparatus control device 20 limits the rotational speed of the gantry 313 and the ring 312. Specifically, the control unit 240 reduces the rotation speed more than the treatment plan when at least one of the rotation speed of the gantry 313 and the rotation speed of the ring 312 in the treatment plan is larger than the limit value. At that time, the control unit 240 reduces the rotation speed of the gantry 313 and the rotation speed of the ring 312 while maintaining the ratio of the rotation speed of the gantry 313 and the rotation speed of the ring 312 indicated in the treatment plan.
- the speed limit map stored in the speed limit map storage unit 232 is not limited to only indicating whether or not there is a rotational speed limit.
- the speed limit map storage unit 232 may store a speed limit map indicating the speed limit of the gantry 313 or the ring 312 in three stages of no speed limit / high limit speed / low limit speed.
- the speed limit map storage unit 232 stores a speed limit map indicating a limit value for the rotation speed of the gantry 313 and a limit value for the rotation speed of the ring 312 for each rotation angle of the gantry 313 and the rotation angle of the ring 312. May be.
- the speed limit map stored in the speed limit map storage unit 232 can be in various forms.
- the speed limit map storage unit 232 may store the speed limit map in the form of a table indicating the presence / absence or limit value of the rotation speed limit for each rotation angle of the ring 312 and the rotation angle of the gantry 313.
- the speed limit map storage unit 232 may store a function that outputs the presence or absence of a rotation speed limit or a limit value using the rotation angle of the ring 312 and the rotation angle of the gantry 313 as arguments.
- FIG. 4 is an explanatory diagram illustrating an example of a processing procedure in which the control unit 240 generates and transmits a control signal for the radiation therapy apparatus 30.
- the communication unit 290 receives the treatment plan from the treatment planning device 10 and the operation input unit 220 receives an operator operation instructing the start of radiation irradiation, the radiation therapy device control device 20 performs the processing in FIG.
- the control unit 240 first reads the treatment plan stored in the treatment plan storage unit 231, thereby acquiring rotational speed information of each of the gantry 313 and the ring 312 in the treatment plan (step S ⁇ b> 101).
- the control unit 240 acquires rotation angle information of each of the gantry 313 and the ring 312 (step S102).
- the control unit 240 acquires rotation angle information of each of the gantry 313 and the ring 312 that the communication unit 290 receives from the radiation therapy apparatus 30.
- control unit 240 determines whether or not a rotational speed limit is provided for the rotational angle of the gantry 313 and the ring 312 in the speed limit map stored in the speed limit map storage unit 232 (step S103). .
- the control unit 240 exceeds the limit value because at least a deviation between the rotational speed of the gantry 313 or the rotational speed of the ring 312 in the treatment plan has exceeded. It is determined whether or not there is (step S104).
- control unit 240 compares the rotation speed of the gantry 313 in the treatment plan with a preset rotation speed limit value of the gantry 313. In addition, the control unit 240 compares the rotational speed of the ring 312 in the treatment plan with a preset rotational speed limit value of the ring 312. Then, the control unit 240 determines whether at least a deviation between the rotational speed of the gantry 313 or the rotational speed of the ring 312 exceeds the limit value.
- step S104 When it is determined that the rotation speed of the gantry 313 or the ring 312 exceeds the limit value (step S104: YES), the control unit 240 rotates the rotation speed of the gantry 313 and the rotation speed of the ring 312 below the limit value. A speed is set (step S111). At that time, the control unit 240 maintains the rotation speed ratio in the treatment plan and sets the rotation speed of the gantry 313 and the rotation speed of the ring 312.
- control unit 240 sets the command value of the radiation irradiation intensity to a value reduced from the radiation irradiation intensity indicated in the treatment plan (step S112). This is because the irradiation time of the therapeutic radiation becomes longer due to the reduction of the rotation speed of the gantry 313 and the ring 312, whereas the irradiation dose scheduled in the treatment plan is irradiated.
- the controller 240 adjusts the radiation irradiation intensity by controlling the opening degree of the multi-leaf collimator 332.
- control unit 240 generates a control signal for the radiation therapy apparatus 30 based on the set rotation speed of the gantry 313, rotation speed of the ring 312 and radiation irradiation intensity, and sends the control signal to the radiation therapy apparatus 30 via the communication unit 290. Transmit (step S131).
- the control unit 240 determines whether or not the execution of the treatment plan stored in the treatment plan storage unit 231 has been completed (step S132). When it is determined that the execution of the treatment plan has not been completed (step S132: NO), the process returns to step S101. On the other hand, when it is determined that the execution of the treatment plan has been completed (step S132: YES), the process of FIG. 4 is terminated.
- step S103 when it is determined in step S103 that the rotational speed limit is not provided (step S103: NO), the control unit 240 displays the rotational speed of the gantry 313 and the rotational speed of the ring 312 as shown in the treatment plan. Is set (step S121). Moreover, the control part 240 sets the command value of radiation irradiation intensity to the radiation irradiation intensity
- step S104 determines whether the rotational speed of any of the gantry 313 and the ring 312 does not exceed the limit value (step S104: NO). If it is determined in step S104 that the rotational speed of any of the gantry 313 and the ring 312 does not exceed the limit value (step S104: NO), the process proceeds to step S121.
- the control unit 240 controls the radiation treatment apparatus 30. Control the gantry 313 and the ring 312 to operate. In this case, the control unit 240 generates a control signal that instructs the rotational speeds of the gantry 313 and the ring 312 in the same manner as the processing in FIG. 4 but does not instruct radiation irradiation.
- the control unit 240 rotates the gantry 313 while maintaining the ratio of the rotation speed of the gantry 313 and the rotation speed of the ring 312 in the treatment plan based on the rotation angle of the gantry 313 and the rotation angle of the ring 312. Limits are placed on the speed and rotational speed of the ring 312. Thereby, in a state where attention is required for contact between the radiation irradiation apparatus 331 and the couch 381, etc., the control unit 240 moves the radiation irradiation apparatus 331 at a low speed while maintaining the movement path of the radiation irradiation apparatus 331 in the treatment plan. be able to.
- the operator can stop the radiation treatment apparatus 30 and prevent the contact. Even if the radiation irradiation device 331 contacts the couch 381 or the like, it is expected that damage such as damage to the radiation irradiation device 331 or the couch 381 does not occur.
- the speed limit map storage unit 232 stores a speed limit map indicating a relationship between the rotation angle of the gantry 313 and the rotation angle of the ring 312 and the limitation on the rotation speed of the gantry 313 and the rotation speed of the ring 312. Then, the control unit 240 limits the rotational speed of the gantry 313 and the rotational speed of the ring 312 based on the speed limit map. As a result, the control unit 240 can limit the rotation speed of the gantry 313 and the ring 312 with a simple process of reading out the rotation speed restriction information corresponding to the rotation angle of the gantry 313 and the rotation angle of the ring 312 from the speed restriction map. Whether it is necessary or not can be grasped.
- the operation input unit 220 may receive an operation input for instructing the moving speed of the radiation irradiation apparatus 331.
- the control unit 240 maintains the ratio of the rotation speed of the gantry 313 and the rotation speed of the ring 312 shown in the treatment plan based on the operation input, the rotation angle of the gantry 313, and the rotation angle of the ring 312.
- the rotation speed of the gantry 313 and the rotation speed of the ring 312 are limited.
- the operation input unit 220 includes a lever that receives an operation input of the movement speed of the radiation irradiation apparatus 331, and the radiation therapy system 1 inputs the movement speed of the radiation irradiation apparatus 331 by tilting the lever.
- the radiotherapy apparatus controller 20 maintains the ratio of the rotation speeds of the gantry 313 and the ring 312 in the treatment plan, and the rotation speed of the gantry 313 and the ring 312 according to the movement speed of the radiation irradiation apparatus 331 by the operator operation. Calculate the rotation speed.
- the radiotherapy apparatus control apparatus 20 compares the calculated rotation speeds of the gantry 313 and the ring 312 with the rotation speed limit values of the gantry 313 and the ring 312 in the speed limit map, and refers to FIG. As described, the rotation of the gantry 313 and the ring 312 is controlled.
- the operator can confirm the moving path of the radiation irradiation apparatus 331 at a desired speed with a simple operation of operating the tilt of the lever.
- the control unit 240 may cause the gantry 313 and the ring 312 to be in contact with the radiation irradiation device 331 and the couch 381 in a state that requires attention. The ratio of rotation speed is maintained, and the moving speed of the radiation irradiation apparatus 331 is reduced.
- the control unit 240 may temporarily return the movement of the radiation irradiation device 331 (that is, temporarily return the rotation of the gantry 313 and the ring 312) according to an operator operation.
- a program for realizing all or part of the functions of the control unit 240 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may perform the process of.
- the “computer system” includes an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
- the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
- the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line.
- a volatile memory in a computer system serving as a server or a client in that case and a program that holds a program for a certain period of time are also included.
- the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
- the present invention provides a radiotherapy apparatus comprising: a gantry that supports a radiation irradiation device so as to be rotatable around a first axis; and a ring that supports the gantry so as to be rotatable around a second axis that intersects the first axis.
- a radiotherapy apparatus control apparatus for controlling a movement path information storage unit that stores information on a movement path set in the radiation irradiation apparatus, and based on a rotation angle of the gantry and a rotation angle of the ring,
- a radiotherapy apparatus comprising: a control unit that limits the rotation speed of the gantry and the rotation speed of the ring while maintaining a ratio of the rotation speed of the gantry and the rotation speed of the ring indicated in the information of the movement path
- the present invention relates to a control device. According to the radiotherapy apparatus control apparatus described above, a path through which the radiotherapy apparatus can actually move can be more easily ensured.
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Abstract
Description
さらに、放射線照射装置の回転軸を回転可能な放射線治療装置がある。例えば、特許文献1に記載の放射線治療装置では、Oリングが走行ガントリを支持しており、走行ガントリは首振り機構を介して治療用放射線照射装置を支持している。そして、Oリングおよび走行ガントリが回転することで、治療用放射線照射装置を3次元的に移動させることができる。これにより、当該治療用放射線照射装置は、様々な向きから患部に向けて放射線を照射することができ、危険部位への放射線照射量をより確実に低減させることができる。
図1は、本発明の一実施形態における放射線治療装置の装置構成を示す概略構成図である。同図において、放射線治療装置30は、旋回駆動装置311と、リング312と、ガントリ313と、首振り機構321と、照射部330と、カウチ381とを具備する。照射部330は、放射線照射装置331と、マルチリーフコリメータ(Multi Leaf Collimator;MLC)332とを具備する。
リング312は、回転軸A12を中心とするリング状に形成され、回転軸A12を中心に回転可能にガントリ313を支持している。回転軸A12は、水平方向の軸(すなわち、鉛直方向に直角な軸)であり、アイソセンタP11にて回転軸A11と直交する。回転軸A12は、リング312に対して固定されている。すなわち、回転軸A12は、リング312の回転に伴って回転軸A11を中心に回転する。
リング312は、自らが回転することで、ガントリ313およびガントリ313に設置されている各部を、回転軸A11回りに一体的に回転させる。特に、リング312は、自らが回転することで、放射線照射装置331を回転軸A11回りに回転させる。
ガントリ313は、自らが回転することで、ガントリ313に設置されている各部を、回転軸A12回りに一体的に回転させる。特に、ガントリ313は、自らが回転することで放射線照射装置331を回転軸A12回りに回転させる。
パン軸A21は、回転軸A12に平行な軸であり、ガントリ313に対して固定されている。首振り機構321は、パン軸A21を中心に照射部330を回転させることで、照射部330を回転軸A12に対して左右(従って、患者PTに対して左右)に首振り動作させる。
チルト軸A22は、パン軸A21に直交する軸であり、ガントリ313に対して固定されている。首振り機構321は、チルト軸A22を中心に照射部330を回転させることで、照射部330を回転軸A12方向(従って、患者PTに対して上下)に首振り動作させる。
放射線照射装置331は、首振り機構321を介してガントリ313に支持されているので、首振り機構321の調整にて放射線照射装置331が一旦アイソセンタP11に向けられると、旋回駆動装置311によりリング312が回転しても、また、走行駆動装置によりガントリ313が回転しても、治療用放射線B11は常に概ねアイソセンタP11を通る。従って、放射線照射装置331は、回転軸A11や回転軸A12を中心に回転することで、様々な方向からアイソセンタP11に向けて治療用放射線B11を照射することができる。
マルチリーフコリメータ332は、治療用放射線B11の一部を遮蔽することで、治療用放射線B11が患者に照射される際の照射野の形状を患部の形状に合わせる。
カウチ381は、患者PTが横臥することに利用される。
治療計画装置10は、放射線治療における治療計画を生成する。治療計画装置10が生成する治療計画は、放射線治療装置30に対する回転速度の指示を含む。治療計画装置10が生成する治療計画において、放射線照射装置331の移動経路が、ガントリ313およびリング312に対する回転速度の指示にて示される。
治療計画装置10は、例えば、パソコン(Personal Computer;PC)等のコンピュータを含んで構成される。
放射線治療装置制御装置20は、例えば、パソコン等のコンピュータを含んで構成される。
操作入力部220は、例えばキーボードやマウスなどの入力デバイスを含んで構成され、放射線治療システム1のオペレータ(例えば、放射線治療の担当技師)による操作入力を受け付ける。例えば、操作入力部220は、放射線照射開始を指示するオペレータ操作を指示するオペレータ操作を受け付ける。また、操作入力部220は、放射線照射に先行して放射線照射装置331の経路確認のための放射線治療装置30の動作開始を指示するオペレータ操作を受け付ける。以下、放射線治療システム1のオペレータを、単に「オペレータ」と称する。
治療計画記憶部231は、放射線照射装置331に設定された移動経路の情報を記憶する。具体的には、治療計画装置10が生成する治療計画において放射線照射装置331の移動経路が示されており、治療計画記憶部231は、通信部290が治療計画装置10から受信する治療計画を記憶する。
速度制限マップ記憶部232は、速度制限マップを予め記憶している。速度制限マップ記憶部232の記憶する速度制限マップは、ガントリ313の回転角度およびリング312の回転角度と、ガントリ313の回転速度およびリング312の回転速度に対する制限との関係を示す。
特に、制御部240は、治療計画装置10からの治療計画に従って、放射線治療装置30に対する制御信号を生成する。制御部240が生成する制御信号は、ガントリ313の回転速度に対する制御の情報と、リング312の回転速度に対する制御の情報とを含む。
その際、制御部240は、治療計画に示されるガントリ313の回転速度およびリング312の回転速度の比を維持したまま、ガントリ313の回転速度およびリング312の回転速度を低減させる。これにより、制御部240は、放射線照射装置331の移動経路を治療計画における経路から変化させずに、ガントリ313の回転速度およびリング312の回転速度を低減させることができる。
放射線治療装置30において、通信部390は、放射線治療装置制御装置20の通信部290と通信を行う。特に、通信部390は、通信部290から制御信号を受信する。また、通信部390は、通信部290へ放射線治療装置30の状態情報を送信する。
図3は、速度制限マップ記憶部232が記憶する速度制限マップの一例を示す説明図である。同図において、速度制限マップがグラフの形式で示されている。
また、図3のグラフの縦軸は、リング312の回転角度を示す。図1に示す状態のように回転軸A12が、カウチ381の長手方向に沿う状態におけるリング312の回転角度を0度とし、また、リング312を上側からみて右回転方向を正として、-60度から60度までの範囲が縦軸に示されている。
あるいは、速度制限マップ記憶部232が、ガントリ313の回転角度およびリング312の回転角度毎にガントリ313の回転速度に対する制限値およびリング312の回転速度に対する制限値を示す速度制限マップを記憶するようにしてもよい。
あるいは、速度制限マップ記憶部232が、リング312の回転角度およびガントリ313の回転角度を引数として回転速度制限の有無または制限値を出力する関数を記憶するようにしてもよい。
図4は、制御部240が放射線治療装置30に対する制御信号を生成して送信する処理手順の例を示す説明図である。放射線治療装置制御装置20は、通信部290が治療計画装置10からの治療計画を受信し、操作入力部220が放射線照射開始を指示するオペレータ操作を受けると、同図の処理を行う。
次に、制御部240は、ガントリ313、リング312各々の回転角度情報を取得する(ステップS102)。例えば、制御部240は、通信部290が放射線治療装置30から受信する、ガントリ313、リング312各々の回転角度情報を取得する。
回転速度の制限が設けられていると判定した場合(ステップS103:YES)、制御部240は、治療計画におけるガントリ313の回転速度またはリング312の回転速度の少なくともずれかが制限値を超過しているか否かを判定する(ステップS104)。
次に、制御部240は、治療計画記憶部231の記憶している治療計画の実行を完了したか否かを判定する(ステップS132)。治療計画の実行を完了していないと判定した場合(ステップS132:NO)、ステップS101へ戻る。一方、治療計画の実行を完了したと判定した場合(ステップS132:YES)、図4の処理を終了する。
また、制御部240は、放射線照射強度の指令値を、治療計画に示される放射線照射強度に設定する(ステップS122)。
その後、ステップS131へ進む。
これにより、放射線照射装置331とカウチ381等との接触に注意を要する状態において、制御部240は、治療計画における放射線照射装置331の移動経路を維持したまま、放射線照射装置331を低速で移動させることができる。放射線照射装置331が低速で移動することで、オペレータは、放射線照射装置331がカウチ381等に接触しそうになった場合、放射線治療装置30を停止させて接触を未然に防ぐことができる。また、万一、放射線照射装置331がカウチ381等に接触した場合でも、放射線照射装置331やカウチ381の破損など被害が発生しないことが期待される。
これにより、制御部240は、ガントリ313の回転角度およびリング312の回転角度に対応する回転速度制限情報を速度制限マップから読み出すという簡単な処理にて、ガントリ313やリング312に対する回転速度の制限の要否を把握することができる。
そして、放射線治療装置制御装置20は、算出したガントリ313、リング312各々の回転速度と、速度制限マップにおけるガントリ313、リング312各々の回転速度制限値とを比較して、図4を参照して説明したのと同様に、ガントリ313およびリング312の回転を制御する。
そして、オペレータが放射線照射装置331を比較的高速に動作させる操作を行った場合でも、放射線照射装置331とカウチ381との接触に注意を要する状態では、制御部240が、ガントリ313およびリング312の回転速度の比を維持して放射線照射装置331の移動速度を低減させる。放射線照射装置331が低速で移動することで、オペレータは、放射線照射装置331がカウチ381等に接触しそうになった場合、放射線治療装置30を停止させて接触を未然に防ぐことができる。また、万一、放射線照射装置331がカウチ381等に接触した場合でも、放射線照射装置331やカウチ381の破損など被害が発生しないことが期待される。
なお、制御部240が、オペレータ操作に応じて、放射線照射装置331の移動を一旦戻す(すなわち、ガントリ313やリング312の回転を一旦戻す)ようにしてもよい。
また、「コンピュータシステム」は、WWWシステムを利用している場合であれば、ホームページ提供環境(あるいは表示環境)も含むものとする。
また、「コンピュータ読み取り可能な記録媒体」とは、フレキシブルディスク、光磁気ディスク、ROM、CD-ROM等の可搬媒体、コンピュータシステムに内蔵されるハードディスク等の記憶装置のことをいう。さらに「コンピュータ読み取り可能な記録媒体」とは、インターネット等のネットワークや電話回線等の通信回線を介してプログラムを送信する場合の通信線のように、短時間の間、動的にプログラムを保持するもの、その場合のサーバやクライアントとなるコンピュータシステム内部の揮発性メモリのように、一定時間プログラムを保持しているものも含むものとする。また上記プログラムは、前述した機能の一部を実現するためのものであっても良く、さらに前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるものであってもよい。
上記した放射線治療装置制御装置によれば、放射線治療装置が実際に移動可能な経路をより容易に確保することができる。
10 治療計画装置
20 放射線治療装置制御装置
210 表示部
220 操作入力部
230 記憶部
231 治療計画記憶部
232 速度制限マップ記憶部
240 制御部
290 通信部
30 放射線治療装置
312 リング
313 ガントリ
331 放射線照射装置
390 通信部
90 通信回線
Claims (6)
- 第1軸線回りに回転可能に放射線照射装置を支持するガントリと、前記第1軸線に交差する第2軸線回りに回転可能に前記ガントリを支持するリングと、を具備する放射線治療装置を制御する放射線治療装置制御装置であって、
前記放射線照射装置に設定された移動経路の情報を記憶する移動経路情報記憶部と、
前記ガントリの回転角度および前記リングの回転角度に基づいて、前記移動経路の情報に示される前記ガントリの回転速度および前記リングの回転速度の比を維持したまま、前記ガントリの回転速度および前記リングの回転速度に制限を設ける制御部と、
を具備する放射線治療装置制御装置。 - 前記ガントリの回転角度および前記リングの回転角度と、前記ガントリの回転速度および前記リングの回転速度に対する制限との関係を示す速度制限マップを記憶する速度制限マップ記憶部を具備し、
前記制御部は、前記速度制限マップに基づいて、前記ガントリの回転速度および前記リングの回転速度に制限を設ける、
請求項1に記載の放射線治療装置制御装置。 - 前記放射線照射装置の移動速度を指示する操作入力を受け付ける操作入力部を具備し、
前記制御部は、前記操作入力と、前記ガントリの回転角度と、前記リングの回転角度とに基づいて、前記移動経路の情報に示される前記ガントリの回転速度および前記リングの回転速度の比を維持したまま、前記ガントリの回転速度および前記リングの回転速度に制限を設ける、
請求項1に記載の放射線治療装置制御装置。 - 第1軸線回りに回転可能に放射線照射装置を支持するガントリと、
前記第1軸線に交差する第2軸線回りに回転可能に前記ガントリを支持するリングと、
前記放射線照射装置に設定された移動経路の情報を記憶する移動経路情報記憶部と、
前記ガントリの回転角度および前記リングの回転角度に基づいて、前記移動経路の情報に示される前記ガントリの回転速度および前記リングの回転速度の比を維持したまま、前記ガントリの回転速度および前記リングの回転速度に制限を設ける制御部と、
を具備する放射線治療システム。 - 放射線照射装置に設定された移動経路の情報を記憶する移動経路情報記憶部を具備する放射線治療装置制御装置が、第1軸線回りに回転可能に前記放射線照射装置を支持するガントリと、前記第1軸線に交差する第2軸線回りに回転可能に前記ガントリを支持するリングと、を具備する放射線治療装置を制御する放射線治療装置制御方法であって、
前記ガントリの回転角度および前記リングの回転角度に基づいて、前記移動経路の情報に示される前記ガントリの回転速度および前記リングの回転速度の比を維持したまま、前記ガントリの回転速度および前記リングの回転速度に制限を設ける制御ステップ
を具備する放射線治療装置制御方法。 - 第1軸線回りに回転可能に放射線照射装置を支持するガントリと、前記第1軸線に交差する第2軸線回りに回転可能に前記ガントリを支持するリングと、を具備する放射線治療装置を制御する放射線治療装置制御装置であって、前記放射線照射装置に設定された移動経路の情報を記憶する移動経路情報記憶部を具備する放射線治療装置制御装置の具備するコンピュータに、
前記ガントリの回転角度および前記リングの回転角度に基づいて、前記移動経路の情報に示される前記ガントリの回転速度および前記リングの回転速度の比を維持したまま、前記ガントリの回転速度および前記リングの回転速度に制限を設ける制御ステップ
を実行させるためのプログラム。
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CN101632590B (zh) * | 2008-07-22 | 2011-06-01 | 北京东方逸腾数码医疗设备技术有限公司 | 一种防止产生运动干涉的装置和方法 |
DE102009032431B4 (de) * | 2009-07-09 | 2016-10-27 | Siemens Healthcare Gmbh | Medizinisches Gerät mit Kollisionsschutzvorrichtung |
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JP2012045163A (ja) * | 2010-08-26 | 2012-03-08 | Mitsubishi Heavy Ind Ltd | 放射線治療装置制御装置および放射線治療装置制御方法 |
JP6049433B2 (ja) | 2012-12-07 | 2016-12-21 | 三菱重工業株式会社 | 制御情報生成装置、放射線治療装置、放射線治療システムおよび制御情報生成方法 |
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JP2009297324A (ja) * | 2008-06-16 | 2009-12-24 | Mitsubishi Heavy Ind Ltd | 放射線治療装置およびガントリ角度制限方法 |
WO2010073308A1 (ja) | 2008-12-22 | 2010-07-01 | 三菱重工業株式会社 | 放射線断層撮影方法 |
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EP3037130A4 (en) | 2016-08-17 |
US20160166858A1 (en) | 2016-06-16 |
US9974981B2 (en) | 2018-05-22 |
JP5996121B2 (ja) | 2016-09-21 |
JPWO2015052766A1 (ja) | 2017-03-09 |
CN105431198A (zh) | 2016-03-23 |
EP3037130A1 (en) | 2016-06-29 |
CN105431198B (zh) | 2018-03-13 |
EP3037130B1 (en) | 2017-12-13 |
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