WO2020246393A1 - Équipement d'irradiation par faisceau de particules chargées - Google Patents

Équipement d'irradiation par faisceau de particules chargées Download PDF

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Publication number
WO2020246393A1
WO2020246393A1 PCT/JP2020/021425 JP2020021425W WO2020246393A1 WO 2020246393 A1 WO2020246393 A1 WO 2020246393A1 JP 2020021425 W JP2020021425 W JP 2020021425W WO 2020246393 A1 WO2020246393 A1 WO 2020246393A1
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WIPO (PCT)
Prior art keywords
accelerator
irradiation device
charged particle
particle beam
irradiation
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PCT/JP2020/021425
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English (en)
Japanese (ja)
Inventor
健蔵 佐々井
Original Assignee
住友重機械工業株式会社
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Application filed by 住友重機械工業株式会社 filed Critical 住友重機械工業株式会社
Publication of WO2020246393A1 publication Critical patent/WO2020246393A1/fr

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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
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K5/00—Irradiation devices
    • G21K5/04—Irradiation devices with beam-forming means

Definitions

  • the present invention relates to a charged particle beam irradiation facility.
  • the charged particle beam irradiation equipment includes an accelerator that accelerates charged particles to generate charged particle beams, an irradiator that has a rotating part that can rotate around the axis of rotation and irradiates the charged particle beams generated by the accelerator, and an accelerator. It is provided with a transport route for transporting charged particle beams from the accelerator to the irradiator.
  • the charged particle beam irradiation facility shown in FIG. 2 of Patent Document 1 is provided with a plurality of irradiation devices for one accelerator in a plan view.
  • the transport path is connected to the irradiator in a large U-shape from the accelerator so that the accelerator can distribute the charged particle beam to each irradiator.
  • the charged particle beam irradiation device shown in FIG. 4 of Patent Document 1 is provided with a selection unit (ESS: Energy Selection System) for selecting the energy of the charged particle beam at the upper part of the irradiation device.
  • ESS Energy Selection System
  • an object of the present invention is to provide a charged particle beam irradiation facility capable of suppressing the amount of radiation in the vicinity of the irradiation device and reducing the footprint of the device.
  • the charged particle beam irradiation equipment has an accelerator that accelerates charged particles to generate charged particle beams and a rotating portion that can rotate around the axis of rotation, and the charged particle beams generated by the accelerator are placed in the rotating portion.
  • the accelerator and the irradiation device are provided at a position separated from each other in the first direction in a plan view, and are provided with an irradiation device for irradiating the accelerator and a transport path for transporting charged particle beams from the accelerator to the irradiation device.
  • a selection unit that selects a specific range of energy from a predetermined range of energy of the charged particle beam is arranged in the transport path outside the accelerator, and the transport path is in the first direction from the accelerator to the position on the irradiation device side.
  • a first straight portion that is inclined and extends linearly with respect to the accelerator, and a second straight portion that is inclined and extends linearly with respect to the first direction from the irradiator to the position on the accelerator side, and the first It is provided with a curved portion that bends a path between the straight portion and the second straight portion.
  • a selection unit for selecting a specific range of energy from a predetermined range of energy of the charged particle beam is arranged in a transport path outside the irradiation device.
  • the selection unit can be arranged at a position far from the irradiation device. Therefore, the amount of radiation in the vicinity of the irradiation device can be suppressed.
  • the transportation route includes a first straight line portion, a second straight line portion, and a curved portion that bends the path between the first straight line portion and the second straight line portion.
  • the first straight line portion extends linearly from the accelerator to the position on the irradiation device side, inclined with respect to the first direction.
  • the second straight line portion extends linearly from the irradiation device to the position on the accelerator side inclining with respect to the first direction.
  • Such a transport path is such that the straight portions bend at the curved portion in such a manner that the accelerator gradually approaches the irradiation device.
  • such a transportation route can have a small footprint, unlike a transportation route in which the accelerator wraps around in a large U shape and heads for the irradiation device. From the above, it is possible to suppress the amount of radiation in the vicinity of the irradiation device and reduce the footprint of the equipment.
  • the charged particle beam irradiation equipment further includes an equipment arrangement room having an irradiation device arrangement space in which an irradiation device is arranged and an accelerator arrangement space in which an accelerator and a transportation path are arranged, and the equipment arrangement room is irradiated.
  • An indoor shielding wall that shields radiation indoors, which is provided between the device placement space and the accelerator placement space, is placed on the opposite side of the bending direction of the curved portion, and communicates between the irradiation device placement space and the accelerator placement space. It may be provided with a communication section. In this case, even when the accelerator, the irradiation device, and the transportation path are arranged in one room, the radiation generated in the accelerator arrangement space is shielded by the indoor shielding wall. Further, since the communication portion is arranged on the side opposite to the bending direction of the curved portion, the radiation in the accelerator arrangement space is suppressed from leaking to the irradiation device arrangement space through the communication portion.
  • a passage forming wall portion extending in a direction intersecting the communicating portion is formed at a position facing the communicating portion in the accelerator arrangement space.
  • the passage forming wall portion can shield the radiation directed to the irradiation device arrangement space through the communication portion.
  • the present invention it is possible to provide a charged particle beam irradiation facility capable of suppressing the amount of radiation in the vicinity of the irradiation device and reducing the footprint of the facility.
  • the charged particle beam therapy facility is applied to cancer treatment, for example, and is a device that irradiates a tumor (irradiation target) in a patient's body with a charged particle beam such as a proton beam.
  • the charged particle beam irradiation facility 1 is generated by an accelerator 2 that generates a charged particle beam, a rotatable irradiation device 3 that irradiates a patient with a charged particle beam from an arbitrary direction, and an accelerator 2. It is provided with a transport path 4 that guides the charged particle beam to the irradiation device 3. Further, each device of the charged particle beam irradiation facility 1 is installed in one room of the one-story building 6.
  • Accelerator 2 is a device that generates charged particle beams by accelerating charged particles.
  • the accelerator 2 for example, a cyclotron or the like is adopted.
  • the charged particle beam generated by the accelerator 2 passes through the orbit formed by the transport path 4 and is guided to the irradiation device 3.
  • the detailed configuration of the transportation route 4 will be described later.
  • the accelerator 2 includes a vacuum vessel 21 that accelerates ions (charged particles) while orbiting them on an acceleration plane, and an ion source (not shown) that supplies ions into the vacuum vessel 21.
  • the vacuum container 21 communicates with the transportation route 4.
  • the charged particle beam orbiting in the vacuum vessel 21 is taken out from the orbit by the deflector 22 and supplied to the transport path 4.
  • the acceleration plane of the accelerator 2 extends in the horizontal direction.
  • the center of the acceleration plane is the center point CP2 (see FIGS. 1 and 2).
  • the center line extending in the vertical direction of the vacuum vessel 21 passes through the center point CP2.
  • the irradiation device 3 is composed of a so-called rotating gantry, and is a treatment table 31 on which the patient lies (see FIG. 3), and a rotating portion 30 provided so as to surround the treatment table 31.
  • the irradiation unit 32 which is arranged inside the rotating unit 30 and irradiates the charged particle beam toward the patient on the treatment table 31, and the introduction line 33 that introduces the charged particle beam guided by the transport path 4 into the irradiation unit 32. I have.
  • the irradiation device 3 is rotationally driven by a motor (not shown) and stopped by a braking device (not shown).
  • the front surface of the irradiation device 3 means the side surface on the side where the treatment table 31 is installed and the rotating portion 30 is open so that the patient can enter and exit, and the back surface is defined as the back surface. It means the side of the back side.
  • the rotating portion 30 is rotatable and includes a first cylindrical portion 34, a cone portion 35, and a second cylindrical portion 36 in order from the front side.
  • the first cylindrical portion 34, the cone portion 35, and the second cylindrical portion 36 are coaxially arranged and fixed to each other.
  • the irradiation unit 32 is arranged on the inner surface of the first cylindrical portion 34 and is directed in the axial direction of the first cylindrical portion 34.
  • the treatment table 31 is arranged in the vicinity of the rotation axis CL1 of the first cylindrical portion 34.
  • the second cylindrical portion 36 has a smaller diameter than the first cylindrical portion 34, and the cone portion 35 is formed in a conical shape so as to connect the first cylindrical portion 34 and the second cylindrical portion 36.
  • the intersection of the rotation axis CL1 and the irradiation axis of the charged particle beam is referred to as isocenter CP1 (see FIG. 4).
  • the irradiation axis of the charged particle beam passes through the isocenter CP1 regardless of the angle at which the irradiation unit 32 irradiates the charged particle beam.
  • the irradiation axis is the central axis of the charged particle beam when the charged particle beam is not scanned by a scanning magnet or the like.
  • a front ring 39a is installed on the outer peripheral portion of the front end of the first cylindrical portion 34, and a rear ring 39b is installed on the outer peripheral portion of the rear end of the first cylindrical portion 34.
  • the first cylindrical portion 34 is rotatably supported by a roller device 40 (see FIG. 2) arranged below the first cylindrical portion 34.
  • the outer peripheral surfaces of the front ring 39a and the rear ring 39b come into contact with the roller device 40, and a rotational force is applied by the roller device 40.
  • the introduction line 33 is connected to the transportation path 4 on the back side of the irradiation device 3.
  • the introduction line 33 includes two sets of 45 degree deflection electromagnets and two sets of 135 degree deflection electromagnets.
  • the introduction line 33 has a radial introduction line 33a that is connected to the transportation route 4 and extends in the radial direction, and a circumferential introduction line 33b that is continuous with the subsequent stage of the radial introduction line 33a and extends in the circumferential direction. ..
  • the introduction line 33 is provided with a beam transport tube (not shown) along the trajectory of the charged particle beam.
  • the radial introduction line 33a is curved 90 degrees (45 degrees ⁇ 2 times) with respect to the rotation axis CL1 from the start end portion communicating with the transportation path 4 on the rotation axis CL1 in the second cylindrical portion 36 and extends in the radial direction. It is a path portion that exists and whose end portion projects to the outside of the first cylindrical portion 34. Further, the circumferential introduction line 33b is curved and extends 135 degrees in the circumferential direction of the rotating portion 30 from the start end portion communicating with the end portion of the radial introduction line 33a, and further extends 135 degrees inward in the radial direction. It is a path portion that is curved and the end portion communicates with the irradiation portion 32.
  • the circumferential introduction line 33b is arranged along the circumferential direction at a position separated outward from the outer peripheral surface of the first cylindrical portion 34, and is supported by the gantry 37.
  • the gantry 37 is formed so as to project outward in the radial direction from the outer peripheral surface of the first cylindrical portion 34.
  • the counterweight 38 is arranged so as to face the circumferential introduction line 33b and the gantry 37 with the rotation axis CL1 interposed therebetween.
  • the counterweight 38 is fixed to the outer peripheral surface of the first cylindrical portion 34 and is installed so as to project outward in the radial direction. By installing the counterweight 38, the weight balance between the introduction line 33 and the gantry 37 is ensured. Further, the outer edge up to the length of the rotational axis CL1 from the counterweight 38, the short and building 6A than the length up to the outer edge of the introduction line 33 from the axis of rotation CL 1 can be miniaturized.
  • the front and rear along the rotation axis line CL1 direction length L 1 is formed in a short thin than the maximum outer diameter of the rotating portion 30 (maximum width).
  • the longitudinal length L 1 for example, from the front end of the first cylindrical portion 34, until the rear end of the second cylindrical portion 36 is a length L 1.
  • the portion corresponding to the length from the rotation axis CL1 to the outer edge of the counterweight 38 may have a maximum outer diameter.
  • the building 6 constituting the charged particle beam irradiation facility 1 will be described.
  • the building 6 includes an equipment arrangement room 7 and a control room 8.
  • the building 6 is, for example, a reinforced concrete structure or a steel-framed concrete structure.
  • the building 6 of the present embodiment is formed in a rectangular shape in a plan view.
  • XY coordinates may be set for FIGS. 1 and 2 for explanation.
  • the location where the control chamber 8 is provided is the front side, the front-rear direction when viewed from the control chamber 8 is the Y-axis direction, and the horizontal direction orthogonal to the Y-axis direction is the X-axis direction.
  • the front side is the positive side in the Y-axis direction and the rear side is the negative side in the Y-axis direction.
  • One side in the X-axis direction is the positive side, and the other side is the negative side.
  • the equipment arrangement room 7 is a room in which the accelerator 2, the irradiation device 3, and the transportation route 4 are arranged.
  • the equipment arrangement room 7 has a substantially rectangular shape having a longitudinal direction in the Y-axis direction and a lateral direction in the X-axis direction in a plan view.
  • the equipment arrangement room 7 is configured to include a radiation shielding wall that shields radiation.
  • the wall referred to as a "shielding wall” in the following description is a wall made of a material capable of shielding radiation and having a sufficient thickness for shielding radiation. Concrete is an example of a material that can shield radiation.
  • the equipment arrangement room 7 shields the indoor space from the outside by outdoor shielding walls 11A, 11B, 11C, 11D on all sides.
  • the outdoor shielding wall 11A extends parallel to the Y-axis direction at a position on the positive side in the X-axis direction.
  • the outdoor shielding wall 11B extends parallel to the Y-axis direction so as to be separated from the outdoor shielding wall 11A on the negative side in the X-axis direction and parallel to the outdoor shielding wall 11A.
  • the outdoor shielding wall 11B has a front region 11Ba that shifts to the positive side in the X-axis direction to form a step near the end portion on the positive side in the Y-axis direction.
  • the outdoor shielding wall 11C extends parallel to the X-axis direction so as to connect the ends of the outdoor shielding walls 11A and 11B on the positive side in the Y-axis direction.
  • the outdoor shielding wall 11D extends parallel to the X-axis direction so as to connect the negative end portions of the outdoor shielding walls 11A and 11B in the Y-axis direction.
  • the equipment arrangement room 7 has an irradiation device arrangement space SP1 in which the irradiation device 3 is arranged, and an accelerator arrangement space SP2 in which the accelerator 2 and the transportation path 4 are arranged.
  • the irradiation device arrangement space SP1 is arranged on the positive side in the Y-axis direction in the equipment arrangement room 7, and the accelerator arrangement space SP2 is arranged on the negative side in the Y-axis direction in the equipment arrangement room 7.
  • the equipment arrangement room 7 includes an indoor shielding wall 12 and a communication portion 13.
  • the indoor shielding wall 12 is a wall provided between the irradiation device arrangement space SP1 and the accelerator arrangement space SP2 to shield radiation indoors.
  • the communication portion 13 is a portion formed between the irradiation device arrangement space SP1 and the accelerator arrangement space SP2 to communicate the irradiation device arrangement space SP1 and the accelerator arrangement space SP2.
  • the indoor shielding wall 12 extends toward the room from the vicinity of the positive end in the Y-axis direction of the outdoor shielding wall 11B, specifically, from the negative end in the Y-axis direction of the front region 11Ba.
  • the indoor shielding wall 12 has an inclined portion 12a extending from the outdoor shielding wall 11B in an inclined state with respect to the X-axis direction, and a parallel portion 12b extending parallel to the X-axis direction from the tip of the inclined portion 12a.
  • the inclined portion 12a is inclined toward the negative side in the Y-axis direction toward the positive side in the X-axis direction.
  • the parallel portion 12b extends from the tip end portion of the inclined portion 12a toward the positive side in the X-axis direction.
  • a gap is formed between the tip of the parallel portion 12b and the outdoor shielding wall 11A, and the gap serves as the communication portion 13. The detailed configuration in the vicinity of the communication portion 13 will be described later.
  • the bottom of the irradiation device arrangement space SP1 and the accelerator arrangement space SP2 is shielded by the floor shielding wall 11E, and the upper part is shielded by the ceiling shielding wall 11F.
  • the ceiling shielding wall 11F is provided with a lid made of a shielding member that closes the openings used when the irradiation device 3 and the accelerator 2 are carried in and out, respectively.
  • the control room 8 is provided at a position on the front side, that is, on the positive side in the Y-axis direction with respect to the equipment arrangement room 7.
  • the control chamber 8 is provided on the outdoor side of the outdoor shielding wall 11C.
  • the outdoor shielding wall 11C is formed with an entrance portion 14 that communicates the equipment arrangement room 7 and the control room 8. The detailed configuration near the entrance portion 14 will be described later.
  • the irradiation device 3 is arranged so that the opening 3a (opening of the rotating portion 30) on the front end side opens to the positive side in the Y-axis direction.
  • the irradiation device 3 is arranged so that the rotation axis CL1 is inclined with respect to the Y-axis direction.
  • the irradiation device 3 is inclined so that the rotation axis CL1 is directed toward the positive side in the Y-axis direction and is directed toward the positive side in the X-axis direction.
  • the rotation axis CL1 is inclined at approximately 45 ° with respect to the Y-axis direction, but the inclination angle is not particularly limited.
  • the opening 3b (opening of the second cylindrical portion 36) on the rear end side of the irradiation device 3 is connected to the side surface of the inclined portion 12a of the indoor shielding wall 12. Therefore, the inclination angle of the inclined portion 12a is set to an angle orthogonal to the rotation axis CL1 of the irradiation device 3.
  • the space on the front side of the opening 3b is a space for making preparations for setting the patient at the treatment position in the irradiation device 3.
  • the space and the space on the back side of the opening 3a of the irradiation device 3 are partitioned by a partition plate 16.
  • the accelerator 2 is arranged at a position closer to the outdoor shielding wall 11D (that is, a position on the negative side in the Y-axis direction) than the parallel portion 12b of the indoor shielding wall 12 in the Y-axis direction. Further, the accelerator 2 is arranged at a position closer to the outdoor shielding wall 11A than the outdoor shielding wall 11B (that is, a position on the positive side in the X-axis direction) in the X-axis direction. Further, the accelerator 2 is arranged so as to face the irradiation device 3 and the indoor shielding wall 12 in the Y-axis direction.
  • the accelerator 2 is arranged at a position separated from the irradiation device 3 on the negative side in the Y-axis direction.
  • the virtual line connecting the isocenter CP1 of the irradiation device 3 and the center point CP2 of the accelerator 2 may be referred to as a reference line SL.
  • the reference line SL extends in the horizontal direction (see FIG. 2).
  • the center point CP2 and the isocenter CP1 are arranged at substantially the same position when viewed from the Y-axis direction. Therefore, the reference line SL extends so as to be substantially parallel to the Y-axis direction.
  • the arrangement of the accelerator 2 is not limited to this arrangement.
  • the center point CP2 of the accelerator 2 may be arranged so as to be within the size range of the rotating portion 30 of the irradiation device 3 when viewed from the Y-axis direction.
  • the amount of deviation in the X-axis direction between the center point CP2 of the accelerator 2 and the isocenter CP1 of the irradiation device 3 may be arranged so as to be smaller than the radius of the vacuum vessel 21 of the accelerator 2.
  • at least a part of the irradiation device 3 and a part of the accelerator 2 may be arranged so as to overlap when viewed from the Y-axis direction.
  • the irradiation device 3 and the accelerator 2 may be arranged so as not to overlap each other when viewed from the Y-axis direction within a range in which the footprint of the building 6 in the X-axis direction is not excessively widened.
  • the transportation route 4 includes a first straight line portion 41, a second straight line portion 42, and a curved portion 43.
  • the first straight line portion 41 is a portion that extends linearly from the accelerator 2.
  • the first straight line portion 41 extends along the irradiation axis EL of the charged particle beam emitted from the accelerator 2.
  • the second straight line portion 42 is a portion that extends linearly from the irradiation device 3 via the indoor shielding wall 12.
  • the second straight line portion 42 extends along the rotation axis CL1 of the irradiation device 3.
  • the curved portion 43 is a portion that bends a path between the first straight portion 41 and the second straight portion 42.
  • the direction in which the accelerator 2 and the irradiation device 3 are separated from each other in a plan view is defined as the "first direction D1".
  • the direction in which the reference line SL extends is defined as the first direction D1.
  • the first straight line portion 41 extends linearly from the accelerator 2 to the position on the irradiation device 3 side in the first direction D1.
  • the first straight line portion 41 extends in a state of being inclined with respect to the first direction D1 and sequentially approaches the isocenter CP1 as it moves away from the accelerator 2, that is, toward the positive side in the Y-axis direction. ..
  • the second straight line portion 42 extends linearly from the irradiation device 3 to the position on the accelerator 2 side in the first direction D1.
  • the second straight line portion 42 is inclined with respect to the first direction D1 and gradually approaches the center point CP2 as it moves away from the irradiation device 3, that is, toward the negative side in the Y-axis direction. Extend.
  • the first straight line portion 41 and the second straight line portion 42 form 90 °, but the angle is not particularly limited and may be set to an angle larger than or smaller than 90 °, for example. ..
  • the transportation route 4 extends so as to approach the irradiation device 3 without detouring from the accelerator 2.
  • the transport path 4 extending from the accelerator 2 is sequentially approached to the center point CP3. Extend. Therefore, the connection portion with the accelerator 2 in the transportation path 4 is the portion farthest from the center point CP3.
  • the transport path 4 extending from the accelerator 2 sequentially extends so as to approach the isocenter CP1. Therefore, the connection portion with the accelerator 2 in the transportation path 4 is the portion farthest from the isocenter CP1.
  • the transportation path 4 has a shape in which the straight portions 41 and 42 are bent by one curved portion 43.
  • the transport path 4 is arranged in a region of the accelerator arrangement space SP2 on the negative side in the X-axis direction with respect to the reference line SL, and bends so as to be convex toward the negative side in the X-axis direction. That is, the transport path 4 bends with the negative side in the X-axis direction as the bending direction.
  • the deflector 22 is arranged on the opposite side of the irradiation device 3 with the center point CP2 in between, that is, on the negative side in the Y-axis direction. Further, the deflector 22 is arranged on the negative side in the X-axis direction with respect to the reference line SL. Further, the charged particle beam orbits clockwise in FIG. 1 and is taken out by the deflector 22. In this case, the first straight line portion 41 may have an acute angle with respect to the reference line SL as compared with the case where the deflector 22 is arranged on the irradiation device 3 side and the charged particle beam is orbited counterclockwise. it can.
  • a selection unit 50 that selects energy in a specific range from the energy in a predetermined range of the charged particle beam is arranged in the transport path 4 outside the irradiation device 3.
  • the selection unit 50 is a mechanism called ESS (Energy Selection System).
  • ESS Electronicgy Selection System
  • all the components of the selection unit 50 are arranged in the accelerator arrangement space SP2 across the indoor shielding wall 12.
  • the components of the selection unit 50 are not arranged in the irradiation device arrangement space SP1.
  • the selection unit 50 provided in the first straight line unit 41 includes a quadrupole electromagnet 51, a steering electromagnet 52, a degrader 53, a quadrupole electromagnet 51, and a beam stopper 54 in this order from the upstream side.
  • the quadrupole electromagnet 51 is an electromagnet for converging a charged particle beam and adjusting the shape of the charged particle beam.
  • the steering electromagnet 52 is an electromagnet for correcting the trajectory of the charged particle beam.
  • the degrader 53 is a mechanism for adjusting the range by reducing the energy of the charged particle beam as a whole.
  • the beam stopper 54 is a mechanism for switching between emission and stop of charged particle beams. Since the neutron beam from the degrader 53 travels along the irradiation axis EL, the neutron beam travels so as to avoid the irradiation device arrangement space SP1. Further, the neutron beam enters in an inclined manner with respect to the outdoor shielding wall 11B. In this case, the substantial thickness of the outdoor shielding wall 11B through which the neutron beam passes is thicker than that when the neutron beam enters the outdoor shielding wall 11B straight in the X-axis direction. This makes it possible to improve the shielding property against neutron rays.
  • the selection unit 50 provided in the curved portion 43 includes a deflection electromagnet 56A, a quadrupole electromagnet 51, a slit 57, a quadrupole electromagnet 51, and a deflection electromagnet 56B in this order from the upstream side.
  • the deflecting electromagnet 56A is an electromagnet that bends the trajectory of the charged particle beam transported from the first straight line portion 41. The degree to which a charged particle beam bends depends on the energy. Therefore, the charged particle beam having a desired energy can be selected by bending the charged particle beam with the deflection electromagnet 56A and passing it through the slit 57.
  • the deflection electromagnet 56B bends the orbit of the charged particle beam of the selected energy toward the second straight line portion 42.
  • the curved portion 43 has only two sets of deflection electromagnets 56A and 56B, and does not have another set of deflection electromagnets between the deflection electromagnets 56A and 56B.
  • the deflection electromagnets are arranged continuously, they are regarded as one set of deflection electromagnets. That is, when the deflection electromagnet 56A is divided into a plurality of continuous deflection electromagnets, it is regarded as one set of deflection electromagnets.
  • the region between the deflection electromagnets 56A and 56B in the curved portion 43 is a straight portion extending linearly, but the straight portion is shorter than the first straight portion 41.
  • the selection unit 50 provided in the second straight line unit 42 includes a quadrupole electromagnet 51 and a steering electromagnet 52 in this order from the upstream side.
  • the component of the selection unit 50 is not provided in the portion of the second straight line portion 42 that is buried in the indoor shielding wall 12.
  • the inlet portion 14 is formed at the position of the end portion on the positive side in the X-axis direction of the outdoor shielding wall 11C.
  • the entrance portion 14 is configured by penetrating the outdoor shielding wall 11C so as to extend in the Y-axis direction.
  • the inlet portion 14 is arranged on the positive side in the X-axis direction with respect to the reference line SL.
  • the radiation due to the influence of the charged particle beam irradiating the isocenter CP1 passes through the isocenter CP1 and becomes stronger in the plane F orthogonal to the rotation axis CL1.
  • the inlet portion 14 is formed on the extension line of the rotation axis CL1 or at a position close to the extension line of the rotation axis CL1. Therefore, the inlet portion 14 is arranged at a position as far as possible from the plane F where the radiation becomes strong.
  • the communication portion 13 is formed so as to extend in the Y-axis direction at the position of the positive end portion of the indoor shielding wall 12 in the X-axis direction.
  • the communication portion 13 is arranged on the positive side in the X-axis direction, which is the side opposite to the bending direction of the curved portion 43. That is, the communication portion 13 is arranged on the positive side in the X-axis direction with respect to the reference line SL.
  • a passage forming wall portion 19 extending in a direction intersecting the communication portion 13 is formed at a position facing the communication portion 13.
  • the passage forming wall portion 19 is formed as an indoor shielding wall capable of shielding radiation from the accelerator 2.
  • the passage forming wall portion 19 is arranged so as to face the communication portion 13 on the negative side in the Y-axis direction. Further, the passage forming wall portion 19 is formed so as to extend in the X-axis direction orthogonal to the extending direction of the communication portion 13. The passage forming wall portion 19 extends from the outdoor shielding wall 11A to the negative side in the X-axis direction. In this way, the communication portion 13 and the passage 18 form an L-shaped passage.
  • a passage 18 is formed between the passage forming wall portion 19 and the parallel portion 12b of the indoor shielding wall 12. The opening 18a of the passage 18 with respect to the accelerator arrangement space SP2 opens to the negative side in the X-axis direction.
  • the opening 18a is arranged on the positive side in the X-axis direction with respect to the reference line SL.
  • the passage forming wall portion 19 is arranged so as to cover the communication portion 13 from any position of the accelerator 2. As a result, the radiation from the accelerator 2 is suppressed from directly entering the communication portion 13.
  • the irradiation device arrangement space SP1 and the accelerator arrangement space SP2 are configured as one floor and as one room by connecting the floors in the communication portion 13 and the passage 18.
  • the floor surface H1 of the irradiation device arrangement space SP1 and the floor surface H2 of the accelerator arrangement space SP2 are provided at the same height position.
  • the lower end of the irradiation device 3 is installed on the floor surface H3 at a position lower than the floor surface H1.
  • the charged particle beam irradiation facility 100 includes a control chamber 108, an irradiation device arrangement chamber 110 for arranging the irradiation device 3, and an accelerator arrangement chamber 120 for arranging the accelerator 2.
  • the irradiation device arrangement chamber 110 and the accelerator arrangement chamber 120 have independent inlets 111 and 121, respectively, and do not have portions that communicate with each other. Therefore, the irradiation device arrangement room 110 is configured as one room, and the accelerator arrangement room 120 is configured as one room.
  • the irradiation device arrangement chamber 110 and the accelerator arrangement chamber 120 are provided so as to be arranged in the X-axis direction.
  • a transport path 140 extending from the accelerator 2 to the irradiation device 3 is provided in the accelerator arrangement chamber 120.
  • the transportation route 140 includes a first straight line portion 141, a second straight line portion 142, and a swivel portion 143 that largely wraps around between the straight lines portions 141 and 142.
  • the first straight line portion 141 extends linearly from the accelerator 2 to a position away from the irradiation device 3 in the first direction D1.
  • the swivel portion 143 is largely swiveled from the first straight line portion 141 by four sets of deflection electromagnets 56, and is connected to the second straight line portion 142.
  • a quadrupole electromagnet or the like is arranged between the deflection electromagnets 56.
  • the charged particle beam irradiation facility 1 is a selection unit that selects energy in a specific range from the energy in a predetermined range of the charged particle beam in the transport path 4 outside the irradiation device 3. 50 is placed.
  • the selection unit 50 can be arranged at a position far from the irradiation device 3. Therefore, the amount of radiation in the vicinity of the irradiation device 3 can be suppressed.
  • the transportation route 4 includes a first straight line portion 41, a second straight line portion 42, and a curved portion 43 that bends the path between the first straight line portion 41 and the second straight line portion 42. ..
  • the first straight line portion 41 extends linearly from the accelerator 2 to the position on the irradiation device 3 side inclining with respect to the first direction D1.
  • the second straight line portion 42 is inclined and linearly extends from the irradiation device 3 to the position on the accelerator 2 side with respect to the first direction D1.
  • Such a transport path 4 is such that the straight portions 41 and 42 bend at the curved portion 43 in such a manner that the accelerator 2 gradually approaches the irradiation device 3.
  • such a transportation route can reduce the footprint of the equipment, unlike the transportation route in which the accelerator 2 wraps around in a large U shape and heads for the irradiation device 3. .. From the above, it is possible to suppress the amount of radiation in the vicinity of the irradiation device 3 and reduce the footprint of the equipment.
  • the rotation axis CL1 of the irradiation device 3 is inclined with respect to the Y-axis direction.
  • the irradiation device 3 is a type of rotary gantry having a short axial length in the axial direction of the rotary axis CL1. Therefore, the footprint of the equipment can be made particularly small.
  • Such a configuration is particularly effective for a single type facility in which one irradiation device 3 is provided for one accelerator 2.
  • the footprint in the X-axis direction can be effectively reduced. From the viewpoint of land use, if the area is the same, it may be more effective to make the footprint in the X-axis direction smaller than the shape close to a square. The present embodiment is particularly advantageous in such cases.
  • the charged particle beam irradiation equipment 1 further includes an equipment arrangement room 7 having an irradiation device arrangement space SP1 in which the irradiation device 3 is arranged and an accelerator arrangement space SP2 in which the accelerator 2 and the transportation path 4 are arranged.
  • the equipment arrangement room 7 is arranged on the side opposite to the bending direction of the curved portion 43 and the indoor shielding wall 12 provided between the irradiation device arrangement space SP1 and the accelerator arrangement space SP2 for shielding radiation indoors. It is provided with a communication unit 13 that communicates the irradiation device arrangement space SP1 and the accelerator arrangement space SP2.
  • the radiation generated in the accelerator arrangement space SP2 is shielded by the indoor shielding wall 12.
  • the communication portion 13 is arranged on the side opposite to the bending direction of the curved portion 43 and is arranged on the rear side (positive side in the X-axis direction) of the accelerator 2 with respect to the transportation path 4, the accelerator arrangement is performed.
  • the radiation of the space SP2 is suppressed from leaking to the irradiation device arrangement space SP1 via the communication portion 13.
  • a passage forming wall portion 19 extending in a direction intersecting the communicating portion 13 is formed at a position facing the communicating portion 13 in the accelerator arrangement space SP2.
  • the passage forming wall portion 19 can shield the radiation toward the irradiation device arrangement space SP1 via the communication portion 13.
  • the present invention is not limited to the above-described embodiment.
  • an underground passage may be provided to communicate the two.
  • the structure of the shielding wall of the building and the layout of each component may be appropriately changed as long as the gist of the present invention is not deviated.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

L'invention concerne un équipement d'irradiation par faisceau de particules chargées comprenant un accélérateur pour générer un faisceau de particules chargées par accélération de particules chargées, un dispositif d'irradiation qui a une partie rotative pouvant tourner autour d'un axe de rotation et qui irradie le faisceau de particules chargées généré par l'accélérateur dans la partie rotative, et un trajet de propagation pour propager le faisceau de particules chargées de l'accélérateur au dispositif d'irradiation. L'accélérateur et le dispositif d'irradiation sont disposés à des positions qui sont éloignées l'une de l'autre dans une première direction dans une vue en plan. Une unité de sélection permettant de sélectionner une plage spécifique d'énergie à partir d'une plage prescrite d'énergie du faisceau de particules chargées est disposée sur le trajet de propagation à l'extérieur du dispositif d'irradiation. Le trajet de propagation comprend une première partie linéaire qui s'étend de l'accélérateur à une position sur le côté du dispositif d'irradiation de manière linéaire et selon une inclinaison dans le prolongement de la première direction, une seconde partie linéaire qui s'étend du dispositif d'irradiation à une position sur le côté de l'accélérateur de manière linéaire et selon une inclinaison dans le prolongement de la première direction, et une partie incurvée dans laquelle le trajet est plié entre la première partie linéaire et la seconde partie linéaire
PCT/JP2020/021425 2019-06-06 2020-05-29 Équipement d'irradiation par faisceau de particules chargées WO2020246393A1 (fr)

Applications Claiming Priority (2)

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JP2019-106008 2019-06-06
JP2019106008A JP2022113920A (ja) 2019-06-06 2019-06-06 荷電粒子線照射設備

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013508046A (ja) * 2009-10-23 2013-03-07 イオンビーム アプリケーションズ， エス．エー． 粒子線治療で使用するビーム分析器を備えるガントリ
JP2015185432A (ja) * 2014-03-25 2015-10-22 住友重機械工業株式会社 荷電粒子線治療装置及びエネルギー計測方法
JP2016512142A (ja) * 2013-03-15 2016-04-25 ヴァリアン メディカル システムズ インコーポレイテッド 放射線治療システムのためのエネルギー分解器
US20190030373A1 (en) * 2017-07-27 2019-01-31 Sumitomo Heavy Industries, Ltd. Charged particle beam treatment system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013508046A (ja) * 2009-10-23 2013-03-07 イオンビーム アプリケーションズ， エス．エー． 粒子線治療で使用するビーム分析器を備えるガントリ
JP2015163229A (ja) * 2009-10-23 2015-09-10 イオンビーム アプリケーションズ， エス．エー． 粒子線治療で使用するビーム分析器を備えるガントリ
JP2016512142A (ja) * 2013-03-15 2016-04-25 ヴァリアン メディカル システムズ インコーポレイテッド 放射線治療システムのためのエネルギー分解器
JP2015185432A (ja) * 2014-03-25 2015-10-22 住友重機械工業株式会社 荷電粒子線治療装置及びエネルギー計測方法
US20190030373A1 (en) * 2017-07-27 2019-01-31 Sumitomo Heavy Industries, Ltd. Charged particle beam treatment system

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