JP5680510B2 - Charged particle beam irradiation equipment - Google Patents

Description

  The present invention relates to a charged particle beam irradiation apparatus that irradiates a charged particle beam.

  As a technical document in this field, for example, Japanese Patent Application Laid-Open No. 2007-83059 is known. In this publication, a cyclotron that accelerates charged particles and emits a charged particle beam, a gantry in which an irradiation unit that irradiates a patient with a charged particle beam is arranged, and an irradiation unit that emits a charged particle beam emitted from the cyclotron There is disclosed a charged particle beam irradiation apparatus including a transport line for transporting to a position and an X-ray image acquisition apparatus for acquiring an X-ray image of a patient.

JP 2007-83059 A

  By the way, in the X-ray image acquisition device provided in the charged particle beam irradiation apparatus, an X-ray irradiation unit and an X-ray detection unit are arranged in an irradiation chamber in the gantry, and those control units are located on the back side of the irradiation chamber in the gantry. The configuration arranged in the above is general. However, in this configuration, it is necessary for an operator to enter the back of the gantry during maintenance of the control unit, and access to the control unit is not easy. Furthermore, the smaller the gantry is, the more the working space is limited, and there is a problem that the maintainability deteriorates.

  Then, an object of this invention is to provide the charged particle beam irradiation apparatus with high maintainability.

  In order to solve the above-described problems, the present invention provides a charged particle beam irradiation apparatus that irradiates an object to be irradiated with a charged particle beam, an accelerator that accelerates the charged particle and emits the charged particle beam, and the charged particle beam. An irradiating unit for irradiating an irradiating body, a transportation line connecting the accelerator and the irradiating unit, and an irradiating unit are arranged to support a part of the transportation line and to be able to rotate or swing around the central axis And an X-ray image acquisition means for acquiring an X-ray image of the irradiated object, and controls at least one of the X-ray irradiation unit and the X-ray detection unit The first control section is installed on the outer periphery of the gantry.

  According to the charged particle beam irradiation apparatus of the present invention, since the first control unit is installed outside the gantry, the first control unit is installed at the time of maintenance as compared with the conventional configuration in which the first control unit is installed in the gantry. Access to the first control unit becomes easy. Moreover, since the position of the first control unit can be adjusted by rotating or swinging the gantry by installing it on the outer periphery of the gantry, the maintainability with respect to the first control unit can be greatly improved. . Further, it is not necessary to secure a space for the first control unit in the gantry, which is advantageous for downsizing the apparatus.

  In the charged particle beam irradiation apparatus according to the present invention, the transport line is provided on the downstream side of the first deflection unit, the first deflection unit for deflecting the charged particle beam traveling in the extending direction of the central axis, and the charged particle beam Is deflected in a direction perpendicular to the central axis, a third deflector provided on the downstream side of the second deflector to rotate the charged particle beam around the central axis, and downstream of the third deflector And a fourth deflecting unit that deflects the charged particle beam toward the central axis.

  According to the charged particle beam irradiation apparatus of the present invention, since the third deflection unit and the fourth deflection unit deflect the charged particle beam in the radial direction of the gantry, the conventional gantry (the charged particle beam in the extending direction of the central axis) is used. The length of the gantry in the extending direction of the central axis can be shortened compared to the gantry that deflects the gantry. When the length of the gantry in the direction in which the central axis extends is reduced, the space on the back side in the gantry becomes narrower. If the first control unit is to be accommodated in this narrow space, it is necessary to bother to lengthen the gantry. It will occur. According to the charged particle beam irradiation apparatus according to the present invention, the first control unit is disposed on the outer periphery of the gantry, thereby suppressing the length of the gantry in the extending direction of the central axis, and the first control unit. Can be provided.

  The charged particle beam irradiation apparatus according to the present invention further includes a counterweight attached to the outer periphery of the gantry, and the counterweight is attached to a position facing the overhanging portion that projects from the outer periphery of the gantry in the transport line. And the 1st control part may be installed between the overhang | projection part and the counterweight.

  According to the charged particle beam irradiation apparatus according to the present invention, since the first control unit is installed between the overhanging part of the transport line and the counterweight, the empty space on the outer periphery of the gantry can be efficiently used. This is advantageous for downsizing the apparatus.

  In the charged particle beam irradiation apparatus according to the present invention, when viewed from the extending direction of the central axis, the first controller draws the outermost end farthest from the central axis among the overhangs with the central axis as the center. It may be within the rotating orbit.

  According to the charged particle beam irradiation apparatus according to the present invention, since the first control unit is placed inside the rotation orbit drawn by the outermost end of the overhanging portion, the first control unit is arranged outside. It is possible to avoid an increase in the size of the device in the radial direction.

The charged particle beam irradiation apparatus according to the present invention further includes a PET apparatus having a PET camera for detecting gamma rays generated inside the irradiated object, and a second control unit for controlling the PET camera is provided on the outer periphery of the gantry. It may be installed.
According to the charged particle beam irradiation apparatus according to the present invention, since the second control unit is installed on the outer periphery of the gantry, the second control unit is maintained at the time of maintenance compared to the configuration in which the second control unit is installed in the gantry. Access to the second control unit becomes easier. Moreover, since the position of the second control unit can be adjusted by rotating or swinging the gantry by being installed on the outer periphery of the gantry, the maintainability of the second control unit can be greatly improved. . Further, it is not necessary to secure a space for the control unit in the gantry, which is advantageous for downsizing the apparatus.

Alternatively, in the charged particle beam irradiation apparatus according to the present invention, the charged particle beam irradiation apparatus further includes a PET apparatus having a PET camera that detects gamma rays generated inside the irradiated object, and the second control unit that controls the PET camera includes: You may install between the overhang | projection part and the counterweight on the outer periphery.
According to the charged particle beam irradiation apparatus according to the present invention, since the second control unit is installed between the overhanging part of the transport line and the counterweight, the empty space on the outer periphery of the gantry can be efficiently used. This is advantageous for downsizing the apparatus.

In the charged particle beam irradiation apparatus according to the present invention, the second control unit of the PET apparatus has the outermost end farthest from the central axis of the overhanging portion as viewed from the extending direction of the central axis, It may be within the rotation orbit drawn as the center.
According to the charged particle beam irradiation apparatus according to the present invention, the second control unit is placed inside the rotation orbit drawn by the outermost end of the overhanging portion, so the second control unit is arranged on the outer periphery of the gantry. As a result, the apparatus can be prevented from being enlarged in the radial direction.

  ADVANTAGE OF THE INVENTION According to this invention, a charged particle beam irradiation apparatus with high maintainability can be provided.

It is a schematic block diagram of the proton beam treatment system provided with the proton beam treatment apparatus which concerns on this embodiment. It is a front view of the proton beam therapy apparatus concerning this embodiment. It is a rear view of the proton beam therapy apparatus concerning this embodiment. It is a right view of the proton beam therapy apparatus which concerns on this embodiment. It is a left view of the proton beam therapy apparatus concerning this embodiment. It is a perspective view which shows the proton beam therapy apparatus which concerns on this embodiment from diagonally backward. It is the schematic sectional drawing which cut the gantry of the proton beam treatment apparatus concerning this embodiment horizontally along the central axis. It is a perspective view which shows the beam transport line and beam irradiation nozzle which were attached to the gantry. It is a front view of the beam irradiation nozzle of the proton beam therapy apparatus concerning this embodiment. It is a front view of the controller gathering part of the proton beam therapy apparatus concerning this embodiment.

  Hereinafter, a preferred embodiment of a charged particle beam irradiation apparatus according to the present invention will be described with reference to the drawings. In addition, the size, the shape, and the magnitude relationship between components in each drawing are not necessarily the same as an actual product.

  In the present embodiment, a proton beam therapy system including a proton beam therapy apparatus (charged particle beam irradiation apparatus) will be described. The proton beam treatment apparatus is applied to cancer treatment, for example, and is an apparatus that irradiates a tumor (irradiated body) in a patient's body with a proton beam (charged particle beam).

  As shown in FIG. 1, a proton beam treatment system 1 includes a cyclotron (accelerator) 2 that generates a proton beam, a beam transport line 3 that transports a proton beam emitted from the cyclotron 2, and a proton transported by the beam transport line 3. It has a proton beam treatment apparatus 10 that irradiates a patient's tumor with a beam. Each device of the proton beam treatment system 1 is accommodated in the building 5.

  The proton beam accelerated by the cyclotron 2 is deflected along the beam transport line 3 and supplied to the proton therapy apparatus 10. The beam transport line 3 is provided with a deflection electromagnet for deflecting the path of the proton beam, a quadrupole electromagnet for performing beam shaping, and the like.

  As shown in FIG. 2 to FIG. 8, the proton therapy apparatus 10 includes a beam introduction line 31 that is introduced by the beam transport line 3 and transports the proton beam, and a proton beam transported by the beam introduction line 31 to the irradiation object. A beam irradiation nozzle 11 for irradiation, and a gantry 12 for supporting the beam introduction line 31 and the beam irradiation nozzle 11 are provided.

  As shown in FIG. 7, the gantry 12 is configured to be rotatable about a predetermined central axis P, and has a cylindrical main body portion 13, a cone portion 14, and a second cylindrical portion 15. The cylindrical main body portion 13, the cone portion 14, and the second cylindrical portion 15 are disposed along the central axis P and are connected to each other. Hereinafter, the side on which the cylindrical main body 13 is disposed is described as the front side of the gantry 12, and the side on which the second cylindrical portion 15 is disposed is described as the back side of the gantry 12.

  The cylinder body 13 and the second cylinder 15 are thin-walled cylindrical bodies. The second cylindrical portion 15 has a smaller diameter than the cylindrical main body portion 13, and the cylindrical main body portion 13 and the second cylindrical portion 15 are connected by a cone portion 14 whose diameter decreases from the cylindrical main body portion 13 toward the second cylindrical portion 15. ing.

  Ring portions 13 a and 13 b surrounding the outer periphery of the cylindrical main body portion 13 are provided outside the cylindrical main body portion 13. As shown in FIGS. 2 to 5, the cylindrical main body 13 is supported by a roller device 20 disposed below so as to be rotationally driven. The roller device 20 functions as a driving unit for driving the gantry 12 to rotate.

  An irradiation chamber 21 for irradiating (treating) proton beams is formed in the cylindrical main body 13. The irradiation chamber 21 can be entered from the front side of the cylindrical body 13. On the other hand, a back panel 16 that divides the irradiation chamber 21 is provided on the back side of the cylindrical main body 13. A treatment table 22 on which a patient lies can be placed in the irradiation chamber 21. The treatment table 22 is movable by a robot arm 23. During normal times when treatment is not performed, the treatment table 22 is disposed outside the gantry 12 (irradiation chamber 21), and the treatment table 22 is disposed within the irradiation chamber 21 when treatment is performed.

  The irradiation nozzle 11 is fixed to the inner surface side of the cylindrical main body 13 and rotates around the central axis P together with the cylindrical main body 13. The irradiation nozzle 11 moves along with the rotation of the cylindrical main body 13, and the emission direction of the proton beam is changed.

  A beam introduction line 31 that is a beam transport line of the proton beam treatment apparatus 10 is connected to the beam transport line 3 that transports the proton beam emitted from the cyclotron 2, and the proton beam transported by the beam transport line 3 is irradiated with the proton nozzle 11. To introduce.

  FIG. 8 is a perspective view showing the beam introduction line 31 and the irradiation nozzle 11 attached to the gantry 12. The beam introduction line 31 is provided on the downstream side of the first bend section 32 and the first bend section 32 for deflecting the traveling direction of the proton beam traveling in the extending direction of the central axis P of the gantry 12. An inclined portion 33 that advances while being inclined with respect to the extending direction of the axis P, and a second bend portion 34 that is provided downstream of the inclined portion 33 and deflects the traveling direction of the proton beam B in a direction orthogonal to the central axis P. And a third bend portion 35 provided downstream of the second bend portion 34 for turning the traveling direction of the proton beam B around the central axis P, and provided downstream of the third bend portion 35 and irradiating the proton beam B. A straight line portion 36 that travels above the nozzle 11 (upward in the state shown in FIG. 2), and a fourth bend portion that is provided downstream of the straight line portion 36 and curves the proton beam B toward the axial center side (center axis P side). 37 and 4th Provided disposed downstream of de unit 37, a straight portion 38 to advance the proton beam B to the irradiation nozzle 11, a.

  The first bend portion 32 is configured by a bending electromagnet that curves the proton beam B and deflects the traveling direction by 45 °. The inclined portion 33 is configured to include optical elements such as a quadrupole electromagnet 41, a steering electromagnet 42, and a profile monitor 43. The quadrupole electromagnet 41 has a function of adjusting the size at the irradiation position of the proton beam B and the optical focal position. The steering electromagnet 42 has a function of translating the beam axis. The profile monitor 43 has a function of detecting the shape and position of the passing proton beam B.

  The second bend portion 34 is configured by a 45 degree deflection electromagnet that curves the proton beam B and deflects the traveling direction by 45 degrees. A profile monitor 43 is disposed between the second bend part 34 and the third bend part 35. The third bend portion 35 is configured by a 135-degree deflecting electromagnet that curves the proton beam B and deflects the traveling direction by 135 degrees.

  The straight portion 36 includes a quadrupole electromagnet 41, a steering electromagnet 42, and a profile monitor 43. The fourth bend portion 37 is configured by a 135-degree deflecting electromagnet that curves the proton beam B and deflects the traveling direction by 135 degrees. The straight portion 38 includes a quadrupole electromagnet 41 and a profile monitor 43.

  Here, in the proton beam therapy apparatus 10 of the present embodiment, a part of the beam introduction line 31 attached to the gantry 12 is a cylinder of the gantry 12 (cylindrical main body portion 13, cone portion 14, second cylindrical portion 15). It is arranged through the inside. The proton beam B transported by the beam transport line 3 is introduced from the back side of the second cylindrical portion 15 into the inside and passes through the second cylindrical portion 15, the cone portion 14, the back panel 16 and the cylindrical main body portion 13. Then, it passes through the cylindrical main body 13 and is led out of the cylindrical main body 13.

  The gantry 12 includes first to third support members 51 to 53 that support the beam introduction line 31. The first bend portion 32 is fixed to the second cylindrical portion 15 by the first support member 51, and is fixed to the cone portion 14 by the second support member 52. The inclined portion 33 is fixed to the cone portion 14 by the third support member 53. The second bend portion 34 penetrates the cylindrical main body portion 13 and is supported by the cylindrical main body portion 13.

  The beam introduction line 31 passes through the back panel 16 and enters the cylindrical main body 13 and is disposed so as to pass through the irradiation chamber 21. The gantry 12 includes a casing 55 that accommodates the beam introduction line 31 that passes through the interior of the gantry 12. The casing 55 is disposed along the beam introduction line 31 and covers the beam introduction line 31. The casing 55 is fixed to the cylindrical main body part 13, the cone part 14, and the second cylindrical part 15 via the first to third support members 51 to 53 or directly. Moreover, it is preferable that the casing 55 is comprised with shielding materials (for example, polyethylene, lead, stainless steel, etc.) which shield radiations, such as a neutron beam.

  A part of the beam introduction line 31 protrudes from the outer periphery of the gantry 12 and projects in the radial direction of the gantry 12. A portion projecting from the outer periphery of the gantry 12 is referred to as a beam introduction line projecting portion 31a. The beam introduction line projecting portion 31 a includes a third bend portion 35, a straight portion 36, and a fourth bend portion 37. The beam introduction line projecting portion 31 a is supported on the cylindrical main body portion 13 by the support base 17.

  A counterweight 18 for balancing the weight of the gantry 12 is attached on the outer periphery of the gantry 12. The counterweight 18 is disposed at a position facing the beam introduction line projecting portion 31a with the central axis P interposed therebetween. By having the counterweight 18, stable rotation driving of the gantry 12 can be achieved.

  As shown in FIG. 9, the proton beam therapy apparatus 10 is provided with an X-ray imaging apparatus (X-ray image acquisition means) 60 that acquires an X-ray image around the tumor of the patient. The X-ray imaging apparatus 60 includes an X-ray irradiation unit 61 and an X-ray detection unit 62 that detects X-rays transmitted through the patient. The X-ray irradiation unit 61 and the X-ray detection unit 62 are disposed in the irradiation chamber 21 of the gantry 12 and rotate together with the gantry 12.

  The X-ray irradiation unit 61 is provided on the left and right of the casing 11 a of the irradiation nozzle 11 in the irradiation chamber 21. One X-ray irradiation unit 61 is provided on each of the left and right sides of the housing 11a, and each X-ray irradiation unit 61 irradiates the patient on the treatment table 22 with X-rays at an oblique angle of 45 °.

  The X-ray detection unit 62 is, for example, an FPD [Flat Panel Detector], and detects X-rays irradiated by the X-ray detection unit 62. Two X-ray detection units 62 are arranged so as to be paired with each X-ray irradiation unit 61, and the X-ray detection unit 62 and the X-ray irradiation unit 61 face each other with the treatment table 22 interposed therebetween.

  The X-ray imaging apparatus 60 includes an image processing unit, a recording unit, a display unit, and the like that are not shown. The image processing unit performs image processing based on the detection result of the X-ray detection unit 62 and generates an X-ray image. The recording unit records the generated X-ray image. The generated X-ray image is displayed on the display unit. As described above, the X-ray imaging apparatus 60 acquires the X-ray image of the patient based on the detection result of the X-ray detection unit 62 and displays it on the display unit.

  In addition, the proton beam treatment apparatus 10 includes a PET [Positron Emission Tomography] apparatus 70 for accurately measuring the position of the tumor in the patient. The PET apparatus 70 has a pair of PET cameras 71 provided near the irradiation nozzle 11.

  The pair of PET cameras 71 are configured to be movable up and down as indicated by an arrow A, and when used, the pair of PET cameras 71 are lowered to a position where the patient on the treatment table 22 is sandwiched left and right. In this state, the PET camera 71 detects annihilation gamma rays generated from the patient's tumor. Specifically, a radiopharmaceutical (for example, 11C methionine) accumulated in a tumor is administered (injected) to a patient, and the PET camera 71 detects annihilation γ rays generated from the tumor (position where the radiopharmaceutical reaches).

  In addition to the PET camera 71, the PET apparatus 70 includes an image processing unit, a recording unit, a display unit, and the like (not shown). The image processing unit generates a PET image based on the image information acquired by the PET camera 71. The recording unit records the generated PET image. The generated PET image is displayed on the display unit. The PET device 70 measures the position of the tumor based on the detection result of annihilation γ rays.

  As shown in FIGS. 2, 3, 5, and 6, the proton beam therapy apparatus 10 includes a controller assembly unit 80 that collects controllers used to control the irradiation nozzle 11 and the X-ray imaging apparatus 60. The controller assembly 80 is installed on the outer periphery of the gantry 12 by a support frame 81. The controller assembly 80 is rotated together with the gantry 12 and can change its position by rotating the gantry 12.

  The controller assembly 80 is installed at a position on the right side of the gantry 12 when the beam introduction line projecting portion 31a is located directly above the front view of the gantry 12 shown in FIG. The controller assembly 80 is installed at a position on the left side of the gantry 12 when the beam introduction line projecting portion 31a is located directly above the front view of the gantry 12 shown in FIG. May be.

  The controller assembly 80 is installed on the outer periphery of the gantry 12 between the beam introduction line extension 31 a and the counterweight 18. The beam introduction line projecting portion 31a and the counterweight 18 are arranged at positions different by 180 ° around the central axis P. The controller assembly 80 is arranged around the central axis P at a position that is 90 ° different from the beam introduction line extension 31 a or the counterweight 18.

  Further, the controller assembly 80 has an outermost end farthest from the central axis P in the beam introduction line projecting portion 31a when viewed from the front direction of the gantry 12 shown in FIG. 2 (the direction in which the central axis P extends). F is inside the rotation orbit C drawn around the central axis P. In other words, the end portion of the proton beam therapy apparatus 10 that is farthest from the central axis P is configured to be the outermost end F of the beam introduction line projecting portion 31a, not the controller assembly portion 80.

  FIG. 10 shows the configuration of the controller assembly 80 and the support frame 81. As shown in FIG. 10, the support frame 81 has a pair of upper and lower connecting portions 82 and a frame body 83 connected to the gantry 12 by the connecting portions 82. The connecting portion 82 connects the gantry 12 and the frame body 83 with bolts. Each device constituting the controller assembly 80 is fixed to the frame 83.

  The controller assembly 80 includes a distribution board 84, a monitor distribution board 85, a profile monitor controller 86, a first dose monitor controller 87, a second dose monitor controller 88, an X-ray imaging controller (first controller). Controller 89, a PET controller (second controller) 90, and the like. Note that the configuration of the controller assembly unit 80 is not limited to that described above, and for example, a flatness monitor controller may be added.

  The profile monitor controller 86, the first dose monitor controller 87, and the second dose monitor controller 88 control various monitors (not shown) disposed in the irradiation nozzle 11. When these controllers 86 to 88 receive detection signals from various monitors, the state of the proton beam passing through the irradiation nozzle 11 is detected.

  The X-ray imaging controller 89 is a controller constituting the X-ray imaging apparatus 60. The X-ray imaging controller 89 performs irradiation control of the X-ray irradiation unit 61 and detection control of the X-ray detection unit 62. The X-ray imaging controller 89 does not necessarily need to control both the X-ray irradiation unit 61 and the X-ray detection unit 62, and may control only one of them. In addition, control is performed in cooperation with a control device or the like that is provided separately from a single unit. For example, calculation processing for generating an X-ray image based on the detection signal is performed by a separate calculation device. In addition, the aspect which controls independently may be sufficient.

  The PET controller 70 is a controller constituting the PET apparatus 70. The PET controller 70 controls the PET camera 71. The PET controller 70 also performs control in cooperation with a separately provided control device or the like, but may be a mode in which control is performed alone.

  According to the proton beam treatment apparatus 10 described above, since the controller assembly 80 including the X-ray imaging controller 89 and the PET controller 90 is installed outside the gantry 12, the controller assembly 80 is Compared to the conventional configuration installed in the gantry 12, access to the controller assembly 80 during maintenance becomes easier. Moreover, since the position of the controller assembly 80 can be adjusted by the rotation of the gantry 12 by being installed on the outer periphery of the gantry 12, the maintainability of the controller assembly 80 can be greatly improved. In addition, it is not necessary to secure a space for the controller assembly 80 in the gantry 12, which is advantageous for downsizing the apparatus.

  According to this proton beam treatment apparatus 10, the third bend unit 35 and the fourth bend unit 37 deflect the proton beam in the radial direction of the gantry 12, so that the conventional gantry (charged particle beam in the direction in which the central axis P extends). The length of the gantry 12 in the extending direction of the central axis P can be shortened as compared with the gantry that deflects. When the length of the gantry 12 in the extending direction of the central axis P is shortened, the space on the back side in the gantry 12 is narrowed. If the controller assembly 80 is to be accommodated in this narrow space, the gantry 12 is purposely moved. It will be necessary to lengthen it. According to this proton beam therapy apparatus 10, the controller assembly 80 is disposed on the outer periphery of the gantry 12, thereby suppressing the length of the gantry 12 in the extending direction of the central axis P and controlling the controller assembly 80. Can be provided.

  In addition, according to the proton beam treatment apparatus 10, the inclined portion 33 of the transport line 3 that is separated from the central axis P in the radial direction of the gantry 12 passes through the cylindrical body (for example, an enclosure or an irradiation chamber) of the gantry 12. Therefore, the apparatus can be reduced in size (short axis) compared to the case where the transportation line 3 is disposed avoiding the cylinder.

  Furthermore, according to this proton beam treatment apparatus 10, since the controller assembly 80 is installed between the beam introduction line extension 31a and the counterweight 18, the empty space on the outer periphery of the gantry 12 is efficiently used. This is advantageous for downsizing the apparatus.

  Moreover, according to this proton beam therapy apparatus 10, since the controller assembly 80 is housed inside the rotation orbit C drawn by the outermost end F of the beam introduction line extension 31a, the controller assembly 80 is removed from the outer periphery F. It is possible to avoid an increase in the size of the device in the radial direction due to the arrangement in the configuration.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. For example, the present invention can be suitably applied to various well-known charged particle beam irradiation apparatuses, not a proton beam therapy apparatus (cork screw type proton therapy apparatus) having a specific configuration capable of shortening the axis. .

  Further, the configuration of the controller assembly 80 is not limited to that described above. The monitor controllers 86 to 88 and the PET controller 90 may be installed in a place different from the gantry 12. In addition, when the proton beam treatment apparatus 10 does not include the PET apparatus 70, it is naturally not necessary to include the PET controller 90.

  Furthermore, the shape and dimensions of the controller assembly 80 are not limited to those described above. The size of the controller assembly 80 is such that it does not protrude from the gantry 12 in the extending direction of the central axis P, but fits inside the rotary track C in the direction perpendicular to the central axis P (the radial direction of the gantry 12). It ’s fine. Further, the arrangement of the controller assembly 80 is not limited to that described above. The controller assembly 80 only needs to be installed on the outer periphery of the gantry 12. When the controller assembly 80 is installed between the beam introduction line projecting portion 31 a and the counterweight 18, Also good.

  Further, the accelerator described in the claims is not limited to a cyclotron, and may be a synchrotron or a synchrocyclotron. The charged particle gland is not limited to a proton beam, and may be a carbon beam (heavy particle beam) or the like. Further, the cylinder of the gantry 12 is not limited to a cylinder, but may be another cylinder. The gantry 12 is not limited to the one that rotates 360 °, and may swing less than 360 °.

  Moreover, the structure by which the notch part was provided in a part of cylinder, for example, a side wall may be sufficient. The term “arranged so as to pass through the cylinder” includes that in which the beam introduction line 31 is arranged in a notch provided in the cylinder.

  Moreover, the structure by which the notch part was provided in the back panel may be sufficient. Note that the phrase “arranged so as to pass through the back panel” includes that in which the beam introduction line 31 is disposed in a notch provided in the back panel. It is only necessary that the beam introduction line 31 is arranged so as to pass through a notch or an opening provided in the back panel.

  Moreover, in the said embodiment, although the inclination part is formed in linear form, the inclination part which curves gently, for example may be sufficient.

  Further, a support frame that supports the X-ray imaging controller and a support frame that supports the PET controller may be provided separately. In addition, the means for connecting the connecting portion 82 of the support frame 81 to the gantry 12 and the frame body 83 is not limited to bolts, and may be welding or integral molding. Further, the connecting portion 82 is not necessarily required, and the frame body 83 may be directly connected to the gantry 12.

  DESCRIPTION OF SYMBOLS 1 ... Proton beam treatment system 2 ... Cyclotron 3 ... Beam transport line 5 ... Building 10 ... Proton beam treatment device (charged particle beam irradiation device) 11 ... Irradiation nozzle (irradiation part) 12 ... Gantry 16 ... Back panel 21 ... Irradiation chamber 31 ... Beam introduction line (transport line) 31a ... Beam introduction line projecting part 32 ... First bend part (first deflection part) 33 ... Inclined part 34 ... Second bend part (second deflection part) 35 ... Third bend part (3rd deflection | deviation part) 36 ... Linear part 37 ... 4th bend part (4th deflection | deviation part) 38 ... Linear part 51-53 ... Supporting member 55 ... Casing 60 ... Radiography apparatus 61 ... X-ray irradiation part 62 ... X-ray | X_line Detection unit 70 ... PET apparatus 71 ... PET camera 80 ... Controller assembly unit 81 ... Support frame 84 ... Distribution panel 85 ... Monitor distribution panel 86 ... Profile monitor control Device 87 ... First dose monitor controller 88 ... Second dose monitor controller 89 ... X-ray imaging controller (first control unit) 90 ... PET controller (second control unit) F ... Outermost end C ... Rotating orbit B ... Proton beam P ... Center axis.

Claims (6)

A charged particle beam irradiation apparatus for irradiating an irradiated body with a charged particle beam,
An accelerator for accelerating charged particles and emitting the charged particle beam;
An irradiation unit that irradiates the charged particle beam toward the irradiated object; and
A transport line connecting the accelerator and the irradiation unit;
The irradiating unit is disposed, supports a part of the transportation line, and can be rotated or swung around a central axis,
An X-ray image acquisition unit that has an X-ray irradiation unit and an X-ray detection unit, and acquires an X-ray image of the irradiated object;
With
The transport line is
A first deflecting unit that deflects the charged particle beam traveling in the extending direction of the central axis;
A second deflection unit that is provided downstream of the first deflection unit and deflects the charged particle beam in a direction perpendicular to the central axis;
A third deflection unit provided on the downstream side of the second deflection unit and configured to turn the charged particle beam around the central axis;
A fourth deflecting unit provided on the downstream side of the third deflecting unit and deflecting the charged particle beam toward the central axis;
Have
A charged particle beam irradiation apparatus, wherein a first control unit that controls at least one of the X-ray irradiation unit and the X-ray detection unit is installed on an outer periphery of the gantry. Further comprising a counterweight attached on the outer periphery of the gantry,
The counterweight is attached to a position facing an overhanging portion protruding from the outer periphery of the gantry in the transport line,
The charged particle beam irradiation apparatus according to claim 1 , wherein the first control unit is installed between the overhanging unit and the counterweight. The first control unit has an outermost end that is farthest from the central axis among the overhanging portions as seen from the extending direction of the central axis, and is located inside a rotation track drawn around the central axis. The charged particle beam irradiation apparatus according to claim 2 , wherein: Further comprising a PET apparatus having a PET camera for detecting gamma rays generated inside the irradiated body;
The charged particle beam irradiation apparatus according to claim 1 , wherein a second control unit that controls the PET camera is installed on an outer periphery of the gantry. Further comprising a PET apparatus having a PET camera for detecting gamma rays generated inside the irradiated body;
3. The charged particle beam irradiation according to claim 2 , wherein a second control unit for controlling the PET camera is installed between the projecting portion and the counterweight on the outer periphery of the gantry. apparatus. The second controller is configured such that, as viewed from the extending direction of the central axis, the outermost end farthest from the central axis of the overhanging portion is placed inside a rotation trajectory drawn around the central axis. The charged particle beam irradiation apparatus according to claim 5 .

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