Treatment preparation equipment and treatment facilities

Abstract

To provide: a treatment preparation device capable of positioning at a position where displacement is unlikely to happen during irradiation when positioning an object to be irradiated in a preparation room; and a treatment facility.SOLUTION: A treatment preparation device 100 includes periphery simulation means 102 which simulates a peripheral part 104 of an object 101 to be fixed after being arranged in an irradiation chamber 3 when fixing the object 101 to be fixed at a relative position to the object to be irradiated in the preparation chamber 10. Therefore, when positioning a patient Q in the preparation chamber 10, positioning is possible by considering the peripheral part 104 of the object 101 to be fixed in the irradiation chamber 3 by using the periphery simulation means 102. That is, in the preparation chamber 10, it is possible to fix the patient Q to a position where displacement is unlikely to happen in the irradiation chamber 3 by considering a positional relation between the patient Q and the peripheral part 104. Thus, it is possible to position the patient Q at a position where displacement is unlikely to happen during irradiation when positioning the patient in the preparation chamber 10.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a treatment preparation device and a treatment installation. [Background technology]

[0002] Conventionally, a treatment system using radiation is known, as described in Patent Document 1. The treatment system described in Patent Document 1 includes an irradiation room where radiation is irradiated, and a preparation room where the patient is positioned during irradiation. In the preparation room, the patient is positioned relative to a fixed object such as a bed, and the patient is fixed to the fixed object. The patient is transported in this state together with the fixed object to the irradiation room, where the patient is irradiated with radiation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-288102 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, in the irradiation room, structures such as walls may be provided around fixed objects such as a bed and a collimator. Although such structures are not taken into consideration when aligning the irradiated object in the preparation room, when the irradiated object comes into contact with the structures in the irradiation room, the irradiated object may shift from the positioned state. Therefore, when positioning the irradiated object in the preparation room, it is required to position the irradiated object at a position that is unlikely to shift during irradiation.

[0005] The present invention has been made to solve such problems, and aims to provide a treatment preparation device and treatment equipment that can position an irradiated object in a preparation room in a position that is less likely to shift during irradiation. [Means for solving the problem]

[0006] The treatment preparation device of the present invention is a treatment preparation device that is provided in a preparation room for preparing for irradiation in an irradiation room to irradiate an irradiated object, and is equipped with a fixed object that fixes its relative position with respect to the irradiated object, and a peripheral simulation means that simulates the peripheral part of the fixed object after the fixed object is placed in the irradiation chamber when fixing the relative position between the fixed object and the irradiated object in the preparation room.

[0007] The treatment preparation device includes a fixed object that fixes the relative position with respect to the irradiated object in the irradiation room. Therefore, the irradiated object can be positioned relative to the fixed object in the preparation room so that the irradiated object can be treated at an appropriate position during irradiation. Here, the treatment preparation device includes a peripheral simulation means that simulates the peripheral part of the fixed object after the fixed object is placed in the irradiation room when fixing the relative position between the fixed object and the irradiated object in the preparation room. Therefore, when positioning the irradiated object in the preparation room, the peripheral simulation means can be used to perform positioning while taking into account the peripheral part of the fixed object in the irradiation room. That is, in the preparation room, the irradiated object can be fixed at a position where it is unlikely to shift in the irradiation room after taking into account the positional relationship between the irradiated object and the peripheral part. As described above, when positioning the irradiated object in the preparation room, it can be positioned at a position where it is unlikely to shift during irradiation.

[0008] The surroundings simulation means may be a structure that simulates the surroundings. In this case, the surroundings simulation means can simulate the surroundings with high reproducibility by using the structure.

[0009] The structure of the peripheral simulation means may be movable relative to the fixed object. In this case, the positioning of the irradiated object near the peripheral portion can be completed first, and then the structure can be withdrawn from the vicinity of the fixed object, so that the positioning of the other portions of the irradiated object can be performed in a state that is easy to work on.

[0010] The surroundings simulation means may have a sensor that detects contact with a structure and an output unit that outputs the detection result by the sensor. In this case, an operator performing positioning can easily grasp that the irradiated object has contacted the structure.

[0011] The structure may have a through-hole corresponding to the irradiation path in the irradiation chamber. In this case, an operator who performs positioning can grasp the state of the irradiated object through the through-hole even if the structure is provided near the fixed object.

[0012] The surroundings simulation means may simulate the surroundings by a non-physical means. In this case, the surroundings simulation means can easily simulate the surroundings without providing a large-scale structure in the preparation room.

[0013] The peripheral simulation means may have a sensor that detects the simulated contact of the irradiated object with the peripheral portion, and an output unit that outputs the detection result by the sensor. In this case, the operator performing the positioning can easily grasp that the irradiated object has simulated contact with the peripheral portion.

[0014] The non-physical means may be light of a different color from the light for confirming the irradiation position of the irradiated object, in which case it is possible to prevent an operator performing positioning from confusing the light for confirming the irradiation position with the light simulating the periphery.

[0015] The fixed object may be selected from a collimator, a bed, a chair, and an auxiliary fixing unit. In this case, an appropriate fixed object can be selected according to the posture of the irradiation target in the irradiation room.

[0016] The treatment equipment of the present invention comprises an irradiation room equipped with an irradiation device that irradiates an irradiated object with neutron beams, a preparation room for preparing for irradiation in the irradiation room, a fixed object that is movable between the preparation room and the irradiation room and fixes its relative position with respect to the irradiated object, and a peripheral simulation means that simulates the peripheral part of the fixed object after it is placed in the irradiation room when fixing the relative position of the fixed object with respect to the irradiated object in the preparation room.

[0017] This treatment equipment can provide the same functions and effects as the above-mentioned treatment preparation device. Effect of the Invention

[0018] According to the present invention, it is possible to provide a treatment preparation device and treatment equipment that can position an irradiated object in a preparation room at a position that is unlikely to shift during irradiation. [Brief description of the drawings]

[0019] [Figure 1] 1 is a schematic configuration diagram of a neutron capture therapy system to which a treatment preparation device according to an embodiment of the present invention is applied. [Diagram 2] FIG. 2 is a schematic diagram showing the configuration of an irradiation chamber. [Diagram 3] FIG. 2 is a schematic diagram showing a treatment preparation device. [Figure 4] FIG. 13 is a schematic diagram showing a treatment preparation device according to a modified example. [Diagram 5] FIG. 13 is a schematic diagram showing a treatment preparation device according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are given the same reference numerals and duplicated explanations will be omitted.

[0021] A treatment preparation device according to an embodiment of the present invention is used in a neutron capture therapy system. Therefore, first, a schematic configuration of the neutron capture therapy system will be described, and then the treatment preparation device will be described. In the description of the drawings, the same elements are given the same reference numerals, and duplicated descriptions will be omitted. As shown in each drawing, an X direction, a Y direction, and a Z direction that are orthogonal to each other may be set and used in the following description. In this case, the vertical direction is the Z direction, and the irradiation direction of the neutron beam N is the X direction.

[0022] First, the overall configuration of a neutron capture therapy system 1 will be described with reference to Figs. 1 and 2. The neutron capture therapy system 1 is a system that performs boron neutron capture therapy (BNCT). 10 This is a therapy in which a patient Q (irradiated subject) who has been administered a neutron beam is irradiated with neutrons to treat the patient's lesion (e.g., a tumor, etc.).

[0023] The treatment facility 200 includes an irradiation room 3 that accommodates a patient Q placed on a treatment table 2 and irradiates the patient Q with a neutron beam, an accelerator room 9 that accommodates an accelerator 5 that generates a charged particle beam P and a transport line 8 that transports the charged particle beam emitted from the accelerator 5 to a neutron beam generating unit 11 described below, and a neutron capture therapy system 1. The neutron capture therapy system 1 includes a neutron beam generating unit 11 that receives the charged particle beam from the transport line 8 and generates a neutron beam for irradiating the patient Q, and the accelerator 5. The neutron beam generating unit 11 constitutes an irradiation device 201 that irradiates the patient Q with a neutron beam. The accelerator 5 is, for example, a cyclotron, and accelerates charged particles (for example, protons) and emits the charged particle beam P (for example, a proton beam). The accelerator 5 has the ability to emit a charged particle beam P of 60 kW (=30 MeV×2 mA) with a beam radius of 40 mm, for example. The accelerator 5 is not limited to a cyclotron, and may be other accelerators such as a synchrotron, a linac, or an electrostatic accelerator. The irradiation chamber 3 and the accelerator chamber 9 are closed spaces surrounded by a shielding wall W, and the shielding wall W is a concrete wall for shielding radiation. The neutron beam generating unit 11 is disposed so as to be embedded in the shielding wall W that separates the irradiation chamber 3 and the accelerator chamber 9. The neutron beam generating unit 11 may be disposed in the irradiation chamber 3 without being embedded in the shielding wall W.

[0024] Furthermore, the treatment facility 200 includes a preparation room 10 adjacent to the irradiation room 3 in the Y direction. The preparation room 10 is isolated from the irradiation room 3 by a shielding wall W. A communication room 13 that allows passage between the irradiation room 3 and the preparation room 10 is provided penetrating the shielding wall W. An openable and closable shielding door 15 is provided at the boundary between the communication room 13 and the irradiation room 3 and at the boundary between the communication room 13 and the preparation room 10. The treatment table 2 is movable in the Y direction between the irradiation room 3 and the preparation room 10 through the communication room 13. In the preparation room 10, preparation work prior to treatment is performed. The preparation work includes, for example, work such as fixing (restraining) the patient Q in a predetermined posture relative to the treatment table 2.

[0025] As shown in FIG. 2, the neutron beam generating unit 11 includes a target T that generates a neutron beam N by being irradiated with a charged particle beam P, a moderator 17 that slows down (reduces the energy) the generated neutron beam N, and a shielding body 19 that covers at least a part of the periphery of the moderator 17 to shield radiation. The shielding body 19 blocks secondary radiation such as gamma rays generated by the moderator 17. The shielding body 19 has a through hole 19a formed therein to allow the neutron beam N to pass through. Note that the wall portion that separates the irradiation chamber 3 and the accelerator chamber 9, such as the shielding wall W, the moderator 17, and the shielding body 19, may be referred to as a partition wall 20. The neutron beam N emitted from the moderator 17 passes through a collimator 21 provided on the treatment table 2 and is irradiated to the patient Q. The collimator 21 can change the irradiation range of the neutron beam N irradiated to the patient Q. The collimator 21 is attached to a wall surface 20a of the partition 20 on the irradiation chamber 3 side. The partition 20 has an irradiation port 18, which is an opening for emitting the neutron beam N that has passed through the through hole 19a and irradiating the patient Q. The collimator 21 is attached to the irradiation port 18. In the example shown in FIG. 2, the collimator 21 is fitted into the irradiation port 18.

[0026] In Fig. 2, the patient Q on the treatment table 2 is in a supine position, but there are cases where the patient Q in a sitting position is irradiated with the neutron beam N (see Fig. 5 described later). Depending on the position of the lesion of the patient Q, the patient may be in a sitting position in order to bring the lesion closer to the collimator 21. In the following embodiment, a case where the patient Q in a sitting position is irradiated with the neutron beam N will be described.

[0027] In neutron capture therapy using neutron capture therapy system 1, a treatment plan is created that determines the distribution and intensity of neutron beams to be irradiated to patient Q. Since it is necessary to appropriately irradiate neutron beams to the lesion of patient Q, the posture of patient Q is also an important element in the treatment plan. Therefore, in preparation room 10 (see FIG. 1) shown in FIG. 1, adjustments are made so that the posture of patient Q during treatment in irradiation room 3 conforms to the plan.

[0028] Next, a treatment preparation device 100 according to this embodiment will be described with reference to Fig. 1 and Fig. 3. The treatment preparation device 100 is a device provided in a preparation room 10 for preparing for irradiation in an irradiation room 3 in which a neutron beam N is irradiated to a patient Q. As shown in Fig. 1 and Fig. 3, the treatment preparation device 100 includes a fixed object 101 and a surroundings simulation means 102.

[0029] The fixed object 101 is an object whose relative position with respect to the patient Q is fixed in the irradiation room 3. In this embodiment, the bed 30 of the treatment table 2 and the collimator 21 are selected as the fixed object 101. The bed 30 is a member on which the patient Q is placed while lying down. As shown in FIG. 3, the bed 30 is supported by a base part 31 via a support part 32. The base part 31 is arranged on the floor so as to be movable along a guide part 33. The guide part 33 extends from the preparation room 10 through the communication room 13 to the irradiation room 3. This allows the treatment table 2 having the bed 30 to move back and forth between the preparation room 10 and the irradiation room 3 along a moving path M1 (see FIG. 1) that passes through the communication room 13.

[0030] The support part 32 extends upward from the base part 31 and supports the bed 30 at its upper end. A support bar 34 supporting the collimator 21 is connected to the lower end of the support part 32. The bed 30, the collimator 21, the support part 32, and the support bar 34 can rotate in the XY plane while being supported by the base part 31. As shown in FIG. 1, during irradiation in the irradiation room 3, the bed 30 is disposed at an arbitrary angle relative to the collimator 21. Therefore, when positioning the patient Q in the preparation room 10, the bed 30 is disposed at an arbitrary angle relative to the collimator 21. When moving from the preparation room 10 to the irradiation room 3, the bed 30 rotates 90° so as to pass through the communication room 13, and is in a state in which the longitudinal direction is in the Y-axis direction.

[0031] As shown in FIG. 3, the periphery simulation means 102 simulates a periphery 104 of the fixed object 101 after the fixed object 101 is placed in the irradiation chamber 3 when the fixed object 101 is fixed in a relative position with the patient Q in the preparation room 10. The periphery 104 of the fixed object 101 is an object present around the fixed object 101, and is an object that may come into contact with the patient Q when the patient Q changes his / her posture or stretches his / her hand. In this embodiment, the partition wall 20 present around the collimator 21 and the bed 30 corresponds to the periphery 104 (see FIG. 2). The periphery 104 includes a wall surface 20a that is a portion extending from the collimator 21 in a direction (Y-axis direction, Z-axis direction) intersecting the irradiation direction (X-axis direction) in the irradiation chamber 3. The periphery simulation means 102 is constituted by a simulated wall structure 40 that is a structure that simulates the partition wall 20 (see FIG. 2). The simulated wall structure 40 does not need to simulate the entire partition 20, but only needs to simulate at least a portion of the partition 20 that may come into contact with the patient Q. Therefore, the simulated wall structure 40 has a wall surface 40a that simulates the wall surface 20a of the partition 20 in the area around the mounting position of the collimator 21. The height and thickness of the simulated wall structure 40 are smaller than those of the partition 20. Moreover, the simulated wall structure 40 is provided only in a portion around the bed 30 in the Y-axis direction (see FIG. 1).

[0032] The simulated wall structure 40 of the surrounding simulation means 102 is movable relative to the fixed object 101. The simulated wall structure 40 is movable back and forth in the X-axis direction, and is disposed in a position close to the collimator 21 when positioning the patient Q, and can be moved away from the collimator 21 to the negative side in the X-axis direction when positioning is completed. The simulated wall structure 40 has a moving mechanism 41 such as wheels that can run on the floor. The wheels of the moving mechanism 41 may be configured to switch between contact and non-contact with the floor surface by operating a lever or the like.

[0033] The surrounding simulation means 102 may have a sensor 42 that detects contact with the simulated wall structure 40, and an output unit 43 that outputs the detection result by the sensor 42. The sensor 42 is not particularly limited in type as long as it can detect that the patient Q has contacted the simulated wall structure 40, and a non-contact sensor (a sensor using light such as a laser, ultrasonic waves, radar, radio waves, etc.) or a contact sensor (a sensor using pressure detection, etc.) may be used. The output unit 43 may output a warning sound or output warning content to a monitor when the patient Q has contacted the simulated wall structure 40. However, the output method and output content of the output unit 43 are not particularly limited as long as it is possible to know that the patient Q has contacted the simulated wall structure 40.

[0034] The simulated wall structure 40 has a through-hole 44 corresponding to the irradiation path in the irradiation chamber 3. The through-hole 44 penetrates the simulated wall structure 40 in the X-axis direction at a position corresponding to the through-hole of the collimator 21. The through-hole 44 simulates the through-hole 19a (FIG. 2) of the shield 19 as an irradiation path for passing the neutron beam N in the partition wall 20. Of the through-hole 44, an opening 48 near the wall surface 40a simulates the irradiation port 18 (FIG. 2). In FIG. 3, the collimator 21 is attached to the simulated wall structure 40 in a manner such that it is pressed against the opening 48, but the collimator 21 may be attached to the simulated wall structure 40 in a manner such that it is fitted into the opening 48. The through-hole 44 is a portion that functions as a peephole during the positioning operation of the patient Q. Therefore, the through-hole 44 may be closed except when the positioning operation is being performed, and therefore a cover with a double-door structure may be provided.

[0035] Next, the action and effect of the treatment preparation device 100 according to this embodiment will be described.

[0036] The treatment preparation device 100 includes a fixed object 101 that fixes a relative position with respect to the patient Q in the irradiation room 3. Therefore, the position of the patient Q with respect to the fixed object 101 can be performed in the preparation room 10 so that the patient Q can be treated in an appropriate position during irradiation.

[0037] Here, as a comparative example, a neutron capture therapy system in which the preparation room 10 is not provided with the peripheral simulation means 102 will be described. In this case, since the patient Q needs to maintain the same posture for a long time, the patient Q may try to take a comfortable posture. For example, the patient Q may move a body part other than the affected part. For example, the patient Q may place his / her arm on the collimator 21. If the patient Q is transported to the irradiation room 3 together with the fixed object 101 in this state, the arm of the patient Q may come into contact with the partition wall 20, and the irradiation position may be shifted. If the patient Q is shifted in this way, it becomes necessary for an operator to enter the irradiation room 3 to perform positioning work.

[0038] In contrast, the treatment preparation device 100 according to the present embodiment includes a peripheral simulation means 102 that simulates the peripheral portion 104 of the fixed object 101 after the fixed object 101 is placed in the irradiation chamber 3 when the fixed object 101 is fixed in a relative position with the irradiated object in the preparation room 10. Therefore, when positioning the patient Q in the preparation room 10, the peripheral simulation means 102 can be used to perform positioning while taking into consideration the peripheral portion 104 of the fixed object 101 in the irradiation chamber 3. That is, in the preparation room 10, the patient Q can be fixed in a position where it is unlikely to shift in the irradiation chamber 3 while taking into consideration the positional relationship between the patient Q and the peripheral portion 104. As described above, when positioning the patient Q in the preparation room 10, it is possible to position the patient Q in a position where it is unlikely to shift during irradiation. This eliminates the need for an operator to enter the irradiation chamber 3 to perform positioning work, thereby reducing exposure to radiation.

[0039] The periphery simulation means 102 may be a simulated wall structure 40 that simulates the periphery 104. In this case, the periphery simulation means 102 can simulate the partition wall 20, which is the periphery 104, with high reproducibility by using the simulated wall structure 40.

[0040] The simulated wall structure 40 of the periphery simulation means 102 may be movable relative to the fixed object 101. In this case, the positioning of the patient Q near the periphery 104 is completed first, and then the simulated wall structure 40 is withdrawn from near the fixed object 101, so that other parts of the patient Q can be positioned in a state that makes it easier to perform the work.

[0041] The surroundings simulation means 102 may have a sensor 42 that detects contact with the simulated wall structure 40, and an output unit 43 that outputs the detection result by the sensor 42. In this case, the operator performing the positioning can easily know that the patient Q has contacted the simulated wall structure 40.

[0042] The simulated wall structure 40 may have a penetration part 44 corresponding to the irradiation path in the irradiation room 3. In this case, even if the simulated wall structure 40 is provided near the fixed object 101, the operator performing the positioning can grasp the state of the patient Q through the penetration part 44.

[0043] The treatment facility 200 comprises an irradiation room 3 equipped with an irradiation device 201 that irradiates an irradiated object with neutron beams, a preparation room 10 for preparing for irradiation in the irradiation room 3, a fixed object 101 that is movable between the preparation room 10 and the irradiation room 3 and fixes its relative position with respect to the irradiated object, and a peripheral simulation means 102 that simulates the peripheral portion 104 of the fixed object 101 after the fixed object 101 is placed in the irradiation room 3 when fixing the relative position of the fixed object 101 with respect to the irradiated object in the preparation room 10.

[0044] According to this treatment equipment 200, it is possible to obtain the same functions and effects as the treatment preparation device 100 described above.

[0045] In neutron capture therapy, in order to increase the effective dose, it is desirable to place the patient as close as possible to the collimator 21. The collimator 21 may be disposed so as to be embedded in the wall during treatment. In that case, body parts other than the treatment area (such as the arms) may hit the wall, causing the irradiation position to shift. Therefore, a means is provided for imitating the peripheral shape of the object to which the patient is fixed. Therefore, the patient (and other parts besides the affected area) can be positioned so that the affected area does not shift position during treatment.

[0046] In the case where the treatment facility 200 employs a treatment process that includes the steps from the preparation room 10 to the irradiation room 3, immobilization is completed at the treatment preparation stage, so that the worker does not need to enter the treatment room, and low radiation exposure can be achieved. Without this means, the worker would end up having to enter the treatment room to perform immobilization work.

[0047] The present invention is not limited to the above-described embodiments.

[0048] For example, as shown in FIG. 4, the periphery simulation means 102 may simulate the partition wall 20, which is the periphery 104, by a non-physical means. Specifically, the periphery simulation means 102 has an oscillator 51 that oscillates the non-physical means. The non-physical means is a means that can be used for various measurements and detections, such as colored light, ultrasonic waves, radar, and radio waves. In FIG. 4, colored light L1 is used as the non-physical means. The oscillator 51 oscillates the colored light L1 so that the colored light L1 is arranged at a position corresponding to the wall surface 20a of the partition wall 20. The oscillator 51 may be attached in any manner in the preparation room 10, for example, it may be attached to the ceiling or wall of the preparation room 10, may be attached to a dedicated jig, or may be attached to the fixed object 101. A plurality of oscillators 51 may be provided so that the colored light L1 is arranged at a predetermined pitch at a position corresponding to the wall surface 20a. Although the colored light L1 is oscillated from top to bottom, it may be oscillated from bottom to top, or may be oscillated in a horizontal or oblique direction. Alternatively, when the oscillator 51 is provided in the collimator 21, the colored light L1 may be oscillated radially from the central axis of the collimator 21. The surroundings simulation means 102 may simulate the partition wall 20 within a range in which the body part of the patient Q can be moved while the affected part of the patient Q is fixed to the collimator 21, for example.

[0049] As described above, the periphery simulation means 102 may simulate the periphery 104 by a non-physical means. In this case, the periphery simulation means 102 can easily simulate the periphery 104 without providing a large-scale structure in the preparation room 10.

[0050] The periphery simulation means 102 may have a sensor 52 that detects that the patient Q has come into simulated contact with the periphery 104, and an output unit 53 that outputs the detection result by the sensor 52. In this case, the operator performing positioning can easily grasp that the patient Q has come into simulated contact with the periphery 104. The sensor 52 is provided at a position facing the oscillator 51, and is provided on the floor in the example shown in FIG. 4. The sensor 52 and the output unit 53 may be omitted. For example, in the case where the colored light L1 is used as the non-physical means, the operator can grasp that the patient Q has come into simulated contact with the periphery 104 by checking that the colored light L1 is interrupted by being blocked by the patient Q.

[0051] The colored light L1, which is a non-physical means, may be a light of a different color from the light L2 for confirmation of the irradiation position of the patient Q. In this case, it is possible to prevent the operator performing positioning from confusing the light L2 for confirmation of the irradiation position with the colored light L1 simulating the peripheral area 104.

[0052] Here, the fixed object 101 may be selected from a collimator, a bed, a chair, and an auxiliary fixing unit. In this case, an appropriate fixed object 101 can be selected according to the posture of the patient Q in the irradiation room 3. In the above-mentioned embodiment, the collimator and the bed were selected as the fixed object 101 because the treatment is performed with the patient Q in a supine position. On the other hand, when the treatment is performed with the patient Q in a sitting position, a chair may be selected as the fixed object 101 instead of the bed, and further an auxiliary fixing unit may be selected.

[0053] Specifically, a treatment preparation device 100 as shown in Fig. 5 may be adopted. As shown in Fig. 5, the collimator 21 and the chair 130 are selected as the fixed object 101, and the waist support member 131, the chin rest member 132, and the armrest member 133 that serve as the auxiliary fixing part are adopted. The collimator 21, the waist support member 131, the chin rest member 132, and the armrest member 133 are supported by a support member not shown, and can be moved to the irradiation room 3 together with the chair 130. The simulated wall structure 140 has a wall surface 140a shaped to match the body part of the patient Q sitting on the chair 130. For example, the wall surface 140a has a recess at a position corresponding to the foot of the patient Q.

[0054] The radiation irradiated to the patient is not limited to neutron radiation, and the treatment preparation device of the present invention can be applied to any system that irradiates radiation while keeping the patient in a fixed position. [Explanation of symbols]

[0055] 3...irradiation room, 10...preparation room, 21...collimator, 30...bed, 40...simulated wall structure (structure), 42, 52...sensor, 43, 53...output section, 44...penetration section, 100...treatment preparation device, 101...fixed object, 102...periphery simulation means, 104...periphery, 130...chair, 131...lumbar support member (auxiliary fixing section), 132...chin rest member (auxiliary fixing section), 133...elbow support member (auxiliary fixing section), 200...treatment equipment, 201...irradiation device, Q...patient (irradiated body).

Claims

1. A treatment preparation device provided in a preparation room for preparing for irradiation in an irradiation room for irradiating an irradiation target with neutron beams, comprising: A fixing object that fixes a relative position with respect to the irradiation object; a peripheral simulation means for simulating a peripheral portion of the fixed object after the fixed object is placed in the irradiation chamber when fixing a relative position between the fixed object and the irradiation target in the preparation chamber, The peripheral simulation means is a structure simulating the peripheral area, The surroundings simulation means is a treatment preparation device having a sensor that detects contact with the structure, and an output unit that outputs the detection result by the sensor.

2. The treatment preparation device of claim 1 , wherein the structure of the peripheral simulation means is movable relative to the fixed object.

3. The treatment preparation device according to claim 1 or 2, wherein the structure includes a penetration portion corresponding to an irradiation path in the irradiation chamber.

4. A treatment preparation device provided in a preparation room for preparing for irradiation in an irradiation room for irradiating an irradiated object with neutron beams, comprising: A fixing object that fixes a relative position with respect to the irradiation object; a peripheral simulation means for simulating a peripheral portion of the fixed object after the fixed object is placed in the irradiation chamber when fixing a relative position between the fixed object and the irradiation target in the preparation chamber, A treatment preparation device, wherein the peripheral simulation means simulates the peripheral area by non-physical means.

5. 5. The treatment preparation device according to claim 4, wherein the peripheral simulation means comprises a sensor that detects simulated contact of the irradiated object with the peripheral portion, and an output unit that outputs a result of detection by the sensor.

6. 5. The treatment preparation device according to claim 4, wherein the non-physical means is light of a different color from a confirmation light for confirming the irradiation position of the irradiation subject.

7. The treatment preparation device according to any one of claims 1 to 3, wherein the fixed object is selected from a collimator, a bed, a chair, and an auxiliary fixing part.

8. an irradiation chamber including an irradiation device for irradiating an object to be irradiated with neutron beams; a preparation room for preparing for irradiation in the irradiation room; a fixed object that is movable between the preparation chamber and the irradiation chamber and fixes a relative position with respect to the irradiation object; and a peripheral simulation means for simulating a peripheral portion of the fixed object after the fixed object is placed in the irradiation chamber when fixing a relative position between the fixed object and the irradiated object in the preparation chamber, The peripheral simulation means is a structure simulating the peripheral area, The surroundings simulation means is a treatment facility having a sensor that detects contact with the structure, and an output unit that outputs the detection result by the sensor.

9. An irradiation chamber equipped with an irradiation device that irradiates a neutron beam to an irradiated object; a preparation room for preparing for irradiation in the irradiation room; a fixed object that is movable between the preparation chamber and the irradiation chamber and fixes a relative position with respect to the irradiation object; and a peripheral simulation means for simulating a peripheral portion of the fixed object after the fixed object is placed in the irradiation chamber when fixing a relative position between the fixed object and the irradiated object in the preparation chamber, A treatment facility, wherein the peripheral simulation means simulates the peripheral area by a non-physical means.

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