Treatment preparation device and treatment apparatus

Abstract

The present invention relates to a treatment preparation device and a treatment apparatus, which can be positioned on a position where deviation is less likely to occur at the time of irradiation when a subject to be irradiated is positioned in a preparation room. The treatment preparation device (100) is provided with a peripheral portion simulation mechanism (102) which simulates a peripheral portion (104) of a fixation object (101) after being arranged in an irradiation room (3) when fixing the relative position of the fixation object and the subject to be irradiated in a preparation room (10). Therefore, when positioning a patient (Q) in the preparation room, the positioning can be performed by taking into account the peripheral portion of the fixation object in the irradiation room by using the peripheral portion simulation mechanism (102). That is, in the preparation room, the patient is fixed on a position where deviation is less likely to occur in the irradiation room on the basis of taking into account the positional relationship between the patient and the peripheral portion. By the above, when positioning the patient in the preparation room, the patient can be positioned on a position where deviation is less likely to occur at the time of irradiation.

Description

TECHNICAL FIELD

[0001] This application claims priority based on Japanese Patent Application No. 2021-053309 filed on March 26, 2021. The entire contents of the Japanese application are incorporated herein by reference.

[0002] The present application relates to a treatment preparation device and a treatment apparatus. BACKGROUND

[0003] In the past, as a treatment system using a radiation, a treatment system described in Patent Literature 1 has been known. The treatment system described in Patent Literature 1 is provided with an irradiation room in which radiation irradiation is performed, and a preparation room in which positioning of a patient at the time of irradiation is performed. In the preparation room, the position of the patient with respect to a fixed object such as a bed is positioned, and the patient is fixed with respect to the fixed object. The patient is transported to the irradiation room together with the fixed object in this state and irradiated with radiation.

[0004] Patent Literature 1: Japanese Patent Application Publication No. 2000-288102

[0005] Here, in the irradiation room, a structure such as a wall is sometimes provided around the fixed object such as a bed or a collimator. Such a structure is not taken into consideration in the alignment of the irradiated body in the preparation room, and on the other hand, when the irradiated body comes into contact with the structure in the irradiation room, the irradiated body sometimes deviates from the positioned state. Therefore, when the irradiated body is positioned in the preparation room, it is required to be positioned on a position that is less likely to deviate at the time of irradiation. SUMMARY

[0006] The present application has been made to solve such a problem, and has an object to provide a treatment preparation device and a treatment apparatus, which, when an irradiated body is positioned in a preparation room, can be positioned on a position that is less likely to deviate at the time of irradiation.

[0007] The treatment preparation device of the present application is provided in a preparation room for preparing irradiation in an irradiation room for irradiating an irradiated body with radiation, and includes: a fixed object that fixes the relative position with the irradiated body; and a periphery simulation mechanism that simulates the periphery of the fixed object after the fixed object is arranged inside the irradiation room when the relative position of the fixed object and the irradiated body is fixed in the preparation room.

[0008] The treatment preparation device has a fixed object that fixes the relative position of the fixed object and the irradiated body in the irradiation room. Therefore, the positioning of the irradiated body relative to the fixed object in the preparation room can be performed in a manner that the irradiated body is in a proper position for treatment at the time of irradiation. Here, the treatment preparation device has a peripheral simulation mechanism that simulates the peripheral portion of the fixed object after the fixed object is arranged in the irradiation room when fixing the relative position of the fixed object and the irradiated body in the preparation room. Therefore, when the positioning of the irradiated body is performed in the preparation room, the positioning can be performed considering the peripheral portion of the fixed object in the irradiation room by using the peripheral simulation mechanism. That is, in the preparation room, the irradiated body can be fixed to a position that is less likely to deviate in the irradiation room based on the positional relationship between the irradiated body and the peripheral portion. By the above, when the irradiated body is positioned in the preparation room, the irradiated body can be positioned at a position that is less likely to deviate at the time of irradiation.

[0009] The peripheral simulation mechanism can be a structure that simulates the peripheral portion. At this time, the peripheral simulation mechanism can simulate the peripheral portion with high reproducibility using the structure.

[0010] The structure of the peripheral simulation mechanism can be movable relative to the fixed object. At this time, after the positioning of the irradiated body near the peripheral portion is first completed, the structure can be withdrawn from the vicinity of the fixed object, and the positioning of other portions of the irradiated body can be performed in a state in which work is easy.

[0011] The peripheral simulation mechanism can have a sensor that detects contact with the structure and an output portion that outputs the detection result of the sensor. At this time, a worker who performs the positioning can easily grasp the situation in which the irradiated body contacts the structure.

[0012] The structure can have a penetration portion corresponding to an irradiation path in the irradiation room. At this time, even if the structure is arranged in the vicinity of the fixed object, a worker who performs the positioning can grasp the situation of the irradiated body from the penetration portion.

[0013] The peripheral simulation mechanism can simulate the peripheral portion by a non-physical mechanism. At this time, even if a large-scale structure is not arranged in the preparation room, the peripheral simulation mechanism can easily simulate the peripheral portion.

[0014] The peripheral simulation mechanism has a sensor that detects contact of the irradiated body with the peripheral portion simulation and an output portion that outputs the detection result of the sensor. At this time, a worker who performs the positioning can easily grasp the situation in which the irradiated body contacts the peripheral portion simulation.

[0015] The non-physical mechanism can be light of a different color from the color of the light used for confirming the irradiation position of the irradiated body. In this case, the worker who performs the positioning can be prevented from confusing the light used for confirming the irradiation position with the light simulating the surrounding portion.

[0016] The fixation object can be selected from a collimator, a bed, a chair, and an auxiliary fixation portion. In this case, an appropriate fixation object can be selected in accordance with the posture of the irradiated body in the irradiation room.

[0017] The therapeutic apparatus of the present application includes: an irradiation room including an irradiation device that irradiates a neutron ray to an irradiated body; a preparation room that prepares irradiation in the irradiation room; a fixation object that is movable between the preparation room and the irradiation room and fixes a relative position with the irradiated body; and a surrounding simulation mechanism that simulates a surrounding portion of the fixation object after the fixation object is disposed in the irradiation room when the relative position of the fixation object and the irradiated body is fixed in the preparation room.

[0018] According to the therapeutic apparatus, the same effects as the therapeutic preparation device described above can be obtained.

[0019] Effects of the Invention

[0020] According to the present application, a therapeutic preparation device and a therapeutic apparatus that can position an irradiated body in a position that is less likely to deviate during irradiation when the irradiated body is positioned in a preparation room can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic configuration diagram of a neutron capture therapy system to which a therapeutic preparation device according to an embodiment of the present application is applied.

[0022] Figure 2 FIG. 2 is a schematic configuration diagram showing the irradiation room.

[0023] Figure 3 FIG. 3 is a schematic configuration diagram showing the therapeutic preparation device.

[0024] Figure 4 FIG. 4 is a schematic configuration diagram showing a therapeutic preparation device according to a modification.

[0025] Figure 5 FIG. 5 is a schematic configuration diagram showing a therapeutic preparation device according to another modification.

[0026] Explanation of Symbols

[0027] 3 - irradiation room, 10 - preparation room, 21 - collimator, 30 - bed, 40 - mock wall structure (structure), 42, 52 - sensor, 43, 53 - output, 44 - through portion, 100 - treatment preparation device, 101 - fixed object, 102 - peripheral mock mechanism, 104 - peripheral portion, 130 - chair, 131 - waist rest member (auxiliary fixation portion), 132 - chin rest member (auxiliary fixation portion), 133 - elbow rest member (auxiliary fixation portion), 200 - treatment apparatus, 201 - irradiation device, Q - patient (irradiated body). DETAILED DESCRIPTION

[0028] Hereinafter, a detailed description will be given of the embodiments with reference to the drawings. In addition, the same reference numerals are assigned to the same elements in the description of the drawings, and repeated description is omitted.

[0029] The treatment preparation device according to an embodiment of the present application is used for a neutron capture therapy system. Therefore, first, a general structure of the neutron capture therapy system is described, and then the treatment preparation device is described. In addition, the same reference numerals are assigned to the same elements in the description of the drawings, and repeated description is omitted. Also, as shown in each drawing, sometimes, an X direction, a Y direction, and a Z direction orthogonal to each other are set, and are used in the following description. In addition, at this time, the vertical direction is set as the Z direction, and the irradiation direction of the neutron ray N is set as the X direction.

[0030] First, with reference to Figure 1 and Figure 2 The overall structure of the neutron capture therapy system 1 is described. The neutron capture therapy system 1 is a system that performs boron neutron capture therapy (BNCT). The neutron capture therapy is a therapy that performs treatment of a lesion (for example, a tumor or the like) of a patient by irradiating a patient Q (irradiated body) into which boron (B) is introduced with a neutron ray. 10

[0031] ​The treatment apparatus 200 has the irradiation room 3 that accommodates the patient Q placed on the treatment table 2 and irradiates the patient Q with a neutron ray, the accelerator room 9 that accommodates the accelerator 5 that generates a charged particle beam P and the transport line 8 that transports the charged particle beam P emitted from the accelerator 5 to the neutron ray generating portion 11 described later, and the neutron capture therapy system 1. The neutron capture therapy system 1 has the neutron ray generating portion 11 that receives the charged particle beam from the transport line 8 and generates a neutron ray for irradiating the patient Q and the accelerator 5. The irradiation device 201 that irradiates the patient Q with a neutron ray is constituted by the neutron ray generating portion 11. The accelerator 5 is, for example, a cyclotron that accelerates a charged particle (for example, a proton) and emits a charged particle beam P (for example, a proton beam). The accelerator 5 has, for example, a capacity of emitting a charged particle beam P of 60 kw (= 30 MeV x 2 mA) with a beam radius of 40 mm. In addition, the accelerator 5 is not limited to a cyclotron, but can be a synchrotron, a linear accelerator, an electrostatic accelerator, or another accelerator. The irradiation room 3 and the accelerator room 9 are closed spaces surrounded by a shield wall W that is a wall made of concrete for shielding a radioactive ray. The neutron ray generating portion 11 is arranged so as to be buried in the shield wall W that separates the irradiation room 3 and the accelerator room 9. In addition, the neutron ray generating portion 11 can also be arranged in the irradiation room 3 without being buried in the shield wall W.

[0032] Further, the treatment apparatus 200 has the preparation room 10 that is adjacent to the irradiation room 3 in the Y direction. The preparation room 10 is separated from the irradiation room 3 by the shield wall W. The connecting room 13 through which passage between the irradiation room 3 and the preparation room 10 is possible is provided to the shield wall W. Further, a shield door 15 that is openable and closable is provided at the boundary of the connecting room 13 and the irradiation room 3 and the boundary of the connecting 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 connecting room 13. In the preparation room 10, a preparation work is performed before treatment. The preparation work can be, for example, a work of fixing (restricting) the patient Q in a prescribed posture with respect to the treatment table 2.

[0033] As Figure 2As shown, the neutron beam generating unit 11 includes a target T that receives irradiation from a charged particle beam P to generate neutron beams N, a decelerating material 17 that slows down (reduces the energy) the generated neutron beams N, and a shielding body 19 that covers at least a portion of the area around the decelerating material 17 to shield radiation. The shielding body 19 shields secondary radiation such as gamma rays generated from the decelerating material 17. A through-hole 19a is formed in the shielding body 19 for the neutron beams N to pass through. Additionally, the wall separating the irradiation chamber 3 and the accelerator chamber 9, as the shielding wall W, decelerating material 17, and shielding body 19, is sometimes referred to as a partition wall 20. The neutron beams N emitted from the decelerating material 17 are irradiated onto the patient Q by a collimator 21 installed on the treatment table 2. The collimator 21 can change the irradiation range of the neutron beams N irradiating the patient Q. The collimator 21 is installed on the wall surface 20a of the partition wall 20 on the irradiation chamber 3 side. An opening, or irradiation port 18, is formed in the partition wall 20 to emit neutron rays N that have passed through the through-hole 19a and irradiate the patient Q. A collimator 21 is installed in this irradiation port 18. Figure 2 In the example shown, the collimator 21 is embedded in the irradiation port 18.

[0034] exist Figure 2 During treatment, patient Q on treatment table 2 is placed in a supine position, but sometimes patient Q in a seated position is irradiated with neutron rays N (see below). Figure 5 Depending on the location of the lesion in patient Q, the patient is sometimes positioned in a sitting position so that the lesion is close to the collimator 21. The following embodiments describe the irradiation of patient Q in a sitting position with neutron rays N.

[0035] In neutron capture therapy based on neutron capture therapy system 1, a treatment plan is created that determines the distribution and intensity of neutron rays irradiated to patient Q. Appropriate neutron irradiation of the lesion in patient Q is necessary; therefore, the patient Q's posture is also an important factor in the treatment plan. Therefore, in Figure 1 Preparation room 10 shown (reference) Figure 1 In this process, the posture of patient Q during treatment in irradiation room 3 is adjusted in a planned manner.

[0036] Next, refer to Figure 1 and Figure 3 The treatment preparation apparatus 100 according to this embodiment will be described. The treatment preparation apparatus 100 is a device installed in a preparation chamber 10, which is used for irradiation preparation in an irradiation chamber 3 for irradiating a patient Q with neutron rays N. Figure 1 and Figure 3 As shown, the treatment preparation device 100 includes a fixed object 101 and a surrounding simulation mechanism 102.

[0037] The fixed object 101 is an object that becomes an object whose relative position to the patient Q is fixed in the irradiation room 3. In the present 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 that loads the patient Q in a lying state. As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13. Figure 3 As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13. Figure 1 As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13.

[0038] The support portion 32 extends upward from the base portion 31 to support the bed 30 at the upper end. The support rod 34 that supports the collimator 21 is connected to the lower end of the support portion 32. The bed 30, the collimator 21, the support portion 32, and the support rod 34 are rotatable in the XY plane in a state of being supported by the base portion 31. As shown in FIG. 1, when irradiation is performed in the irradiation room 3, the bed 30 is arranged at an arbitrary angle with respect to the collimator 21. Therefore, when positioning of the patient Q is performed in the preparation room 10, the bed 30 is also arranged at an arbitrary angle with respect to the collimator 21. The bed 30 is rotated by 90° so as to have a length direction in the Y axis direction when moving from the preparation room 10 to the irradiation room 3 in a manner that can pass through the connecting room 13. Figure 1 As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13.

[0039] As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13. Figure 3 As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13. Figure 2 As shown in FIG. 1, the bed 30 is supported to the base portion 31 via the support portion 32. The base portion 31 is movably arranged on the floor along the guide portion 33. The guide portion 33 extends from the preparation room 10 to the irradiation room 3 via the connecting room 13. Thus, the treatment table 2 having the bed 30 can move reciprocally between the preparation room 10 and the irradiation room 3 along the movement path Ml (refer to FIG. 1) passing through the connecting room 13. Figure 2) is constituted. The simulation wall structure 40 does not need to simulate the entire partition wall 20, but only needs to simulate at least a portion of the partition wall 20 that is likely to come into contact with the patient Q. Therefore, the simulation wall structure 40 has a wall surface 40a that simulates the wall surface 20a of the partition wall 20 in an area around the mounting position of the collimator 21. The height and thickness of the simulation wall structure 40 are smaller than those of the partition wall 20. Also, the simulation wall structure 40 is provided only in a portion of the periphery of the bed 30 in the Y-axis direction (see FIG. 1) with respect to the fixed object 101. Figure 1

[0040] The simulation wall structure 40 of the periphery simulation mechanism 102 is movable with respect to the fixed object 101. The simulation wall structure 40 is reciprocally movable in the X-axis direction, and is disposed in a position close to the collimator 21 when positioning the patient Q is performed, and is movable in a manner separated from the collimator 21 in the negative side of the X-axis direction when the positioning is completed. The simulation wall structure 40 has a moving mechanism 41 such as a wheel that is able to travel on the floor. The wheel of the moving mechanism 41 can be configured to switch between contact and non-contact with the bed surface by lever operation or the like.

[0041] The periphery simulation mechanism 102 can have a sensor 42 that detects contact with the simulation wall structure 40, and an output section 43 that outputs the detection result of the sensor 42. The sensor 42 is not particularly limited as long as it is a sensor that is able to detect contact of the patient Q with the simulation wall structure 40, and can be a non-contact sensor (a sensor that uses light such as laser light, ultrasonic waves, radar, electric waves, or the like), or can be a contact sensor (a sensor that uses pressure detection or the like). When the patient Q comes into contact with the simulation wall structure 40, the output section 43 can output a warning sound or output a warning content to a monitor. However, the output method and output content of the output section 43 are not particularly limited as long as the situation in which the patient Q comes into contact with the simulation wall structure 40 can be known.

[0042] The simulation wall structure 40 has a through portion 44 that corresponds to the irradiation path in the irradiation room 3. The through portion 44 penetrates the simulation wall structure 40 in the X-axis direction in a position corresponding to the penetration hole of the collimator 21. The through portion 44 simulates the penetration hole 19a of the shielding body 19 as an irradiation path through which the neutron ray N passes in the partition wall 20. Figure 2 ) in the through portion 44 simulates the irradiation port 18 Figure 2 ) in the through portion 44 simulates the irradiation port 18 Figure 3 ​In the present embodiment, the collimator 21 is attached to the simulated wall structure 40 in a manner that it is crimped to the opening portion 48, but the collimator 21 can also be attached to the simulated wall structure 40 in a manner that it is embedded in the opening portion 48. In addition, the through portion 44 is a portion that functions as a peephole when the positioning work of the patient Q is performed. Therefore, the through portion 44 can be plugged when other than the positioning work, and thus a lid portion or the like based on a left-right split structure can be provided.

[0043] Next, the effect of the treatment preparation device 100 according to the present embodiment will be described.

[0044] The treatment preparation device 100 has a fixed object 101 that is fixed in the irradiation room 3 with respect to the relative position of the patient Q. Therefore, the positioning of the patient Q with respect to the fixed object 101 in the preparation room 10 can be performed in a manner that the patient Q can be treated in an appropriate position at the time of irradiation.

[0045] Here, as a comparative example, a neutron capture therapy system in which the surrounding simulation mechanism 102 is not provided in the preparation room 10 will be described. At this time, the patient Q needs to maintain the same posture for a long time, and thus a comfortable posture is sometimes taken. For example, the patient Q sometimes moves the body part other than the affected part. For example, the patient Q can place the arm on the collimator 21. If the patient Q is transported to the irradiation room 3 in this state together with the fixed object 101, the arm of the patient Q can come into contact with the partition wall 20, and thus the irradiation position can be deviated. In this way, when the patient Q is deviated, the worker needs to enter the irradiation room 3 to perform the positioning work.

[0046] In contrast to this, in the treatment preparation device 100 according to the present embodiment, the treatment preparation device 100 has the surrounding simulation mechanism 102 that simulates the surrounding portion 104 of the fixed object 101 after the fixed object 101 is arranged in the irradiation room 3 when the fixed object 101 is fixed in the preparation room 10 with respect to the relative position of the irradiated body. Therefore, when the positioning of the patient Q is performed in the preparation room 10, the positioning can be performed by taking into account the surrounding portion 104 of the fixed object 101 in the irradiation room 3 by using the surrounding simulation mechanism 102. That is, in the preparation room 10, the patient Q can be fixed in a position in which the deviation is less likely to occur in the irradiation room 3 on the basis of the positional relationship between the patient Q and the surrounding portion 104. According to the above, when the positioning of the patient Q is performed in the preparation room 10, the positioning can be performed in a position in which the deviation is less likely to occur at the time of irradiation. Thus, the worker does not need to enter the irradiation room 3 to perform the positioning work, and thus the reduction of the radiation can be achieved.

[0047] The peripheral simulation mechanism 102 can be a simulation wall structure 40 that simulates the peripheral portion 104. At this time, the peripheral simulation mechanism 102 can simulate the peripheral portion 104, i.e., the partition wall 20, with high reproducibility using the simulation wall structure 40.

[0048] The simulation wall structure 40 of the peripheral simulation mechanism 102 can be movable with respect to the fixed object 101. At this time, after positioning of the patient Q in the vicinity of the peripheral portion 104 is first completed, the simulation wall structure 40 is retracted from the vicinity of the fixed object 101, and thus positioning of other portions of the patient Q can be performed in a state in which work is easy to perform.

[0049] The peripheral simulation mechanism 102 can have a sensor 42 that detects contact with the simulation wall structure 40 and an output portion 43 that outputs a detection result of the sensor 42. At this time, a worker who performs positioning can easily grasp a situation in which the patient Q contacts the simulation wall structure 40.

[0050] The simulation wall structure 40 can have a penetration portion 44 that corresponds to an irradiation path in the irradiation room 3. At this time, even if the simulation wall structure 40 is disposed in the vicinity of the fixed object 101, a worker who performs positioning can grasp a situation of the patient Q from the penetration portion 44.

[0051] The treatment apparatus 200 includes the irradiation room 3 that has the irradiation device 201 that irradiates a neutron ray to an irradiated body; the preparation room 10 that is used for preparation of irradiation in the irradiation room 3; the fixed object 101 that is movable between the preparation room 10 and the irradiation room 3 and has a relative position to the irradiated body fixed; and the peripheral simulation mechanism 102 that simulates a peripheral portion 104 of the fixed object 101 after the fixed object 101 is disposed in the irradiation room 3 when the relative position of the fixed object 101 to the irradiated body is fixed in the preparation room 10.

[0052] According to the treatment apparatus 200, the same advantageous effects as those of the treatment preparation device 100 described above can be obtained.

[0053] In neutron capture therapy, it is desirable to increase an effective dose, and thus it is desirable to place a patient as close to the collimator 21 as possible. The collimator 21 sometimes becomes a configuration that is buried in a wall surface when treatment is performed. At this time, there is a possibility that a body portion other than a treatment site (an arm or the like) contacts a wall and the irradiation position deviates. Therefore, a mechanism that simulates a peripheral shape of an object of a fixed patient is provided. Thus, it is possible to place a patient (also including a portion other than a diseased portion) at a position at which a position of the diseased portion at the time of treatment does not deviate.

[0054] In the treatment device 200, when a treatment procedure is adopted that proceeds through stages from the preparation room 10 to the irradiation room 3, the worker does not need to enter the treatment room because the fixation is completed during the treatment preparation stage, thus achieving low radiation levels. Without this device, there would be a necessity for the worker to enter the treatment room to perform the fixation work.

[0055] The present invention is not limited to the embodiments described above.

[0056] For example, such as Figure 4 As shown, the peripheral simulation mechanism 102 can simulate the peripheral part 104, i.e., the partition 20, using non-physical mechanisms. Specifically, the peripheral simulation mechanism 102 has an oscillator 51 that causes the non-physical mechanism to oscillate. The non-physical mechanism is a mechanism that can be used for various measurements and detections, such as colored light, ultrasound, radar, and radio waves. Figure 4 In this non-physical mechanism, colored light L1 is used. Oscillator 51 oscillates the colored light L1 by positioning it at a location corresponding to the wall surface 20a of the partition 20. Oscillator 51 can be installed in the preparation room 10 in any manner, such as on the ceiling or walls of the preparation room 10, on a special tool, or on a fixed object 101. Multiple oscillators 51 can also be arranged at predetermined intervals at positions corresponding to the wall surface 20a. Furthermore, the colored light L1 oscillates from top to bottom, but it can also oscillate from bottom to top, or oscillate laterally or obliquely. Alternatively, when oscillator 51 is installed in collimator 21, the colored light L1 can oscillate radially from the central axis of collimator 21. Peripheral simulation mechanism 102 can, for example, simulate the partition 20 within the range of movement of the patient Q's body parts while the patient Q's affected area is fixed to collimator 21.

[0057] As described above, the peripheral simulation mechanism 102 can simulate the peripheral part 104 using non-physical mechanisms. In this case, even if no large-scale structures are set up in the preparation room 10, the peripheral simulation mechanism 102 can easily simulate the peripheral part 104.

[0058] The peripheral simulation mechanism 102 may include a sensor 52 for detecting simulated contact between patient Q and peripheral area 104, and an output unit 53 for outputting the detection results of sensor 52. In this case, the operator performing the positioning can easily grasp the simulated contact between patient Q and peripheral area 104. Furthermore, sensor 52 is positioned opposite oscillator 51. Figure 4 In the example shown, it is installed on the floor. Alternatively, sensor 52 and output unit 53 can be omitted. For example, when colored light L1 is used as a non-physical mechanism, the operator can determine the simulated contact between patient Q and the surrounding part 104 by confirming that the colored light L1 is blocked by patient Q.

[0059] The colored light L1, which is a non-physical component, can be a different color than the light L2 used to confirm the irradiation position of the patient Q. In this case, it is possible to prevent the operator performing the positioning from confusing the light L2 used to confirm the irradiation position with the colored light L1 that simulates the peripheral part 104.

[0060] Here, the fixation object 101 can be selected from a collimator, a bed, a chair, and an auxiliary fixation unit. At this time, an appropriate fixation object 101 can be selected based on the posture of the patient Q in the irradiation room 3. In the above embodiment, treatment is performed with the patient Q in a supine position, therefore a collimator and a bed are selected as the fixation object 101. On the other hand, when treatment is performed with the patient Q in a sitting position, a chair is selected instead of a bed as the fixation object 101, and an auxiliary fixation unit can also be further selected.

[0061] Specifically, the following can be adopted: Figure 5 The treatment preparation device 100 shown is as described. Figure 5 As shown, the collimator 21 and chair 130 are selected as the fixed object 101, and a lumbar support member 131, a jaw support member 132, and an elbow support member 133 are used as auxiliary fixation parts. Furthermore, the collimator 21, lumbar support member 131, jaw support member 132, and elbow support member 133 are supported by support members (not shown) and can move together with the chair 130 into the irradiation chamber 3. The simulated wall structure 140 has a wall surface 140a with a shape matching the body parts of the patient Q in the seated position of the chair 130. For example, the wall surface 140a has a recess at a position corresponding to the patient Q's feet.

[0062] The radiation irradiated to the patient is not limited to neutron rays. Any system that irradiates radiation while the patient is in a fixed position is suitable for the treatment preparation device of the present invention.

Claims

1. A treatment preparation device provided in a preparation room for performing preparation for irradiation in an irradiation room for irradiating a subject with a neutron ray, the treatment preparation device comprising: a fixed object that is fixed in position relative to the subject; and a periphery simulation mechanism that, when the fixed object is fixed in position relative to the subject in the preparation room, simulates a periphery of the fixed object after the fixed object is disposed into the irradiation room.

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

3. The treatment preparation device according to claim 1 or 2, wherein the structure comprises a through portion corresponding to an irradiation path in the irradiation room.

4. The treatment preparation device according to claim 1 or 2, wherein the fixed object is selected from a collimator, a bed, a chair, and an auxiliary fixing portion.

5. A treatment preparation device provided in a preparation room for performing preparation for irradiation in an irradiation room for irradiating a subject with a neutron ray, the treatment preparation device comprising: a fixed object that is fixed in position relative to the subject; and a periphery simulation mechanism that, when the fixed object is fixed in position relative to the subject in the preparation room, simulates a periphery of the fixed object after the fixed object is disposed into the irradiation room.

6. The treatment preparation device according to claim 5, wherein the periphery simulation mechanism comprises a sensor that detects contact with the subject and an output portion that outputs a detection result of the sensor.

7. The treatment preparation device according to claim 5, wherein the non-physical mechanism is a light having a color different from a color of a light used for confirming a position of the subject.

8. A treatment apparatus comprising: an irradiation room comprising an irradiation device that irradiates a subject with a neutron ray; a preparation room for performing preparation for irradiation in the irradiation room; a fixed object that is movable between the preparation room and the irradiation room and is fixed in position relative to the subject; and a periphery simulation mechanism that, when the fixed object is fixed in position relative to the subject in the preparation room, simulates a periphery of the fixed object after the fixed object is disposed into the irradiation room.

9. A treatment apparatus comprising: an irradiation room comprising an irradiation device that irradiates a subject with a neutron ray; a preparation room for performing preparation for irradiation in the irradiation room; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A fixed object is capable of moving between the preparation room and the irradiation room so that the relative position thereof is fixed to the irradiated body; and A peripheral simulation mechanism simulates the peripheral portion of the fixed object after the fixed object is disposed in the irradiation room when the relative position of the fixed object and the irradiated body is fixed in the preparation room. The peripheral simulation mechanism simulates the peripheral portion by a non-physical mechanism.

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