CN118253045A - Neutron capture therapy device and therapeutic bed - Google Patents

Abstract

The invention provides a neutron capture therapy device and a treatment couch capable of reducing the burden of a patient when the patient takes a lateral position and posture for a long time during treatment. A treatment couch (100) of a neutron capture therapy device (1) is provided with: a placement unit (60) for placing the patient (50) and having an arm passing unit (62) for passing the arm (51) of the placed patient (50); and a support part (61) for supporting the arm (51) passing through the arm passing part (62). Therefore, when the patient (50) is placed on the placement unit (60) in a lateral position, the patient (50) can pass the lower arm (51) through the arm passing unit (62), and the arm (51) is supported by the support unit (61). Therefore, the patient (50) can maintain the lateral position and posture in a comfortable state in which the arm (51) is supported. The support portion (61) has a maintaining structure (70) for maintaining the relative positional relationship with the placement portion (60). Therefore, when the placement part (60) is moved, the patient (50) can be moved by the maintenance structure (70) while the arm (51) is supported by the support part (61).

Description

Neutron capture therapy device and therapeutic bed

Technical Field

The present application claims priority based on japanese patent application No. 2022-212302 filed on 28 of 12 months of 2022. The entire contents of this japanese application are incorporated by reference into the present specification.

The invention relates to a neutron capture therapy device and a therapeutic bed.

Background

As a neutron capture therapy for killing cancer cells by irradiating neutron rays, there is known a boron neutron capture therapy (BNCT: boron Neutron Capture Therapy) using a boron compound. In the boron neutron capture therapy, a neutron beam is irradiated to boron previously doped into cancer cells, and the cancer cells are selectively destroyed by scattering of the heavy charged particles generated thereby.

As the neutron capture therapy device described above, for example, a device shown in patent document 1 is known. The neutron capture therapy device shown in patent document 1 performs therapy by being placed in front of an irradiation port of neutron rays in a state where a patient is fixed to a treatment bed.

Patent document 1: japanese patent laid-open publication 2016-83251

Here, when a patient is treated by the neutron capture therapy device, the patient in a lateral position may be fixed to a bed. Here, in the treatment, it is necessary to insert a drip into the arm. Therefore, the patient needs to maintain a state of stretching the lower arm in the lateral position so as not to crush the drops by the patient's body. However, maintaining the lateral position with the arms extended has a problem that it is a burden on the patient.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a neutron capture therapy device and a therapeutic bed that can reduce the burden on a patient when the patient takes a lateral position and posture for a long period of time during treatment, and can reliably perform treatment.

The neutron capture therapy device according to the present invention includes: a treatment bed for placing a patient irradiated with neutron rays; and an irradiation unit that irradiates a patient placed on the treatment couch with neutron rays, wherein the patient is disposed with respect to the irradiation unit in a state in which the positional relationship between the patient and the treatment couch is fixed, and the treatment couch is provided with: a placement unit for placing a patient; and a support portion for supporting the arm, the support portion having a maintaining structure for maintaining a relative positional relationship with the placement portion.

In the neutron capture therapy device according to the present invention, the patient is disposed with respect to the irradiation unit in a state where the positional relationship between the patient and the treatment table is fixed, and the neutron is irradiated from the irradiation unit. Thus, the irradiation unit can suppress movement of the treatment site of the patient during treatment, and irradiate the neutron beam to the treatment site. In contrast, the treatment couch includes: a placement unit for placing a patient; and a support unit for supporting the arm. Therefore, when the patient is placed on the placement unit in the side position, the patient can support the lower arm with the support unit. Therefore, the patient can maintain the recumbent posture in a comfortable state in which the arms are supported. The support portion has a holding structure for holding the relative positional relationship with the placement portion. Therefore, when the placement unit is moved, the patient can be moved while the arm is supported by the support unit by the maintenance structure. According to the above, the burden on the patient in the case of taking the side lying posture for a long time during the treatment can be reduced. As a result of reducing the burden on the patient, the neutron beam is accurately irradiated by suppressing the movement of the treatment site during the treatment, thereby enabling reliable treatment.

The treatment couch is movable relative to the irradiation section of the neutron beam. In this case, the patient can be moved to the position of the irradiation unit while the patient is fixed to the treatment couch.

The holding structure may be constituted by a connection portion of the support portion with respect to the mounting portion. In this case, the support portion is connected to the placement portion, and therefore the support portion can move together with the arm of the patient in synchronization with the placement portion.

The holding structure may be a moving mechanism capable of independently moving the support portion with respect to the mounting portion. In this case, when the placement unit moves, the support unit can be moved together with the arm of the patient so as to follow the placement unit.

The treatment couch can fix the patient in a state where the drops are inserted. In this case, by supporting the arm with the support portion, it is possible to keep the patient in a comfortable posture while suppressing the drip from being crushed by the body of the patient.

The placement unit may have an arm passing unit through which an arm of the placed patient passes. In this case, the patient in the lateral position can easily reach a state in which the patient supports the trunk by the loading unit and supports the lower arm by the support unit when the neutron beam is irradiated. In addition, when the neutron beam is irradiated, the patient in the lateral position can maintain a more comfortable posture.

The treatment couch according to the present invention is a treatment couch for placing a patient irradiated with neutron rays, comprising: a placement unit for placing a patient; and a support portion for supporting the arm, the support portion having a maintaining structure for maintaining a relative positional relationship with the placement portion.

The treatment bed according to the present invention comprises: a placement unit for placing a patient; and a support unit for supporting the arm, so that when the patient is placed on the placement unit in a lateral position, the patient can support the lower arm with the support unit. Therefore, the patient can maintain the recumbent posture in a comfortable state in which the arms are supported. The support portion has a holding structure for holding the relative positional relationship with the placement portion. Therefore, when the placement unit is moved, the patient can be moved while the arm is supported by the support unit by the maintenance structure. According to the above, the burden on the patient in the case of taking the side lying posture for a long time during the treatment period can be reduced, and the treatment can be performed reliably.

Effects of the invention

According to the present invention, it is possible to provide a neutron capture therapy device and a therapeutic bed that can reduce the burden on a patient when the patient takes a lateral position and posture for a long period of time during treatment, and can reliably perform treatment.

Drawings

Fig. 1 is a schematic diagram showing a neutron capture therapy device according to an embodiment of the present invention.

Fig. 2 (a) is a schematic plan view of the treatment table, and fig. 2 (b) is a schematic cross-sectional view taken along the line IIb-IIb shown in fig. 2 (a).

Fig. 3 is a schematic plan view of the treatment table in a state where a patient is placed thereon.

Fig. 4 is a schematic cross-sectional view of the treatment couch in a state where a patient is placed.

Fig. 5 is a schematic cross-sectional view showing a treatment bed according to a modification.

Fig. 6 is a schematic diagram showing a neutron capture therapy system including a neutron capture therapy device according to a modification.

In the figure: 1-neutron capture therapy device, 50-patient, 51-arm, 60-placement portion, 61-support portion, 100-treatment couch, 106-irradiation port (irradiation portion).

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic diagram showing a neutron capture therapy device 1 according to an embodiment of the present invention. The neutron capture therapy device 1 is a device for treating cancer using boron neutron capture therapy (BNCT: boron Neutron Capture Therapy). The neutron capture therapy device 1 includes a therapeutic unit 102, a therapeutic bed 100, and a moving mechanism 110.

The treatment unit 102 has an irradiation port 106 (irradiation unit) for irradiating the patient 50 with neutron rays N. The treatment unit 102 is constituted by a structure or the like in which the irradiation port 106 or the movement mechanism 110 is disposed. The treatment unit 102 is provided in the treatment room 101. The irradiation port 106 is provided in a vertical wall portion of the treatment room 101. Neutron ray N is emitted from irradiation port 106 in the horizontal direction. The irradiation port 106 includes a collimator 20 and an irradiation portion peripheral wall 115, which will be described later. The moving mechanism 110 is a mechanism that can move the treatment couch 100 on which the patient 50 is placed in the treatment unit 102. The moving mechanism 110 is provided in the treatment room 101 at a position in front of the irradiation port 106.

In the treatment unit 102, for example, a neutron ray N is irradiated to a tumor of the patient 50 to which boron (¹⁰ B) is administered.

The neutron capture therapy device 1 includes an accelerator 2. The accelerator 2 accelerates particles and emits a particle beam R. For example, a cyclotron, a linear accelerator, or the like may be employed as the accelerator 2.

The particle beam R emitted from the accelerator 2 is kept in vacuum inside and the beam can be transferred to the target arrangement portion 30 through the inside of the transfer path 9 called a beam guide. The target arrangement portion 30 is a portion in which the target 10 is arranged, and has a mechanism for holding the target 10 in a posture at the time of irradiation. The target arrangement portion 30 arranges the target 10 at a position facing the end (the ejection port) of the transport path 9. The particle beam R emitted from the accelerator 2 passes through the transport path 9 and travels toward the target 10 disposed at the end of the transport path 9. A plurality of electromagnets 4 (quadrupole electromagnets or the like) and scanning electromagnets 6 are provided along the transmission path 9. The plurality of electromagnets 4 perform beam axis adjustment of the particle beam R, for example, using an electromagnet.

The scanning electromagnet 6 scans the particle beam R, and controls irradiation of the target 10 with the particle beam R. The scanning electromagnet 6 controls the irradiation position of the particle beam R on the target 10.

The neutron capture therapy device 1 irradiates the target 10 with the particle beam R to generate a neutron beam N, and emits the neutron beam N toward the patient 50. The neutron capture therapy device 1 includes a target 10, a shield 8, a deceleration member 39, and a collimator 20.

The target 10 receives the irradiation of the particle beam R to generate a neutron beam N. The target 10 is a solid member made of a material that generates neutron rays N by irradiation with the particle rays R. Specifically, the target 10 is formed of, for example, beryllium (Be), lithium (Li), tantalum (Ta), and tungsten (W), and has, for example, a disc-like solid shape having a diameter of 160 mm. The target 10 is not limited to a disk shape, and may have other shapes.

The deceleration member 39 decelerates the neutron beam N generated by the target 10 (reduces the energy of the neutron beam N). The moderating member 39 may have a laminated structure formed of a layer 39A that moderates mainly fast neutrons contained in the neutron beam N and a layer 39B that moderates mainly epithermal neutrons contained in the neutron beam N.

The shield 8 shields the generated neutron beam N and gamma rays and the like generated in association with the generation of the neutron beam N from being released to the outside. The shield 8 is provided so as to surround the decelerating members 39. The upper and lower portions of the shield 8 extend from the deceleration member 39 to the upstream side of the particle beam R.

The collimator 20 shapes the irradiation field of the neutron ray N, and has an irradiation port 20a through which the neutron ray N passes. The collimator 20 is, for example, a square block-shaped member having an illumination port 20a at the center. The collimator 20 is attached to an irradiation unit peripheral wall 115 which is a wall portion of a portion where the neutron beam N is irradiated into the treatment room 101.

The moving mechanism 110 is a so-called six-axis mechanism that moves the treatment couch 100 on which the patient 50 is placed in the six-axis direction. The moving mechanism 110 can horizontally move and rotationally move the treatment couch 100. In the present embodiment, the movement mechanism 110 supports the patient 50 in a state of being placed on the treatment couch 100, and moves the patient 50 together with the treatment couch 100.

Next, a detailed structure of the treatment couch 100 will be described with reference to fig. 2 to 4. Fig. 2 (a) is a schematic plan view of the treatment couch 100. Fig. 2 (b) is a schematic cross-sectional view taken along the line IIb-IIb shown in fig. 2 (a). Fig. 3 is a schematic plan view of the treatment couch 100 in a state where the patient 50 is mounted. Fig. 3 is a schematic cross-sectional view of the treatment couch 100 in a state where the patient 50 is mounted.

As shown in fig. 2, the treatment couch 100 includes a placement portion 60 and a support portion 61. The placement unit 60 is a member for placing the patient 50. The mounting portion 60 is a rectangular plate-like member. The placement portion 60 has long-side edge portions 60a and 60b and short-side edge portions 60c and 60d. The placement unit 60 has an upper surface 60e (see fig. 3) serving as a placement surface for placing the patient 50 thereon

As shown in fig. 2 (a), the placement unit 60 includes an arm passing unit 62 (see also fig. 4) through which the arm 51 of the placed patient 50 passes. The arm passing portion 62 is formed of a notch or a through hole penetrating the mounting portion 60 in the up-down direction. In the present embodiment, the arm passing portion 62 is formed of a notch portion extending from the long side edge portion 60a toward the long side edge portion 60 b. The arm passing portion 62 is formed at a position close to the edge portion 60c on the short side. As shown in fig. 3 and 4, the patient 50 placed on the upper surface 60e of the placement unit 60 in the side position can extend the arm 51 on the placement unit 60 side downward through the arm passing portion 62.

As shown in fig. 2b, the support portion 61 supports the arm 51 passing through the arm passing portion 62 (refer to fig. 4). The support portion 61 has a bottom wall portion 63 parallel to the mounting portion 60 at a position spaced downward from the arm passing portion 62. The support portion 61 has a side wall portion 64 extending upward from an edge portion of the bottom wall portion 63. As shown in fig. 4, the patient 50 extends the upper arm 51a downward from the arm passing portion 62, bends the elbow, and places the forearm 51b on the bottom wall portion 63. The forearm 51b placed on the bottom wall 63 is protected by being surrounded by the side wall 64.

The support portion 61 has a maintaining structure 70 for maintaining a relative positional relationship with the placement portion 60. Here, maintaining the relative positional relationship means not only a state in which the relative position of the support portion 61 with respect to the mounting portion 60 is completely constant, but also allowing some variation in the relative position of the support portion 61 with respect to the mounting portion 60 within a range in which the positional relationship such as to maintain the function of the support portion 61 as the support arm 51 can be maintained. The holding structure 70 not only means that the operation of the supporting portion 61 is completely synchronized with the operation of the mounting portion 60, but also allows some deviation in the operation of both.

In the present embodiment, the holding structure 70 is constituted by a connection portion 71 between the support portion 61 and the mounting portion 60. The connection portion 71 connects the upper end portion of the side wall portion 64 and the lower surface 60f of the mounting portion 60. Thereby, the support portion 61 is fixed to the mounting portion 60. Therefore, when the mounting portion 60 moves, the supporting portion 61 also moves in synchronization with this operation. The relative position of the support portion 61 with respect to the mounting portion 60 is completely constant.

Next, with reference to fig. 3 and 4, the procedure when the patient 50 is treated with the treatment couch 100 will be described. As shown in fig. 3 and 4, first, the patient 50 is placed on the upper surface 60e of the placement unit 60 of the treatment couch 100 in the side-lying position. At this time, the patient 50 extends the lower arm 51 downward of the placement unit 60 through the arm passing unit 62. The elbow is bent, and the forearm 51b is placed on the bottom wall 63 of the support portion 61. Thus, the drip 73 is inserted into the forearm 51b supported by the support portion 61. The tube 74 of the drip 73 is pulled out from the arm passing portion 62. The treatment couch 100 fixes the patient 50 in a state where the drip 73 is inserted. In this fixing, a fixing tool or the like, not shown, may be used.

The moving mechanism 110 (see fig. 1) moves the treatment couch 100 to which the patient 50 is fixed, and positions a treatment site (here, a head) of the patient 50 in front of the collimator 20 of the irradiation port 106. Then, neutron rays are irradiated from the irradiation port 106 to the treatment site of the patient 50.

Next, the operation and effects of the treatment couch 100 and the neutron capture therapy device 1 according to the present embodiment will be described.

In the neutron capture therapy device 1 according to the present embodiment, the patient 50 is disposed with respect to the irradiation port 106 in a state where the positional relationship between the patient 50 and the treatment couch 100 is fixed, and the neutron B is irradiated from the irradiation port 106. Thus, the irradiation port 106 can irradiate the neutron ray B to the treatment site (tumor) of the patient 50 while suppressing movement of the treatment site during treatment. In contrast, the treatment couch 100 includes: a placement unit 60 for placing the patient 50 and having an arm passing unit 62 for passing the arm 51 of the placed patient 50; and a support portion 61 for supporting the arm 51 passing through the arm passing portion 62. Therefore, when the patient 50 is placed on the placement unit 60 in the side lying position, the patient 50 can pass the lower arm 51 through the arm passing unit 62, and support the arm 51 with the support unit 61. Therefore, the patient 50 can maintain the recumbent posture in a comfortable state in which the arms 51 are supported. Here, the support portion 61 has a maintaining structure 70 for maintaining the relative positional relationship with the placement portion 60. Therefore, when the placement unit 60 is moved, the patient 50 can be moved while the arm 51 is supported by the support unit 61 by the holding structure 70. In accordance with the above, the burden on the patient 50 in the case of taking the side position and posture for a long time during the treatment period can be reduced. As a result of reducing the burden on the patient 50, the neutron B is accurately irradiated while the movement of the treatment site during the treatment is suppressed, and thus the treatment can be reliably performed.

The treatment couch 100 is movable with respect to the neutron irradiation port 106. At this time, the patient 50 can be moved to the position of the irradiation port 106 in a state where the patient 50 is fixed to the treatment couch 100.

The holding structure 70 may be constituted by a connection portion 71 between the support portion 61 and the mounting portion 60. At this time, the support portion 61 is connected to the placement portion 60, and therefore the support portion 61 can move together with the arm 51 of the patient 50 in synchronization with the placement portion 60.

The support portion 61 is independently movable with respect to the mounting portion 60. At this time, when the placement unit 60 moves, the support unit 61 can be moved together with the arm 51 of the patient 50 so as to follow the placement unit 60.

The treatment couch 100 may fix the patient 50 in a state where the drops are inserted. At this time, by supporting the arm 51 with the support portion 61, the drop 73 can be prevented from being crushed by the body of the patient 50, and the patient 50 can be maintained in a comfortable posture.

The treatment couch 100 according to the present embodiment includes: a placement unit 60 for placing the patient 50 and having an arm passing unit 62 for passing the arm 51 of the placed patient 50; and a support portion 61 for supporting the arm 51 passing through the arm passing portion 62. Therefore, when the patient 50 is placed on the placement unit 60 in the side lying position, the patient 50 can pass the lower arm 51 through the arm passing unit 62, and support the arm 51 with the support unit 61. Therefore, the patient 50 can maintain the recumbent posture in a comfortable state in which the arms 51 are supported. Here, the support portion 61 has a maintaining structure 70 for maintaining the relative positional relationship with the placement portion 60. Therefore, when the placement unit 60 is moved, the patient 50 can be moved while the arm 51 is supported by the support unit 61 by the holding structure 70. In accordance with the above, the burden on the patient 50 in the case of taking the side position and posture for a long time during the treatment period can be reduced.

The present invention is not limited to the above embodiment.

For example, in the above embodiment, the support portion 61 is connected to the placement portion 60. Alternatively, the holding structure 70 may be a moving mechanism that can move the support portion 61 independently of the mounting portion 60. At this time, when the placement unit 60 moves, the support unit 61 can be moved together with the arm 51 of the patient 50 so as to follow the placement unit 60. Specifically, as shown in fig. 5, the upper end portion of the side wall portion 64 may not be connected to the mounting portion 60, and the support portion 61 may be provided to the movement mechanism 75. The moving mechanism 75 is constituted by a carriage or the like, for example. At this time, when the placement unit 60 is moved, the operator manually or automatically moves the actuator 75, so that the support unit 61 can follow the placement unit 60 together with the arm 51.

In the neutron capture therapy device according to the above embodiment, the arm passing portion is provided in the placement portion of the bed, but the present invention is not limited to this. The neutron capture therapy device of the present invention may be provided with a support portion having a maintaining structure for maintaining a relative positional relationship with the placement portion of the bed. For example, in a room different from the treatment room, a fixing operation for maintaining the posture of the patient under neutron irradiation to the bed is performed, and the bed is moved to the treatment room 101 together with the patient fixed, and the patient is placed at a predetermined position with respect to the irradiation port 106 at the time of receiving neutron irradiation. Then, the patient is irradiated with neutron rays, for example, several tens of minutes to several hours. In this way, by supporting the patient with the mounting portion and the support portion having the maintenance structure for maintaining the relative positional relationship with the mounting portion for a long period of time from the preparation stage before the treatment until the neutron irradiation, the burden on the patient is reduced, and as a result, the neutron irradiation is accurately performed while suppressing the movement of the treatment site during the treatment, thereby enabling the reliable treatment.

Fig. 6 is a schematic diagram showing a neutron capture therapy system including a neutron capture therapy device according to another embodiment. The neutron capture therapy system 201 (neutron capture therapy device) includes: a treatment room 203 which accommodates a patient placed on the treatment couch 202 and irradiates the patient with neutron rays; an accelerator chamber 209 accommodating an accelerator 205 that generates charged particle beams and a transmission line 207 that transmits the charged particle beams emitted from the accelerator 205 to an irradiation port 206, which will be described later; and an irradiation port 206 for receiving the charged particle beam from the transmission line 207 and generating a neutron beam for irradiation of the patient. The accelerator 205 is, for example, a cyclotron, accelerates charged particles (e.g., protons) and emits a charged particle beam P (e.g., proton beam). The accelerator 205 has, for example, a capability of emitting a charged particle beam with a beam radius of 40mm and 60kw (=30 MeVX mA). The accelerator 205 is not limited to a cyclotron, and may be another accelerator such as a synchrotron, a linear accelerator, or an electrostatic accelerator. The treatment chamber 203 and the accelerator chamber 209 are closed spaces surrounded by a shielding wall W, which is a wall made of concrete for shielding radiation. The irradiation port 206 includes a structure (not shown in fig. 6) corresponding to the collimator 20 and the irradiation portion peripheral wall 115 described with reference to fig. 1. The radiation port 206 is disposed so as to be buried in a shielding wall W that separates the treatment chamber 203 and the accelerator chamber 209. The irradiation port 206 may be disposed in the treatment chamber 203 without being embedded in the shielding wall W. Furthermore, the treatment asphyxia 203 and the accelerator asphyxia 209 may be provided as one room without being separated by the shielding wall W.

The neutron capture therapy system 201 further includes a preparation chamber 210 adjacent to the treatment chamber 203. The preparation chamber 210 is isolated from the treatment asphyxia 203 by a shielding wall W. A connection chamber 213 that can pass between the treatment asphyxia 203 and the preparation chamber 210 is provided to penetrate the shielding wall W. A shielding door 215 that can be opened and closed is provided at the boundary between the connection chamber 213 and the treatment asphyxia 203 and the boundary between the connection chamber 213 and the preparation chamber 210. The treatment couch 202 is movable between the treatment chamber 203 and the preparation chamber 210 via the connection chamber 213. In the preparation room 210, preparation work is performed before treatment. Specifically, the preparation room 210 is a room for performing a task required for irradiating a patient with neutron rays in the treatment room 203. In the preparation room 210, for example, a simulation of the alignment of the collimator 20 with the patient is performed, with the patient constrained to the treatment couch 202. Thus, the preparation chamber 210 has a size of the order: the treatment couch 202 can be configured, and a worker can easily perform a preparation work around the treatment couch 202. The above-described simulation of alignment can be performed by restraining (fixing) the patient on the treatment couch 202 in the preparation chamber 210 so as to be the same posture as when the neutron is irradiated from the irradiation port 206 to the patient in the treatment chamber 203.

In addition, in a state where the patient in the preparation room 210 in a state of being restrained (fixed) on the treatment couch 202 remains restrained on the treatment couch 202, the treatment couch 202 moves to the treatment room 203 through the connection room 213. The treatment couch 202 moved to the treatment room 203 is disposed on the irradiation port 206 side, and then neutral rays are irradiated from the irradiation port 206 to the patient. The patient fixed in the preparation room is transported to the irradiation unit of the irradiation room while being kept in a fixed state, and is irradiated with neutron rays. In this way, by supporting the patient with the mounting portion and the support portion having the maintenance structure for maintaining the relative positional relationship with the mounting portion for a long period of time from the preparation stage before the treatment until the neutron irradiation, the burden on the patient is reduced, and as a result, the neutron irradiation is accurately performed while suppressing the movement of the treatment site during the treatment, thereby enabling the reliable treatment.

In the embodiment of fig. 6, the patient is fixed to the treatment bed 202 in a room (preparation room 210) different from the treatment room 3, but may be fixed to another place in the treatment room 3 on the side away from the irradiation port 206. The patient may be transported by moving the bed between an image acquisition device (not shown) (such as a CT device) for capturing an image of the patient in order to confirm the fixed position of the patient in a state where the patient is fixed, and the irradiation port. The image acquisition device may be provided in the treatment room 203, or may be provided in a room different from the treatment room 203, such as the preparation room 210. In the embodiment of fig. 6, the collimator is provided at the irradiation port 206, but may be fixed to the treatment couch 202 instead of being provided at the irradiation port 206, and may be movable between the preparation chamber 210 and the treatment chamber 203 together with the treatment couch 202.

Mode 1

A neutron capture therapy device, comprising:

a treatment bed for placing a patient irradiated with neutron rays; and

An irradiation unit for irradiating the patient placed on the treatment table with neutron rays,

The patient is arranged relative to the irradiation unit in a state where the positional relationship between the patient and the treatment table is fixed, the neutron beam is irradiated from the irradiation unit,

The treatment bed is provided with:

A placement unit for placing the patient; and

A support part for supporting the arm,

The support portion has a maintaining structure for maintaining a relative positional relationship with the placement portion.

Mode 2

The neutron capture therapy device of claim 1, wherein,

The treatment couch is movable relative to the irradiation section of the neutron beam.

Mode 3

The neutron capture therapy device according to either of modes 1 or 2, wherein,

The holding structure is constituted by a connection portion of the support portion to the mounting portion.

Mode 4

The neutron capture therapy device of any one of claims 1 to 3, wherein,

The holding structure is a movement mechanism capable of independently moving the support portion with respect to the placement portion.

Mode 5

The neutron capture therapy device of any one of claims 1 to 4, wherein,

The treatment couch fixes the patient in a state where the drip is inserted.

Mode 6

The neutron capture therapy device of any one of claims 1 to 5, wherein,

The placement unit has an arm passing unit through which the arm of the patient placed on the placement unit passes.

Mode 7

A therapeutic bed for placing a patient irradiated with neutron rays, the therapeutic bed comprising:

A placement unit for placing the patient; and

A support part for supporting the arm,

The support portion has a maintaining structure for maintaining a relative positional relationship with the placement portion.

Claims (7)

1. A neutron capture therapy device, comprising:

a treatment bed for placing a patient irradiated with neutron rays; and

An irradiation unit for irradiating the patient placed on the treatment table with neutron rays,

The patient is arranged relative to the irradiation unit in a state where the positional relationship between the patient and the treatment table is fixed, the neutron beam is irradiated from the irradiation unit,

The treatment bed is provided with:

A placement unit for placing the patient; and

A support part for supporting the arm,

The support portion has a maintaining structure for maintaining a relative positional relationship with the placement portion.

2. The neutron capture therapy device of claim 1, wherein,

The treatment couch is movable relative to the irradiation section of the neutron beam.

3. The neutron capture therapy device of claim 1, wherein,

The holding structure is constituted by a connection portion of the support portion to the mounting portion.

4. The neutron capture therapy device of claim 1, wherein,

The holding structure is a movement mechanism capable of independently moving the support portion with respect to the placement portion.

5. The neutron capture therapy device of claim 1, wherein,

The treatment couch fixes the patient in a state where the drip is inserted.

6. The neutron capture therapy device of claim 1, wherein,

The placement unit has an arm passing unit through which the arm of the patient placed on the placement unit passes.

7. A therapeutic bed for placing a patient irradiated with neutron rays, the therapeutic bed comprising:

A placement unit for placing the patient; and

A support part for supporting the arm,

The support portion has a maintaining structure for maintaining a relative positional relationship with the placement portion.