JP5653897B2 - Patient treatment table for neutron irradiation and neutron irradiation apparatus - Google Patents

Description

  The present invention relates to a patient treatment table for neutron irradiation and a neutron irradiation apparatus.

  Neutron beam capture therapy is known as one of the methods for treating cancer and the like. In neutron capture therapy, for example, a drug containing boron is administered to a patient, and irradiated with neutron rays around the affected area where boric acid is deposited. The surrounding cancer cells are destroyed.

  Among neutron beam capture therapies, a method for treating a patient with a boric acid-containing drug is called BNCT [Boron Neutron Capture Therapy], and a device that performs BNCT is called a BNCT device. As a BNCT apparatus, for example, the one described in Patent Document 1 is known. In the BNCT apparatus described in Patent Document 1, a patient is seated on a chair and neutron irradiation is performed from the front side of the face to treat the affected part of the patient's head.

JP 2009-189725 A

  By the way, the reach of neutron rays is limited, and depending on the position of the affected part, it may not reach from the front of the face. In addition, there is a concern that irradiation from the front of the face may affect the tissues such as the eyes. For this reason, it has been studied to irradiate the patient's head with neutrons while the patient is laid down.

  However, when a simple bed-shaped patient treatment table is used, the patient treatment table interferes with the neutron beam irradiation unit, which causes a problem that the affected part cannot be sufficiently close to the irradiation unit.

  Therefore, an object of the present invention is to provide a patient treatment table for neutron irradiation and a neutron irradiation apparatus that can sufficiently bring the affected part of the patient's head closer to the irradiation part of the neutron beam.

  The present invention relates to a patient treatment table for neutron irradiation on which a patient is placed in neutron irradiation treatment, a treatment table main body for supporting the patient's body, and a head support portion for supporting the patient's head. And a moving mechanism for supporting the head support portion movably with respect to the treatment table main body in a horizontal plane.

  According to the neutron irradiation patient treatment table, the head support unit is configured to be movable in a horizontal plane with respect to the treatment table body, so that the position of the patient's head is changed without moving the treatment table body. be able to. Therefore, according to the patient treatment table for neutron irradiation, the treatment table main body does not interfere with the irradiation unit, compared with the case where the head support portion and the treatment table main body are integrated. Since only the position can be changed, the affected part of the patient's head can be made sufficiently close to the irradiated part of the neutron beam.

The moving mechanism may support the head support portion so as to be rotatable or swingable about a vertical axis.
According to this configuration, it is possible to finely adjust the orientation of the patient's head with respect to the neutron beam irradiation part, so that the irradiation part can be made closer to the affected part of the patient's head.

  The moving mechanism includes a first shaft member fixed to the treatment table main body, and a first shaft member that slidably supports the head support portion with respect to the first shaft member in the extending direction of the first shaft member. One slide support portion and a first connection portion that connects the head support portion to the first shaft member so as to be rotatable or swingable around the vertical axis may be provided.

  According to the patient treatment table for neutron irradiation, the head support portion is slidably supported with respect to the first shaft member, so that the patient head can be moved freely in the extending direction of the first shaft member. Can be made. Further, in the above patient treatment table for neutron irradiation, since the head support portion is connected to the first shaft member so as to be rotatable or swingable, fine adjustment of the orientation of the patient head with respect to the irradiation portion is possible. It becomes possible, and the irradiated part of the neutron beam can be made closer to the affected part of the patient's head.

  The moving mechanism includes a first shaft member fixed to the treatment table body, a second shaft member supported by the first shaft member, and a second shaft member with respect to the first shaft member. A first slide support portion that slidably supports the first shaft member in the extending direction of the first shaft member, and the second shaft member is slidable in the extending direction of the second shaft member with respect to the first shaft member A second slide support portion that supports the first shaft member, a first connection portion that supports the first shaft member so that the second shaft member can rotate or swing around the vertical axis, and a second shaft member In contrast, a second connecting portion that connects the head support portion so as to be rotatable or swingable around the vertical axis may be provided.

  According to the neutron irradiation patient treatment table, the head support portion is slidably supported with respect to both the first shaft member and the second shaft member, so that the patient's head can be freely moved in a horizontal plane. Can be moved to. Moreover, in the patient treatment table for neutron irradiation, since the second shaft member is connected to the first shaft member so as to be rotatable or swingable, the range in which the patient's head can move is greatly expanded. Can do. Further, according to the patient treatment table for neutron irradiation, the head support portion is connected to the second shaft member so as to be rotatable or swingable. Adjustment is possible, and the irradiated part of the neutron beam can be made closer to the affected part of the patient's head.

The said head support part may have an X-ray image acquisition means which receives X-ray irradiation and acquires the X-ray image of a head.
According to this configuration, since the X-ray image can be acquired in a state where the patient's head is fixed to the head support unit, the positioning of the patient head with respect to the irradiation unit is accurately performed based on the X-ray image. It can be carried out.

  The present invention comprises an irradiation unit for irradiating a neutron beam and a patient treatment table for neutron beam irradiation that places a patient in the irradiation direction of the neutron beam from the irradiation unit. A treatment table body for supporting, a head support portion for supporting the patient's head, and a moving mechanism for supporting the head support portion movably with respect to the treatment table body in a horizontal plane. It is characterized by.

  According to the neutron beam irradiation apparatus, since the head support portion is configured to be movable in a horizontal plane with respect to the treatment table body, the position of the patient's head can be changed without moving the treatment table body. . Therefore, according to the patient treatment table for neutron irradiation, the treatment table main body does not interfere with the irradiation unit, compared with the case where the head support portion and the treatment table main body are integrated. Since only the position can be changed, the affected part of the patient's head can be made sufficiently close to the irradiated part of the neutron beam.

The moving mechanism may support the head support portion so as to be rotatable or swingable about a vertical axis.
According to this configuration, it is possible to finely adjust the orientation of the patient's head with respect to the neutron beam irradiation part, so that the irradiation part can be made closer to the affected part of the patient's head.

  The moving mechanism includes a first shaft member fixed to the treatment table main body, and a first shaft member that slidably supports the head support portion with respect to the first shaft member in the extending direction of the first shaft member. One slide support portion and a first connection portion that connects the head support portion to the first shaft member so as to be rotatable or swingable around the vertical axis may be provided.

  According to the neutron beam irradiation apparatus, since the head support portion is slidably supported with respect to the first shaft member, the patient's head can be moved freely in the extending direction of the first shaft member. it can. Further, in the neutron beam irradiation apparatus, since the head support portion is connected to the first shaft member so as to be rotatable or swingable, it is possible to finely adjust the orientation of the patient head with respect to the irradiation portion. The neutron irradiation part can be made closer to the affected part of the patient's head.

  The moving mechanism includes a first shaft member fixed to the treatment table body, a second shaft member supported by the first shaft member, and a second shaft member with respect to the first shaft member. A first slide support portion that slidably supports the first shaft member in the extending direction of the first shaft member, and the second shaft member is slidable in the extending direction of the second shaft member with respect to the first shaft member A second slide support portion that supports the first shaft member, a first connection portion that supports the first shaft member so that the second shaft member can rotate or swing around the vertical axis, and a second shaft member On the other hand, a second connecting portion that supports the head support portion so as to be rotatable or swingable around the vertical axis may be provided.

  According to the neutron beam irradiation apparatus, since the head support portion is slidably supported with respect to both the first shaft member and the second shaft member, the patient's head can be moved freely in a horizontal plane. be able to. Moreover, in the neutron beam irradiation apparatus, since the second shaft member is connected to the first shaft member so as to be rotatable or swingable, the range in which the patient's head can move can be greatly expanded. . Further, according to the neutron beam irradiation apparatus, since the head support portion is connected to the second shaft member so as to be rotatable or swingable, fine adjustment of the orientation of the patient head with respect to the irradiation portion is possible. Thus, the irradiated part of the neutron beam can be made closer to the affected part of the patient's head.

The said head support part may have an X-ray image acquisition means which receives X-ray irradiation and acquires the X-ray image of a head.
According to this configuration, since the X-ray image can be acquired in a state where the patient's head is fixed to the head support unit, the positioning of the patient head with respect to the irradiation unit is accurately performed based on the X-ray image. It can be carried out.

  ADVANTAGE OF THE INVENTION According to this invention, the affected part of a patient's head can fully approach the irradiation part of a neutron beam.

It is a top view which shows one Embodiment of the neutron beam irradiation apparatus which concerns on this invention. It is a side view which shows the neutron beam irradiation apparatus of FIG. It is a top view which shows the patient treatment table for neutron beam irradiation. It is a side view which shows the patient treatment table for neutron beam irradiation. It is a top view which shows the neutron beam irradiation apparatus in the case of irradiating a patient's head top part with a neutron beam. It is a side view which shows the neutron beam irradiation apparatus of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a neutron beam irradiation apparatus according to the present invention will be described in detail with reference to the drawings. In the following description, two axes orthogonal to each other in the horizontal plane are set as an X axis and a Y axis, and a vertical axis orthogonal to the X axis and the Y axis is set as a Z axis.

  As shown in FIGS. 1 and 2, the neutron beam irradiation apparatus 1 according to the present embodiment irradiates a neutron beam toward an affected part (irradiated body) of a patient's head to which a medicine containing boric acid is administered. Device for [Boron Neutron Capture Therapy]. A neutron beam can be generated by irradiating a target formed of a material such as beryllium, lithium, tantalum, or tungsten with an ion beam made of protons or deuterons.

  The neutron beam irradiation apparatus 1 irradiates a neutron beam from the irradiation unit 3 toward the affected part of the patient A arranged on the patient treatment table 2 for neutron beam irradiation. 1 and 2 show a neutron beam irradiation apparatus 1 for treating an affected part located on the right temporal region of a patient A. FIG. In this case, it is necessary to bring the right side of the patient A close enough to the irradiation unit 3. The irradiation direction of the neutron beam is shown in FIG. 1 as an arrow N1.

  The patient treatment table 2 includes a treatment table main body 4, a body support portion 5, and a head support portion 6. The treatment table body 4 is a member serving as a base of the patient treatment table 2. The treatment table main body 4 is disposed on the floor via legs (not shown). The treatment table body 4 can move on the floor of the facility and can be fixed to the floor surface at an arbitrary position. In addition, the treatment table main body 4 may be supported so as to be movable by a robot arm instead of a leg portion.

  The body support portion 5 is a bed member for supporting the patient A's body. The treatment table body 4 supports the patient's body through the body support portion 5. The body support portion 5 is a bed member having a rectangular shape when viewed from the vertical direction (Z-axis direction), and the longitudinal direction thereof is equal to the Y-axis direction. The body support portion 5 is supported by the slide portion 7 so as to be slidable in the Y-axis direction with respect to the treatment table main body 4. The sliding direction of the body support part 5 is shown as arrow S1. Moreover, the slide part 7 has a clamp function for fixing the body support part 5 at an arbitrary position.

  The patient treatment table 2 may be configured to be movable by a robot arm or the like. Moreover, the patient treatment table 2 does not necessarily need to have the slide part 7. For example, the aspect which the body support part 5 is directly placed on the treatment table main body 4 may be sufficient. Alternatively, the body support 5 may be integrally fixed to the treatment table body 4.

  The head support 6 is a member for supporting the patient A's head. The head support unit 6 includes an imaging plate (X-ray image acquisition means) 8, an imaging plate holder 9, and a pillow unit 10.

  The imaging plate 8 is for receiving an X-ray irradiation and acquiring an X-ray image of the patient's head. For example, X-ray irradiation is performed from above the imaging plate 8 toward the head of the patient A. The rectangular imaging plate 8 is inserted into a square-shaped imaging plate holder 9.

  The B-shaped imaging plate holder 9 is a member that holds the imaging plate 8. The imaging plate holder 9 has a through hole penetrating in the X-axis direction, and the imaging plate 8 is inserted into the through hole.

  The imaging plate holder 9 holds the imaging plate 8 so as to be movable in the X-axis direction, and can change the position of the imaging plate 8 as necessary. The imaging plate holder 9 is formed with a narrow width in the X-axis direction in order to bring the patient's head close to the beam irradiation port of the irradiation unit 3. The imaging plate holder 9 may be configured in a U shape instead of a square shape.

  The pillow part 10 is a part where the head of the patient A is placed. The pillow part 10 is provided on the imaging plate holder 9. The head of the patient A is fixed to the head support 6 by a dedicated fixing tool while being placed on the pillow 10.

  The head support unit 6 is supported by the treatment table body 4 via the moving mechanism 11. The moving mechanism 11 is configured such that the head support unit 6 can move in a horizontal plane (in the XY plane) with respect to the treatment table main body 4.

  FIG. 3 is a plan view showing the patient treatment table 2 of FIG. FIG. 4 is a side view showing the patient treatment table 2 of FIG. As shown in FIGS. 3 and 4, the moving mechanism 11 includes a shaft fixing portion 12, a first shaft member 13, a first slide support portion 14, and a first rotation connection portion (first connection portion) 15. , A second slide support portion 16, a second shaft member 17, and a second rotation connection portion (second connection portion) 18.

  The pair of shaft fixing portions 12 are members that fix both end portions of the first shaft member 13 extending in the X-axis direction to the treatment table main body 4. The pair of shaft fixing portions 12 are fixed to the ends of the treatment table main body 4 in the Y-axis direction. The pair of shaft fixing portions 12 are fixed by being tightened with bolts from the back side of the treatment table main body 4 in a state where the distal end portion 12 a is inserted into the drill hole of the treatment table main body 4. The first shaft member 13 is a round bar-shaped member extending in the X-axis direction.

  The first slide support portion 14, the first rotation connection portion 15, and the second slide support portion 16 are portions that connect the second shaft member 17 to the first shaft member 13. The first slide support portion 14, the first rotation connection portion 15, and the second slide support portion 16 are provided so as to be connected to each other.

  The first slide support portion 14 is a block-like member having a through hole through which the first shaft member 13 is inserted. The first slide support unit 14 slides along the first shaft member 13 in the X-axis direction (the extending direction of the first shaft member 13). The moving direction of the first slide support portion 14 is shown as an arrow S2. The first slide support portion 14 supports the second shaft member 17 so as to be slidable in the X-axis direction with respect to the first shaft member 13.

  The first slide support portion 14 includes a clamp mechanism (not shown) and can be fixed at an arbitrary position on the first shaft member 13. A first rotary connection portion 15 is fixed to the side of the first slide support portion 14 (on the opposite side of the body support portion 5 in the Y-axis direction).

  The first rotary connection portion 15 has a vertical shaft 15a extending in the Z-axis direction. The first rotation connecting portion 15 supports the vertical shaft 15a so as to be rotatable around the Z axis (around the vertical axis 15a). The rotation of the vertical shaft 15a in the first rotation connecting portion 15 is indicated by an arrow R1.

  Moreover, the 1st rotation connection part 15 is provided with the clamp lever 15b. The clamp lever 15b is for fixing the vertical shaft 15a of the first rotary connecting portion 15 at an arbitrary rotational position. A second slide support portion 16 is fixed to the upper end of the vertical shaft 15 a of the first rotary connection portion 15. The 1st rotation connection part 15 has connected the 2nd shaft member 17 with respect to the 1st shaft member 13 so that rotation around the vertical axis 15a is possible.

  The second slide support portion 16 is a block-shaped member having a through hole through which the round shaft-shaped second shaft member 17 is inserted. The second slide support portion 16 slides in the extending direction of the second shaft member 17. The moving direction of the second slide support portion 16 is shown as an arrow S3. The first slide support portion 14 supports the second shaft member 17 with respect to the first shaft member 13 so as to be slidable in the extending direction of the second shaft member 17.

  The second slide support portion 16 includes a clamp lever 16a. The clamp lever 16 a is for fixing the second slide support 16 at an arbitrary position on the second shaft member 17. At one end of the second shaft member 17, a retaining portion 17 a that functions as a retaining member for the second slide support portion 16 is formed.

  A second rotary connection 18 is fixed to the other end of the second shaft member 17. The second rotation connection portion 18 is a member that connects the second shaft member 17 and the head support portion 6. The second rotary connection 18 has a vertical shaft 18a extending in the Z-axis direction. The second rotary connecting portion 18 supports the vertical shaft 18a so as to be rotatable around the Z axis (around the vertical axis 18a). The rotation of the vertical shaft 18a in the second rotation connecting portion 18 is indicated by an arrow R2.

  Further, the second rotary connecting portion 18 includes a clamp lever 18b. The clamp lever 18b is for fixing the vertical shaft 18a of the second rotary connecting portion 18 at an arbitrary rotational position. The head support portion 6 is fixed to the upper end of the vertical shaft 18 a of the second rotary connection portion 18. The second rotation connecting portion 18 connects the head support portion 6 to the second shaft member 17 so as to be rotatable around the vertical axis 18a.

  Next, with reference to FIG.5 and FIG.6, the form of the patient treatment stand 2 in the case of treating the affected part located in the parietal part of the patient A is demonstrated. FIG. 5 is a plan view showing the neutron beam irradiation apparatus 1 when the top of the patient A is irradiated with a neutron beam. FIG. 6 is a side view showing the neutron beam irradiation apparatus 1 of FIG. The irradiation direction of the neutron beam is indicated by an arrow N2.

  When irradiating the top of the patient A with the neutron beam, the top of the patient A and the irradiation unit 3 need to be sufficiently close to each other. Hereinafter, a change from the form of the patient treatment table 2 shown in FIGS. 1 and 2 to the form of the patient treatment table 2 shown in FIGS. 5 and 6 will be described.

  In the patient treatment table 2 of the form shown in FIGS. 1 and 2, first, the second shaft member 17 until the second rotation connection portion 18 that supports the head support portion 6 and the second slide support portion 16 come into contact with each other. Slide. Next, the second shaft member 17 is rotated around the vertical shaft 15 a of the first rotation connection portion 15 so as to be parallel to the first shaft member 13.

  Subsequently, the first slide support portion 14 is moved, and the position is adjusted so that the head support portion 6 is at the center in the width direction (X-axis direction) of the body support portion 5. Thereafter, the body support unit 5 is slid so as to approach the head support unit 6 to form the patient treatment table 2 shown in FIGS. 5 and 6. Thus, by changing the form of the patient treatment table 2, the head support unit 6 is positioned at the end of the patient treatment table 2, and the top of the patient A is made sufficiently close to the irradiation unit 3. Can do.

  According to the neutron beam irradiation apparatus 1 including the patient treatment table 2 for neutron beam irradiation described above, the head support unit 6 is configured to be movable in a horizontal plane with respect to the treatment table body 4. The position of the patient's head can be changed without moving the main body 4. Therefore, according to the neutron beam irradiation apparatus 1, the treatment table body 4 and the body support unit 5 are irradiated with the irradiation unit 3 as compared with the case where the head support unit 6 is integrated with the treatment table body 4 and the body support unit 5. Since only the position of the patient's head can be changed without interfering with the neutron beam, the affected part of the patient's head can be sufficiently brought close to the neutron beam irradiation unit 3.

  Moreover, according to the neutron beam irradiation apparatus 1, since the head support part 6 is slidably supported with respect to both the 1st shaft member 13 and the 2nd shaft member 17, a patient's head within a horizontal surface is supported. The part can be moved freely. Moreover, in the neutron beam irradiation apparatus 1, since the second shaft member 17 is rotatably connected to the first shaft member 13, the range in which the patient's head can move can be greatly expanded. Moreover, according to the neutron beam irradiation apparatus 1, since the head support part 6 is rotatably connected with respect to the 2nd shaft member 17, fine adjustment of the direction of a patient's head with respect to the irradiation part 3 is attained. Thus, the neutron beam irradiation unit 3 can be made closer to the affected part of the patient's head.

  Furthermore, according to the neutron beam irradiation apparatus 1, since the head support unit 6 has the imaging plate 8 that receives X-ray irradiation and acquires an X-ray image of the head, the head of the patient A is An X-ray image can be acquired in a fixed state with respect to the support unit 6. Therefore, the neutron beam irradiation apparatus 1 can accurately position the patient's head with respect to the irradiation unit 3 based on the X-ray image.

  The present invention is not limited to the embodiment described above. For example, the moving mechanism 11 may be configured to be able to move the head support 6 in the Z-axis direction. Specifically, a pantograph-type jack mechanism or the like can be provided between the second rotary connection portion 18 and the head support portion 6. According to such a configuration, when the treatment is performed in a state where the patient is lying down sideways, the height of the head support portion 6 is stably adjusted according to the step between the body and the head. The head can be fixed.

  Moreover, the 1st rotation connection part 15 and the 2nd rotation connection part 18 do not necessarily need to be able to rotate 360 degrees, and the structure which can be rock | fluctuated at an angle of less than 360 degrees may be sufficient.

  Moreover, the structure of the moving mechanism 11 is not restricted to what was mentioned above, What is necessary is just to support the head support part 6 with respect to the treatment table main body 4 so that a movement is possible in a horizontal surface. Here, “movable in the horizontal plane” is not limited to moving only in a strict horizontal direction, but includes moving in a horizontal plane even when moving in a plane inclined with respect to the horizontal plane. .

  Similarly, being rotatable or swingable about the vertical axis is not limited to strictly rotating or swinging about the vertical axis, but rotating or swinging about an axis inclined with respect to the vertical axis. However, it is included in the one that can rotate or swing around the vertical axis.

DESCRIPTION OF SYMBOLS 1 ... Neutron beam irradiation apparatus 2 ... Patient treatment table for neutron beam irradiation 3 ... Irradiation part 4 ... Treatment table body 5 ... Body support part 6 ... Head support part 7 ... Slide part 8 ... Imaging plate (X-ray image acquisition means) DESCRIPTION OF SYMBOLS 9 ... Imaging plate holder 10 ... Pillow part 11 ... Movement mechanism 12 ... Shaft fixing part 13 ... 1st shaft member 14 ... 1st slide support part 15 ... 1st rotation connection part 15a ... Vertical shaft 15b ... Clamp lever 16 ... Slide support portion 16a ... Clamp lever 17 ... Second shaft member 18 ... Second rotation connection portion 18a ... Vertical shaft 18b ... Clamp lever A ... Patient

Claims (8)

A patient treatment table for neutron irradiation on which a patient is placed in neutron irradiation treatment,
A treatment table body for supporting the patient's body;
A head support for supporting the patient's head;
A moving mechanism that movably supports the head support part with respect to the treatment table body in a horizontal plane;
Equipped with a,
The moving mechanism is
A first shaft member fixed to the treatment table body;
A first slide support portion that slidably supports the head support portion in the extending direction of the first shaft member with respect to the first shaft member;
A first connecting portion for connecting the head support portion to the first shaft member so as to be rotatable or swingable around a vertical axis;
A patient treatment table for neutron irradiation, comprising:   2. The patient treatment table for neutron irradiation according to claim 1, wherein the moving mechanism supports the head support portion so as to be rotatable or swingable about a vertical axis. The moving mechanism is
A first shaft member fixed to the treatment table body;
A second shaft member supported by the first shaft member;
A first slide support portion that slidably supports the second shaft member in the extending direction of the first shaft member with respect to the first shaft member;
A second slide support portion that slidably supports the second shaft member in the extending direction of the second shaft member with respect to the first shaft member;
A first connecting portion for connecting the second shaft member to the first shaft member so as to be rotatable or swingable around a vertical axis;
A second connecting portion for connecting the head support portion to the second shaft member so as to be rotatable or swingable around a vertical axis;
A patient treatment table for neutron irradiation according to claim 1. The said head support part has an X-ray image acquisition means which receives X-ray irradiation and acquires the X-ray image of the said head, For neutron irradiation as described in any one of Claims 1-3 Patient treatment table. An irradiating unit for irradiating a neutron beam and a patient treatment table for neutron irradiation for arranging a patient in the irradiation direction of the neutron beam from the irradiating unit;
The patient treatment table for neutron irradiation is:
A treatment table body for supporting the patient's body;
A head support for supporting the patient's head;
A moving mechanism that movably supports the head support part with respect to the treatment table body in a horizontal plane;
Have,
The moving mechanism is
A first shaft member fixed to the treatment table body;
A first slide support portion that slidably supports the head support portion in the extending direction of the first shaft member with respect to the first shaft member;
A first connecting portion for connecting the head support portion to the first shaft member so as to be rotatable or swingable around a vertical axis;
Neutron irradiation apparatus comprising: a. The neutron beam irradiation apparatus according to claim 5 , wherein the moving mechanism supports the head support portion so as to be rotatable or swingable about a vertical axis. The moving mechanism is
A first shaft member fixed to the treatment table body;
A second shaft member supported by the first shaft member;
A first slide support portion that slidably supports the second shaft member in the extending direction of the first shaft member with respect to the first shaft member;
A second slide support portion that slidably supports the second shaft member in the extending direction of the second shaft member with respect to the first shaft member;
A first connecting portion for connecting the second shaft member to the first shaft member so as to be rotatable or swingable around a vertical axis;
A second connecting portion for connecting the head support portion to the second shaft member so as to be rotatable or swingable around a vertical axis;
A neutron beam irradiation apparatus according to claim 5 . The neutron beam irradiation apparatus according to any one of claims 5 to 7 , wherein the head support unit includes an X-ray image acquisition unit that receives X-ray irradiation and acquires an X-ray image of the head. .

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