Treatment facilities and radiation therapy equipment

Abstract

The present invention provides treatment equipment and a radiation therapy device that can reduce the size of the treatment room while minimizing the limitations on the range of motion of the treatment table. [Solution] During the first slide, the movable door 70 slides to the left in the lateral direction D1 relative to the irradiation port 55a, and during the second slide, the movable door 70 slides to the right in the lateral direction D1 relative to the irradiation port 55a. In other words, when the movable door 70 slides to one side in the lateral direction D1, there is no movable door 70 on the other side, and when it slides to the other side in the lateral direction D1, there is no movable door 70 on one side. Therefore, when the treatment table 60 moves to be close to the wall 103 (as shown in Figures 5(a) and 5(b)), the movable door 70 can be slid to the opposite side of the treatment table 60 to secure space for the treatment table 60. At this time, the movable door 70 does not need to be moved further away from the irradiation port 55a than necessary to prevent interference with the treatment table 60.

Description

Technical Field

[0001] The present invention relates to treatment equipment and a radiation therapy device.

Background Art

[0002] As a neutron capture therapy for irradiating neutron rays to kill cancer cells, boron neutron capture therapy (BNCT: Boron Neutron Capture Therapy) using a boron compound is known. In boron neutron capture therapy, neutron rays are irradiated to boron that has been previously incorporated into cancer cells, and the cancer cells are selectively destroyed by the scattering of the heavy charged particles generated thereby.

[0003] As a radiation therapy device as described above, for example, the one shown in Patent Document 1 is known. The radiation therapy device shown in Patent Document 1 performs treatment by arranging it in front of the irradiation port of neutron rays with the patient fixed to the mounting member. Therefore, the patient is positioned in the preparation room, transported to the treatment room, and positioned again.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the aforementioned radiotherapy devices, a movable door was sometimes provided to cover the radiation source in order to suppress radiation leakage from the radiation source. Such a movable door was divided into a pair of door members and had a mechanism that allowed each door member to slide simultaneously to the left and right sides of the radiation source. Therefore, the movable door was opened when treatment was being performed and closed when treatment was not being performed. In radiotherapy devices, the treatment table on which the patient was fixed was sometimes positioned in various directions and orientations depending on the treatment content. In this case, the range of movement of the treatment table was sometimes restricted to prevent interference between the treatment table and the open plate. Alternatively, there was a problem in that the treatment room space had to be enlarged to secure space to open the movable door without interference with the treatment table.

[0006] Therefore, the present invention aims to provide treatment equipment and a radiotherapy apparatus that can reduce the constraints on the range of movement of the treatment table while suppressing the size of the treatment room. [Means for solving the problem]

[0007] The treatment equipment according to the present invention is a treatment equipment that performs treatment by irradiating a target with radiation, comprising: an irradiation unit for irradiating radiation; a wall portion provided with an irradiation port for the irradiation unit; and a movable door provided opposite the wall portion so as to cover the irradiation port, wherein the movable door slides along the wall portion to both sides in the lateral direction relative to the irradiation port.

[0008] The treatment equipment according to the present invention comprises a wall section provided with an irradiation port of an irradiation unit, and a movable door provided opposite the wall section so as to cover the irradiation port. Therefore, when treatment is not being performed, the movable door covers the irradiation port, thereby suppressing the leakage of radiation into the treatment room. The movable door slides along the wall section to both sides in the lateral direction relative to the irradiation port. Therefore, during treatment, the movable door slides to allow radiation to be irradiated from the irradiation port. In other words, unlike a structure in which a pair of door members slide simultaneously to both the left and right sides, when the movable door slides to one side in the lateral direction, the movable door is not present on the other side, and vice versa. Therefore, when the treatment table moves closer to the wall section, the movable door can be slid to the opposite side of the treatment table to secure space for the treatment table. At this time, the movable door does not need to be moved further away from the irradiation port than necessary to prevent interference with the treatment table. Therefore, the treatment room does not need to be made unnecessarily large to secure space for the movable door after it has slid. Therefore, it is possible to reduce the size of the treatment room while also reducing the limitations on the range of motion of the treatment table.

[0009] During the first slide, the movable door may slide laterally to one side relative to the irradiation port, and during the second slide, the movable door may slide laterally to the other side relative to the irradiation port. This allows for a state where, during the first slide, there is no movable door on the other side, and during the second slide, there is no movable door on one side.

[0010] The treatment equipment may further include a guide section provided on one of the upper and lower ends of the movable door to guide the lateral sliding of the movable door, and a restricting section provided on the other of the upper and lower ends of the movable door to restrict the movement of the movable door in the thickness direction. This allows the movable door to slide smoothly and without rattling.

[0011] The treatment equipment further comprises a treatment table on which the irradiated body is placed, and a control unit that performs calculations related to the treatment. The control unit may calculate the orientation and position of the treatment table and determine the sliding direction of the movable door based on the treatment plan. This allows the control unit to determine the operation of the treatment table and the movable door based on the treatment plan.

[0012] The control unit may control the movable door so that it slides in the determined sliding direction. In this case, the movable door can be controlled automatically.

[0013] The treatment equipment further includes a detection unit for detecting the position of the movable door, and the detection unit may be located on the ceiling side. By positioning the detection unit at a high position in this way, it is possible to suppress the detection unit from falsely detecting the worker or other components inside the treatment room.

[0014] The radiation can be neutron beams. In this case, the above-mentioned effects can be obtained during neutron capture therapy, where the range of movement of the treatment table is large.

[0015] The radiotherapy apparatus according to the present invention is a radiotherapy apparatus that performs treatment by irradiating a target body with radiation, comprising: an irradiation unit that irradiates radiation; and a movable door provided so as to cover the irradiation port of the irradiation unit and facing a wall on which the irradiation port is provided, wherein the movable door slides along the wall on both sides in the lateral direction relative to the irradiation port.

[0016] This radiation therapy device can achieve the same effects and benefits as the aforementioned treatment equipment. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide treatment equipment and a radiotherapy apparatus that can reduce the constraints on the range of movement of the treatment table while suppressing the size of the treatment room. [Brief explanation of the drawing]

[0018] [Figure 1] This is a schematic diagram of a treatment facility and a radiation therapy apparatus according to an embodiment of the present invention. [Figure 2]It is a schematic diagram of a treatment facility and a radiation therapy device according to an embodiment of the present invention. [Figure 3] It is a front view showing the structure of a movable door. [Figure 4] It is a side view showing the structure of a movable door. [Figure 5] It is a schematic diagram showing the sliding mode of a movable door. [Figure 6] It is a diagram showing the positional relationship between a detection unit and a movable door.

Embodiments for Carrying out the Invention

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0020] FIG. 1 is a schematic diagram showing a treatment facility 100 and a radiation therapy device 1 according to an embodiment of the present invention. In this embodiment, as the radiation therapy device 1, a neutron capture therapy device that performs cancer treatment using boron neutron capture therapy (BNCT) is exemplified. Note that the radiation therapy device 1 is not limited to a neutron capture therapy device, and a radiation therapy device such as an X-ray, proton beam, or heavy particle beam may be adopted.

[0021] As shown in FIG. 1, the treatment facility 100 includes a radiation therapy device 1, a treatment room 101 for treating a patient 50 (irradiated object) by the radiation therapy device 1, and an accelerator room 102 in which an accelerator 2 described later is arranged. Further, the treatment facility 100 includes a wall portion 103 that partitions the treatment room 101 and the accelerator room 102.

[0022] Referring to FIG. 2, the radiation therapy device 1 will be described. The radiation therapy device 1 irradiates a tumor of a patient 50 to whom, for example, boron ( 10 B) has been administered with a neutron beam N. The radiation therapy device 1 includes an accelerator 2. The accelerator 2 accelerates particles and emits a particle beam R. For example, as the accelerator 2, a cyclotron, a linear accelerator, or the like may be adopted.

[0023] The particle beam R emitted from accelerator 2 is transported to target placement section 30 by passing through a transport path 9, called a beam duct, which is kept under vacuum and through which the beam can pass. The target placement section 30 is where the target 10 is placed and has a mechanism to hold the target 10 in the orientation required for irradiation. The target placement section 30 places the target 10 at a position opposite the end of the transport path 9. The particle beam R emitted from accelerator 2 travels through the transport path 9 and proceeds towards the target 10 located at the end of the transport path 9. Multiple electromagnets 4 (such as quadrupole electromagnets) and scanning electromagnets 6 are provided along this transport path 9. The multiple electromagnets 4 are used, for example, to adjust the beam axis of the particle beam R.

[0024] The scanning electromagnet 6 scans the particle beam R and controls the irradiation of the particle beam R onto the target 10. The scanning electromagnet 6 controls the irradiation position of the particle beam R onto the target 10.

[0025] The radiotherapy device 1 generates a neutron beam N by irradiating a target 10 with a particle beam R, and emits the neutron beam N toward the patient 50. The radiotherapy device 1 is equipped with a target 10, a shield 8, a moderator 39, and a collimator 20.

[0026] Target 10 generates neutron beams N upon irradiation with particle beam R. Target 10 is a solid component formed from a material that generates neutron beams N upon irradiation with particle beam R. Specifically, Target 10 is formed from, for example, beryllium (Be), lithium (Li), tantalum (Ta), or tungsten (W), and takes the form of a solid disc with a diameter of, for example, 160 mm. However, Target 10 is not limited to a disc shape and may take other shapes.

[0027] The moderator 39 slows down the neutron beam N generated in the target 10 (reduces the energy of the neutron beam N). The moderator 39 may have a layered structure consisting of a layer 39A that mainly slows down fast neutrons contained in the neutron beam N and a layer 39B that mainly slows down epithermal neutrons contained in the neutron beam N.

[0028] The shielding body 8 is designed to prevent the generated neutron beam N and the gamma rays and other particles produced as a result of the generation of the neutron beam N from being emitted to the outside. The shielding body 8 is installed so as to surround the moderator 39. The upper and lower parts of the shielding body 8 extend upstream of the particle beam R from the moderator 39.

[0029] The collimator 20 shapes the irradiation field of the neutron beam N and has an irradiation port 55a through which the neutron beam N passes. The collimator 20 is, for example, a block-shaped member having an irradiation port in the center. The collimator 20 is attached to the wall 103 of the area where the neutron beam N is irradiated into the treatment room 101.

[0030] The accelerator 2, transport path 9, target 10, moderator 39, and collimator 20 described above constitute the irradiation unit 55 that irradiates with neutron beams. The irradiation port of the collimator 20 corresponds to the irradiation port 55a of the irradiation unit 55. The irradiation port 55a of the irradiation unit 55 is provided in the wall 103. The collimator 20 does not necessarily have to be provided in the wall 103, but may be provided in the treatment table 60. The horizontal direction along the wall 103 is defined as the lateral direction D1. The direction in which the irradiation axis of the neutron beam N irradiated from the irradiation port 55a extends is defined as the front-back direction D2.

[0031] The radiotherapy apparatus 1 has a mobile mechanism 110. The mobile mechanism 110 has a base portion 111 provided on the floor surface at a predetermined distance from the irradiation port 55a. The base portion 111 is a member that extends in the vertical direction, is rotatable around an axis that extends in the vertical direction, and is also able to move up and down in the vertical direction. The base portion 111 has an arm portion 112 that extends in the horizontal direction. A support portion 113 that supports the treatment table 60 is provided at the tip of the arm portion 112. The arm portion 112 can extend and retract so that the position of the support portion 113 can be changed. The arm portion 112 can also adjust the inclination of the support portion 113. The support portion 113 is rotatable around an axis that extends in the vertical direction at the tip of the arm portion 112.

[0032] The radiotherapy apparatus 1 is equipped with a movable door 70. The movable door 70 is provided so as to face the wall 103 so as to cover the irradiation port 55a. The movable door 70 is positioned between the wall 103 and the moving mechanism 110. The movable door 70 is provided so as to extend vertically and horizontally D1 so as to face the wall 103. The thickness direction of the movable door 70 is positioned to coincide with the front-to-back direction D2. When viewed from the front, the movable door 70 is positioned so as to cover the entire area of ​​the irradiation port 55a (see Figure 3). The movable door 70 has a rectangular shape (see Figure 3), but is not limited to this and may be modified as appropriate. The size of the gap between the movable door 70 and the surface 103a of the wall 103 is set to a size that can suppress radiation leakage from the irradiation port 55a. If the collimator 20 protrudes from the surface 103a of the wall 103, the movable door 70 is positioned so as not to interfere with the tip of the collimator 20. The material of the movable door 70 is not particularly limited as long as it is a material that can shield against radiation, and can be made of materials such as lead, iron, or concrete.

[0033] The details of the movable door 70 will be explained with reference to Figures 3 to 5. In the following explanation, "left" and "right" will be used based on the orientation when viewing the irradiation port 55a from within the treatment room 101. As shown in Figures 3 and 5, the movable door 70 slides along the wall 103 to both sides in the lateral direction D1 relative to the irradiation port 55a. That is, the movable door 70 can slide to the left in the lateral direction D1 relative to the irradiation port 55a (see Figure 5(a)). The movable door 70 can slide to the right in the lateral direction D1 relative to the irradiation port 55a (see Figure 5(b)). Unlike doors in which a pair of door members slide simultaneously to the left and right, the movable door 70 is formed indivisibly. During the first slide, the movable door 70 slides to the left in the lateral direction D1 relative to the irradiation port 55a, and during the second slide, the movable door 70 slides to the right in the lateral direction D1 relative to the irradiation port 55a. Therefore, when the movable door 70 slides to the left of the irradiation port 55a, the entire movable door 70 slides to the left, and the movable door 70 is not present on the right side of the irradiation port 55a.

[0034] As shown in Figures 3 and 4, the radiotherapy apparatus 1 comprises a guide unit 71, a drive unit 72, and a regulating unit 73. The guide unit 71 and the drive unit 72 are provided on the upper end side of the movable door 70. The regulating unit 73 is provided on the lower end side of the movable door 70.

[0035] The guide portion 71 is a member that guides the sliding of the movable door 70 in the lateral direction D1. The guide portion 71 is provided on the wall portion 103 above the movable door 70 so as to extend in the lateral direction D1. The movable door 70 comprises a pair of column portions 74 extending upward from the upper end and a pair of wheel portions 76 provided on each column portion 74. The column portions 74 rotatably support the wheel portions 76. The wheel portions 76 are arranged so that their axis of rotation extends in the front-rear direction D2. The wheel portions 76 are placed on the upper end of the guide portion 71 on their outer circumferential surface. As a result, the movable door 70 slides in the lateral direction D1 as the wheel portions 76 travel on the guide portion 71.

[0036] The drive unit 72 is a mechanism that provides driving force to the movable door 70 for sliding. The drive unit 72 is provided between the movable door 70 and the guide unit 71. The drive unit 72 comprises a drive pulley 77, a driven pulley 78, a belt 79, and a connecting unit 80. The pulleys 77 and 78 are arranged so that their rotation axes extend in the front-rear direction D2. The drive pulley 77 is located on one end (right side) of the drive unit 72 in the lateral direction D1. The driven pulley 78 is located on the other end (left side) of the drive unit 72 in the lateral direction D1. The drive pulley 77 is connected to a motor (not shown) and is a pulley that provides driving force to the belt 79 by rotating. The belt 79 is an annular endless belt. The belt 79 is stretched over the drive pulley 77 and the driven pulley 78. The belt 79 has an upper portion 79a that spans the upper end of the drive pulley 77 and the upper end of the driven pulley 78, and a lower portion 79b that spans the lower end of the drive pulley 77 and the lower end of the driven pulley 78. The connecting portion 80 connects the column portion 74 and the upper portion 79a of the belt 79. As a result, when the drive pulley 77 rotates, a driving force is applied to the movable door 70 via the belt 79, the connecting portion 80, and the column portion 74, allowing it to slide in the lateral direction D1.

[0037] The restricting portion 73 is a member that restricts the movement of the movable door 70 in the thickness direction, in this case, the front-to-back direction D2. The restricting portion 73 is provided on the lower side of the movable door 70 within the wall portion 103, extending in the lateral direction D1. The restricting portion 73 has a groove portion 73a on its upper surface that extends along the lateral direction D1. The movable door 70 comprises a pair of column portions 81 extending downward from the lower end, and a pair of roller portions 82 provided on each column portion 81. The column portions 81 rotatably support the roller portions 82. The roller portions 82 are arranged so that their axis of rotation extends in the vertical direction. The roller portions 82 are inserted into the groove portion 73a. As a result, when the movable door 70 is sliding in the lateral direction D1, the roller portions 82 are guided by the groove portion 73a, thereby restricting the movement of the movable door 70 in the front-to-back direction D2.

[0038] The radiotherapy apparatus 1 includes a detection unit 86 for detecting the position of the movable door 70, as shown in Figure 6. The detection unit 86 is located on the ceiling side. That is, the detection unit 86 is located higher than the irradiation port 55a. In the example shown in Figure 6, the radiotherapy apparatus 1 has detection units 86A, 86B, 86C, and 86D. Detection units 86A and 86B detect that the movable door 70 is positioned at position PG1 to cover the irradiation port 55a. Detection units 86A and 86B are located to the left and right of the irradiation port 55a, respectively. Detection unit 86C detects that the movable door 70 is positioned at the left retraction position PG2. Detection unit 86C is located to the left and spaced further apart than detection unit 86A. Detection unit 86D detects that the movable door 70 is positioned at the right retraction position PG3. Detection unit 86D is located to the right and spaced further apart than detection unit 86B.

[0039] As shown in Figure 2, the radiotherapy apparatus 1 comprises a control unit 150 that controls various devices and a storage unit 151 that stores various information used for control. The control unit 150 controls the irradiation unit 55, the moving mechanism 110, and the movable door 70. The control unit 150 performs calculations related to the treatment for the radiotherapy apparatus 1 to perform treatment. The storage unit 151 stores various data necessary for the control unit 150 to perform calculations related to the treatment. The control unit 150 acquires treatment plan data, which defines the plan for what kind of treatment the radiotherapy apparatus 1 will perform. The treatment plan includes the location of the affected area of ​​the patient 50, the posture of the patient 50, and the dose of neutron beam N to be irradiated to the patient 50.

[0040] The control unit 150 calculates the orientation and position of the treatment table 60 based on the treatment plan and determines the sliding direction of the movable door 70. For example, as shown in Figure 1, the control unit 150 can decide to position the treatment table 60 so that it extends in the front-rear direction D2 in front of the irradiation port 55a. In this case, the control unit 150 may set the sliding direction of the movable door 70 to either the right or the left.

[0041] Furthermore, as shown in Figure 5(a), the control unit 150 can decide to position the treatment table 60 so that the head end is positioned in front of the irradiation port 55a and extends to the right. In this case, the control unit 150 determines the sliding direction of the movable door 70 to the left. Furthermore, as shown in Figure 5(b), the control unit 150 can decide to position the treatment table 60 so that the head end is positioned in front of the irradiation port 55a and extends to the left. In this case, the control unit 150 determines the sliding direction of the movable door 70 to the right.

[0042] The control unit 150 controls the movable door 70 so that it slides in the determined sliding direction. Specifically, when the control unit 150 slides the movable door 70 to the left, it sends a control signal to the drive unit 72 (see Figure 3) and slides the movable door 70 to the left. When the control unit 150 detects the movable door 70 with the left detection unit 86C, it stops the sliding. When the control unit 150 slides the movable door 70 to the right, it sends a control signal to the drive unit 72 (see Figure 3) and slides the movable door 70 to the right. When the control unit 150 detects the movable door 70 with the right detection unit 86D, it stops the sliding. The control unit 150 controls the moving mechanism 110 so that the treatment table 60 is positioned in the determined orientation and direction. When the treatment is completed, the control unit 150 returns the treatment table 60 to its original position and returns the movable door 70 to the position of the irradiation port 55a based on the detection results of the detection units 86A and 86B.

[0043] Next, the operation and effects of the treatment equipment 100 and the radiation therapy device 1 according to this embodiment will be described.

[0044] The treatment equipment 100 according to this embodiment includes a wall portion 103 on which an irradiation port 55a of the irradiation unit 55 is provided, and a movable door 70 provided opposite the wall portion 103 so as to cover the irradiation port 55a. Therefore, when treatment is not being performed, the movable door 70 covers the irradiation port 55a, thereby suppressing the leakage of radiation into the treatment room 101. The movable door 70 slides along the wall portion 103 on both sides in the lateral direction D1 with respect to the irradiation port 55a. Therefore, during treatment, the movable door 70 slides to allow radiation to be irradiated from the irradiation port 55a. Here, as a comparative example, a structure in which the movable door has a pair of door members and opens so that the pair of door members slide simultaneously on both the left and right sides. In the structure according to this comparative example, the door member on one side in the lateral direction D1 slides to one side in the lateral direction D1, and the door member on the other side in the lateral direction D1 slides to the other side in the lateral direction D1. As a result, there are door members on both sides in the lateral direction D1 with respect to the irradiation port 55a. In contrast, in the treatment equipment 100 according to this embodiment, the movable door 70 differs from the structure in which a pair of door members slide simultaneously to both the left and right sides. When sliding to one side in the lateral direction D1, the movable door 70 is not present on the other side, and when sliding to the other side in the lateral direction D1, the movable door 70 is not present on one side. Therefore, when the treatment table 60 moves to approach the wall 103 (as shown in Figures 5(a) and 5(b)), the movable door 70 can be slid to the opposite side of the treatment table 60 to secure space for the treatment table 60. At this time, the movable door 70 does not need to be moved further away from the irradiation port 55a than necessary to prevent interference with the treatment table 60. Consequently, the treatment room 101 does not need to be made unnecessarily large to secure space for the movable door 70 after sliding. As a result, the constraints on the range of movement of the treatment table 60 can be reduced while suppressing the size of the treatment room 101.

[0045] Furthermore, during the first slide, the movable door 70 slides to the left (one side) in the lateral direction D1 relative to the irradiation port 55a, and during the second slide, the movable door 70 slides to the right (the other side) in the lateral direction D1 relative to the irradiation port 55a. During the first slide, the movable door 70 is not present on the other side, and during the second slide, the movable door 70 is not present on one side.

[0046] The treatment equipment 100 may further include a guide portion 71 provided on one of the upper and lower ends of the movable door 70 to guide the sliding of the movable door 70 in the lateral direction D1, and a restricting portion 73 provided on the other of the upper and lower ends of the movable door 70 to restrict movement in the front-rear direction D2 (the thickness direction of the movable door). This allows the movable door 70 to slide smoothly and without rattling.

[0047] The treatment equipment 100 further comprises a treatment table 60 on which the irradiated body is placed, and a control unit 150 that performs calculations related to the treatment. The control unit 150 may calculate the orientation and position of the treatment table 60 and determine the sliding direction of the movable door 70 based on the treatment plan. This allows the control unit 150 to determine the operation of the treatment table 60 and the movable door 70 based on the treatment plan.

[0048] The control unit 150 may control the movable door 70 so that it slides in the determined sliding direction. In this case, the movable door 70 can be automatically controlled.

[0049] The treatment equipment 100 further includes a detection unit 86 for detecting the position of the movable door 70, and the detection unit 86 may be located on the ceiling side. By positioning the detection unit 86 at a high position in this way, it is possible to suppress false detection of the worker or other components inside the treatment room 101.

[0050] The radiation may be neutron radiation. In this case, the above-mentioned effects can be obtained during neutron capture therapy, where the range of movement of the treatment table 60 is larger.

[0051] The radiotherapy apparatus 1 according to this embodiment is a radiotherapy apparatus 1 that performs treatment by irradiating a target body with radiation, and comprises an irradiation unit 55 for irradiating radiation, and a movable door 70 provided so as to cover the irradiation port 55a of the irradiation unit 55 and facing a wall 103 on which the irradiation port 55a is provided, wherein the movable door 70 slides along the wall 103 on both sides in the lateral direction D1 with respect to the irradiation port 55a.

[0052] This radiation therapy device 1 can achieve the same effects and benefits as the treatment equipment 100 described above.

[0053] The present invention is not limited to the embodiments described above.

[0054] For example, the structures of the treatment equipment and radiation therapy apparatus shown in Figures 1 and 2 are merely examples and can be modified as appropriate. Furthermore, the drive mechanism for the movable door 70 is not limited to those shown in Figures 3 and 4 and can be modified as appropriate. [Explanation of symbols]

[0055] 1...Radiation therapy device, 50...Patient (irradiated body), 55...Irradiation unit, 55a...Irradiation port, 60...Treatment table, 70...Movable door, 72...Guide member, 73...Regulating member, 150...Control unit.

Claims

1. A treatment facility that uses radiation to treat an object to be irradiated, The irradiation unit that irradiates with the aforementioned radiation, The wall portion on which the irradiation port of the aforementioned irradiation unit is provided, It includes a movable door that is provided so as to face the wall portion so as to cover the irradiation port, The movable door slides along the wall on both sides in the lateral direction relative to the irradiation port, as part of the treatment equipment.

2. During the first slide, the movable door slides to one side in the lateral direction relative to the irradiation opening. During the second slide, the movable door slides to the other side in the lateral direction relative to the irradiation port, as described in claim 1.

3. A guide portion is provided on either the upper or lower end of the movable door, which guides the sliding of the movable door in the lateral direction, The treatment apparatus according to claim 1, further comprising: a restricting portion provided on the other end of the upper and lower ends of the movable door for restricting the movement of the movable door in the thickness direction.

4. A treatment table on which the irradiated object is placed, It further comprises a control unit that performs calculations related to treatment, The treatment equipment according to claim 1, wherein the control unit calculates the orientation and position of the treatment table and determines the sliding direction of the movable door based on the treatment plan.

5. The treatment equipment according to claim 4, wherein the control unit controls the movable door so that it slides in the determined sliding direction.

6. The system further includes a detection unit for detecting the position of the movable door, The detection unit is provided on the ceiling side, as described in claim 1.

7. The treatment equipment according to claim 1, wherein the radiation is neutron radiation.

8. A radiation therapy device that performs treatment by irradiating a target body with radiation, The irradiation unit that irradiates with the aforementioned radiation, The irradiation unit includes a movable door that covers the irradiation port and is positioned opposite the wall on which the irradiation port is provided, A radiotherapy apparatus in which the movable door slides along the wall on both sides in the lateral direction relative to the irradiation port.

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