JP5154896B2 - Rotating irradiation treatment device - Google Patents

Description

  The present invention relates to a rotary irradiation therapy apparatus such as a rotary gantry used for particle beam therapy.

  In the conventional rotary irradiation treatment apparatus, the rotating ring that takes the weight of the entire apparatus is constituted by a one-piece integrated structure without a joint (for example, Patent Document 1).

JP 2003-250917 A

  Conventionally, the rotary ring of the rotary irradiation treatment apparatus has been formed as a one-piece integrated structure without a seam. The reason is that when there is a seam on the outer periphery of the rotating ring, the rotating ring seam and the roller supporting the weight of the rotating ring come into contact with each other due to the rotation of the irradiation device, and the generation of noise and vibration caused by the step of the seam is avoided. Because of that. For the rotating ring, a member having high strength and high wear resistance such as a large-sized casting ring has been used in order to support the heavy object and ensure the positional accuracy of the entire rotating structure. For this reason, there are only a few manufacturers that can manufacture a rotating ring, which is a one-piece structure with no joints, and there is a problem that the purchase cost increases and a long delivery time.

  The present invention was made to solve the above problems, and without using a seamless one-circle integrated structure, a plurality of arc-shaped members are combined to form a rotating ring, An object of the present invention is to provide a rotary irradiation treatment apparatus that enables irradiation of a particle beam to a patient from all 360 ° directions without causing noise and vibration.

The rotary irradiation treatment apparatus according to the present invention is formed by connecting a plurality of arc-shaped members, and is arranged so as to be in contact with a rotating ring disposed so as to be rotatable around a central axis, between adjacent connecting portions of the rotating rings. A roller that supports and drives the rotating ring, a particle beam irradiation head that is attached to the rotating ring via a frame and irradiates a particle beam toward the central axis, and the particle beam irradiation head is a first irradiation head And a second irradiation head for the first particle beam emitted from the first irradiation head, and an irradiation course for the second particle beam emitted from the second irradiation head. The first irradiation head and the second irradiation head are attached to the frame so as to cross each other at an arbitrary angle around the central axis .

  According to the rotary irradiation treatment apparatus of the present invention, since the rotating ring is formed by connecting a plurality of arc-shaped members, it is possible to reduce the purchase cost as compared with the case of a one-circle integrated structure, and the delivery time Has the effect of shortening.

Embodiment 1 FIG.
The basic structure and features of the rotary irradiation treatment apparatus according to Embodiment 1 of the present invention will be described.
In particle beam therapy using proton beams or the like, the radiation source is a particle accelerator. The particle accelerator is a very large device, and it is difficult to rotate the radiation source around the affected area. Therefore, the rotary irradiation treatment apparatus is configured to perform irradiation by injecting the particle beam in the direction of the rotation center of the rotation frame and once deflecting the particle beam outward by the deflecting electromagnet, and then bending it toward the affected part on the rotation center axis. Yes.

FIG. 1 is a cross-sectional side view of a main part of a rotary irradiation treatment apparatus according to the present invention, and FIG. 2 is a bird's-eye view showing the main part of the rotary irradiation treatment apparatus, and a central axis (z-axis direction; z) indicated by a dashed line in FIG. When the axis is a horizontal direction, the x-axis is arranged so as to be orthogonal to the z-axis in the horizontal plane, and the y-axis is the vertical direction. A roller 4 that supports and drives the rotating ring 3 in contact with the rotating ring 3, and is attached to the rotating ring 3 via the frame 1 and includes particle beam irradiation heads 9a and 9b that irradiate the particle beam toward the central axis. .
In the present invention, as shown in the side view of the main part on the xy plane in FIG. 3 (the view of the apparatus observed in the depth direction from the entrance side of the irradiation chamber 13), the rotating ring 3 is an arc-shaped member (half-half) with a central angle of 180 °. (Arc-shaped members) 3a and 3b are combined to form a ring shape, and two adjacent connecting portions 18 (shown by bold solid lines) that become seams of the arc-shaped members 3a and 3b. The roller 4 comes into contact with the outer peripheral surface except for both ends of the arcuate member 3b, and supports and drives the rotating ring 3.

In addition, a counter balance 2a (2b) is attached to the rotary frame 1 at a position facing the deflecting electromagnet 8a (8b), which is a heavy body, with the center axis interposed therebetween in order to correct the center of gravity unbalance of rotation. (In FIG. 1, the counter balance 2b arranged in front of the sheet is omitted).
The rotating ring 3 is provided at two locations upstream (in the direction of the beam) and downstream of the rotating frame 1. As described above, the rotary irradiation treatment apparatus has a structure in which the weight of the main rotary irradiation treatment apparatus such as a particle beam irradiation head is applied to the roller 4 that supports and drives the rotation ring 3 via the rotation ring 3.

  Note that at least one roller 4 in the apparatus includes a drive roller 4a. The driving roller 4 a is connected to the driving device 5, supports the weight of the rotary irradiation treatment apparatus, and is applied to the entire rotary irradiation treatment apparatus via the rotation ring 3 by the frictional force between the support surface and the outer peripheral surface of the rotation ring 3. A driving force is applied, and the number arranged depends on the weight of the rotary irradiation treatment apparatus, the capacity of the driving source, and the like (in the example of FIG. One drive roller 4a is included in the rollers 4 arranged in this manner.

  The support roller 4 b is a member provided to support the weight of the entire rotary irradiation treatment apparatus other than the roller 4, and freely rotates following the rotation of the rotating ring 3. The roller 4 is composed of a combination of a single drive roller or a plurality of drive rollers 4a and a plurality of support rollers 4b, and is disposed on the outer peripheral lower surface of each rotating ring 3 (in FIGS. 2 and 3, the shape of the roller 4 is shown). It is described as a single circle or cylinder. As shown in FIGS. 2 and 3, one rotating ring 3 is supported by rollers 4 arranged at two locations.

  The support surface of the roller 4 is in contact with the outer peripheral surface of the rotating ring 3, and the accuracy of the rotation center and the degree of vibration and noise of the entire rotating body are determined by the rotational symmetry accuracy and rotation of the support surface of the roller 4. This greatly depends on the accuracy of the rotational symmetry of the outer peripheral surface of the rotating ring 3 that serves as a reference surface for the position of the entire radiation therapy apparatus.

  As shown in FIGS. 1 to 3, in the rotary irradiation treatment apparatus according to the first embodiment, two particle beam irradiation heads (two beam irradiation courses) for irradiating the particle beam toward the central axis are provided. A first particle beam irradiation head (first irradiation head) 9a that irradiates a beam (first particle beam) vertically downward with respect to a central axis extending in the horizontal direction at the illustrated reference position, and the particle beam A second particle beam irradiation head disposed at a position rotated by 90 ° about the central axis (z axis) from the position of the irradiation head 9a and irradiating a beam (second particle beam) in the horizontal direction with respect to the central axis. (Second irradiation head) 9b is provided. When the rotating ring 3 rotates, the irradiation direction of the beam changes depending on the rotation angle, but the arrangement of the first and second particle beam irradiation heads 9a and 9b on the rotating frame 1 remains fixed. Therefore, the difference in the arrangement angle of 90 ° is maintained.

  Other configurations of the rotary irradiation treatment apparatus include vacuum ducts 6, 6 a, 6 b for passing a particle beam to be irradiated to a patient, deflection electromagnets 7, 8 a, 8 b for deflecting the particle beam to a predetermined angle, and an irradiation area of the particle beam Are provided with particle beam irradiation heads 9a and 9b (beam irradiation positions) for irradiating the affected area with particle beams by adjusting the shape into a shape suitable for treatment or changing energy. The deflection electromagnet 7 and the vacuum duct 6 are supported inside the cone frame 10 arranged on the radiation source side (left side in FIG. 1) of the apparatus, and support cables and the like outside the cone frame 10 (outside). Yes. The vacuum duct 6, the deflecting electromagnets 7, 8a, 8b, the particle beam irradiation heads 9a, 9b, and the cone frame 10 are configured to rotate integrally with the rotating frame 1. The vacuum duct 6 is connected to a vacuum duct (not shown) outside the rotary irradiation treatment apparatus through which a particle beam emitted from a particle accelerator (not shown) passes, by a rotary joint or the like. It can be rotated around its axis.

  At the time of treatment, the patient 14 lies on the treatment table (treatment bed) 11 fixed to the beam 12 outside the device (or may be in a prone posture depending on the physical condition of the patient 14), and the rotary irradiation treatment device. It is guided by driving of the beam 12 into the space secured inside (inside the irradiation chamber 13. When the irradiation chamber 13 is simply a space generated inside the rotating frame 1, the structure of the wall surface is not necessary). The beam 12 is supported and driven by the floor of the treatment room (building side) provided with the rotary irradiation treatment apparatus. Further, the treatment table 11 is configured to be capable of rotating 180 ° in the horizontal direction, and can be moved while maintaining the level of the upper surface in the alignment of the patient 14 during the treatment.

  Next, the operation of the rotary irradiation treatment apparatus will be described. First, the driving force is transmitted from the driving roller 4a by the frictional force between the contact surfaces of the driving roller 4a and the rotating ring 3, and the entire rotary irradiation treatment apparatus rotates to the optimum angle for irradiation. After fixing the rotation angle of the rotary irradiation treatment apparatus, a particle beam emitted from a particle accelerator (not shown) is incident on the vacuum duct 6 through a beam transport device (not shown) (incident on the left side of FIG. 1). Directions are indicated by arrows.) The particle beam incident on the vacuum duct 6 passes through the deflection electromagnet 7, passes through the vacuum duct 6 a or 6 b, passes through the deflection electromagnet 8 a or 8 b, and is finally deflected in a direction perpendicular to the incident direction. It enters the line irradiation head 9a or 9b, and is irradiated to the affected part that is shaped and positioned on the central axis.

  During braking, the drive device 5 is decelerated and stopped by the built-in brake, and the braking force is transmitted to the drive roller 4a. The braking force is transmitted from the driving roller 4a to the rotating ring 3 through the frictional force between the contact surfaces of the driving roller 4a and the rotating ring 3, and the rotation of the entire rotary irradiation treatment apparatus is stopped.

As described above, in the rotary irradiation treatment apparatus according to Embodiment 1 of the present invention, as shown in FIG. 3, the rotating ring 3 is composed of a plurality of arc-shaped members 3a and 3b, and the ends of the arc-shaped members 3a and 3b. The parts are joined by a general joining method such as welding or screw fastening.
In the first embodiment, the deflecting electromagnet 8a and the particle beam irradiation head 9a form a set to form one beam irradiation course A. Similarly, the deflection electromagnet 8b and the particle beam irradiation head 9b form a set to form another beam irradiation course B. That is, the rotary irradiation treatment apparatus according to the first embodiment has two beam irradiation courses, and the respective beam irradiation courses are fixed to the rotary frame 1 so as to be inclined at an angle of 90 ° about the central axis. Therefore, it becomes possible to irradiate the patient 14 taking a posture lying on the treatment table 11 from two directions whose irradiation angles are different by 90 °. Here, the deflection electromagnet 7 has a role of a distribution electromagnet that distributes the beam in either direction of the beam irradiation courses A and B.

  Next, the operation will be described. The driving force is transmitted from the driving device 5 by the frictional force between the contact surfaces of the driving roller 4a constituting the roller 4 and the rotating ring 3, and the entire rotating irradiation treatment apparatus rotates to the optimum angle for irradiation around the central axis. . The rotation range is, for example, 90 ° clockwise from the reference position (the highest part of the rotation ring 3, 0 ° position) in the state shown in FIG. 3, and this rotation range includes two rotation ranges that support the rotation ring 3. The roller 4 is in contact with the outer circumferential surface (not including the coupling portion 18) of the arc-shaped member 3b positioned between the two adjacent coupling portions 18, and the roller 4 contacts the outer circumferential surface of the other arc-shaped member 3a or the coupling portion 18. It can be set within a range where no contact occurs. Further, the crossing angle of the irradiation course of the two beams can be changed according to the rotation range. When the rotation range is 100 °, the crossing angle of the irradiation course can be set to 100 °. In a configuration where the irradiation range of one beam needs to be 90 °, the irradiation range can be given a tolerance by setting the irradiation range to be larger than 90 °. The crossing angle of the two beam irradiation courses can be set in the range of 90 ° to 270 °.

  The entire rotary irradiation treatment apparatus is rotated 90 ° clockwise in FIG. 3 so that the right half of the patient 14 (the right half of the paper in FIG. It is possible to irradiate the patient 14 with the particle beam from the region of 0 ° to 180 ° (180 ° is the lowermost part of the rotating ring 3) clockwise with 0 being 0 °. When it is necessary to irradiate a particle beam from the left half of the patient 14 (left half of FIG. 3, irradiation region 180 ° to 360 °), the treatment table 11 is moved around the y-axis of the three-dimensional coordinate axis shown in FIG. By rotating 180 °, the beam irradiation area can be changed from the right half to the left half. In addition, when the space which rotates the treatment table 11 in the irradiation room 13 cannot be ensured, the treatment table 11 is once taken out from the irradiation room 13 by guiding the beam 12 to the outside of the irradiation room 13, and outside the rotation irradiation treatment apparatus. It is also possible to change the orientation of the patient 14 (invert the head and feet while keeping the face up) by rotating the treatment table 11 180 ° horizontally and returning it to the irradiation chamber 13. With the operation described above, the patient 14 can be irradiated with the particle beam from all 360 ° directions around the z-axis (center axis).

  The rotary irradiation treatment apparatus according to the first embodiment has a configuration in which the roller 4 supports and drives the rotating ring 3 while abutting between adjacent coupling portions 18 of the rotating ring 3 (that is, the outer peripheral surface of the arc-shaped member 3a or 3b). Therefore, since the coupling portion 18 and the roller 4 do not come into contact with each other, vibration and noise do not occur, noise due to operation of the apparatus can be suppressed, and highly accurate treatment can be performed. is there. Therefore, it is not necessary to use a long delivery time and a high-priced one-piece structure rotating ring, and it is possible to shorten the production period and cost of the product.

  In the above description, the case where the 90 ° irradiation device rotates in the clockwise direction on the paper has been described by taking the reference position of the particle beam irradiation heads 9a and 9b shown in FIG. 3 as an example. Needless to say, it is possible to rotate counterclockwise after arranging the roller 4 to avoid contact with the apparatus during rotation. In addition, the directions of the two beam irradiation courses are orthogonal to each other, and all the beam irradiation areas can be in a range including 180 ° from directly above (the highest part) to immediately below (the lowest part) of the apparatus. By rotating the treatment table 11 by 180 ° in the horizontal direction with this arrangement, it is possible to irradiate the particle beam from all directions of 360 ° around the central axis without changing the posture of the patient 14 on the treatment table 11. Needless to say.

Embodiment 2. FIG.
In the first embodiment described above, when the patient 14 to be treated is lying on the treatment table 11 (or in a collapsed posture), the treatment table 11 is rotated by 180 ° around the y-axis so that the center axis is centered. It was stated that radiation treatment from all 360 ° directions was possible. In addition to rotating the treatment table 11 by 180 ° around the y-axis, an example will be described in which irradiation from all directions of 360 ° around the z-axis is possible using a rotary irradiation treatment apparatus having the same structure.

  In the first embodiment, the posture of the patient 14 on the treatment table 11 is only one posture, and has been described as only the supine (or the lying posture). In the second embodiment, the posture of the patient 14 is changed from the supine capable of irradiating the left half of the patient 14 with the beam, as shown in the side view of the main part in the xy plane of FIG. (The state in which the patient's orientation is not changed in the z-axis direction), and taking two postures enables beam irradiation from 360 ° around the z-axis. In the case of the second embodiment, a mechanism for rotating the treatment table 11 necessary for the first embodiment by 180 ° around the y-axis becomes unnecessary, and the structure of the treatment table 11 can be simplified.

Embodiment 3 FIG.
In the first embodiment, the beam irradiation course A in which the deflection electromagnet 8a and the particle beam irradiation head 9a are set as one set, and the beam irradiation course B in which the deflection electromagnet 8b and the particle beam irradiation head 9b are set as a set are: The case where the particle beam irradiation heads 9 a and 9 b are attached to the rotating frame 1 so as to cross each other at an angle of 90 ° has been described. In the first embodiment, as shown in FIG. 5, a beam irradiation course A, a deflection electromagnet 8b, and a particle beam irradiation head 9b (FIG. 5), which are a set of a deflection electromagnet 8a and a particle beam irradiation head 9a (not shown). A case will be described in which the beam irradiation course B (not shown) is arranged at a position facing each other across the central axis. At this time, at the reference position, the particle beam irradiation heads 9a and 9b are disposed on the rotating frame 1 so as to be at an angle of 90 ° and 270 ° on the rotating ring 3, respectively, and are opposed to each other on the x axis. ing.

  The rotating irradiation treatment apparatus shown in FIG. 5 is rotated 90 ° clockwise on the paper surface, and the upper left half of the patient 14 (upper left portion on the paper. 270 ° to 360 °) and lower right half (lower right portion on the paper. 90 ° to 180 °). °) is the irradiable area. As shown in the first embodiment, the treatment table 11 is rotated by 180 ° around the y axis without changing the posture of the patient 14 on the treatment table 11, thereby lowering the lower half of the patient 14 (the lower left portion). 180 ° to 270 °) and the upper right body (upper right portion, 0 ° to 90 °) can be irradiated, and as a result, irradiation with particle beams from all directions of 360 ° around the central axis becomes possible.

  As described above, when the beam irradiation courses A and B are opposed to each other, the particle beam irradiation heads 9a and 9b and the deflecting electromagnets 8a and 8b which are heavy bodies are arranged so as to face each other. The counter balance is not required. Accordingly, there is an effect that the weight of the entire rotary irradiation treatment apparatus is reduced.

  In the example of FIG. 5, the case where the device is rotated 90 ° clockwise on the paper surface has been described. However, the position of the coupling portion 18 of the rotating ring 3 is shifted by + 90 ° in the clockwise direction on the paper surface, and the coupling portion indicated by a broken line. By changing to the position 18b, the left lower body and the upper right body of the patient 14 are maintained while maintaining the contact state between the roller 4 and the coupling portion 18b even when the rotary irradiation treatment apparatus is rotated 90 ° counterclockwise on the paper surface. The particle beam irradiation range can be set, and by rotating the treatment table 11 by 180 ° in the y-axis direction, the remaining region can be irradiated with the particle beam, and the same effect as in the clockwise direction can be obtained.

Embodiment 4 FIG.
In the above first to third embodiments, the case where there are two beam irradiation courses in which the deflection electromagnet 8a (8b) and the particle beam irradiation head 9a (9b) are set as one set has been described, as shown in FIG. Are provided with four beam irradiation courses consisting of a combination of a deflection electromagnet (not shown) and particle beam irradiation heads 9a to 9d, and the adjacent beam irradiation courses cross over at an angle of 90 ° on the rotating frame 1. An example in which the particle beam irradiation heads 9a to 9d are arranged will be described. The rotating ring 3 is formed by connecting arc-shaped members 3a and 3b having a center angle of 180 ° at the connecting portion 18 as in the first to third embodiments. In the arrangement shown in FIG. 6, by rotating the entire rotary irradiation treatment apparatus 90 ° clockwise on the paper surface, irradiation is performed from all 360 ° around the central axis without changing the posture of the patient 14 in the irradiation chamber 13. This makes it possible to increase the convenience of the apparatus.

  In the above example, the entire device is rotated clockwise on the paper surface. However, as in the case of the third embodiment, the coupling portion 18a of the rotating ring 3 is indicated by a broken line 18a. By changing to the position, it is possible to rotate counterclockwise. The same effect can be obtained by arranging the coupling portion 18 so that the coupling portion 18 and the roller 4 do not come into contact with each other by the rotation of the rotating ring 3 and setting the rotation range to ± 45 ° from the reference position.

Embodiment 5 FIG.
In the above-described fourth embodiment, the entire rotary irradiation treatment apparatus having four beam irradiation courses using the rotating ring 3 formed by joining two arc-shaped members (semi-arc members) having a central angle of 180 °. A case has been described in which irradiation is possible from all directions of 360 ° around the central axis without changing the posture of the patient in the irradiation chamber 13 by rotating the lens 90 ° clockwise. In the fifth embodiment, as shown in FIG. 7, arc-shaped members (1/4 arc-shaped members) 3aa to 3dd having a central angle of 90 ° are used as the arc-shaped members constituting the rotating ring 3. The case where the rotating ring 3 is formed by combining four members will be described.

  At the reference position of the rotary irradiation treatment apparatus shown in FIG. 7, the coupling portion 18 of the rotary ring 3 is disposed on the rotary frame 1 so as to have angles of 0 °, 90 °, 180 °, and 270 °, respectively. Angle of irradiation course is 90 ° between adjacent irradiation heads so that the gate particle beam irradiation heads 9a to 9d have angles of 22.5 °, 112.5 °, 202.5 °, and 292.5 °. It is arranged to cross at. The rotation range is ± 22.5 ° from the reference position, and beam irradiation is possible in the range of 0 ° to 45 °, 90 ° to 135 °, 180 ° to 225 °, and 270 ° to 315 °. FIG. 7 shows that the particle beam irradiation head 9c (reference position) moves to a position indicated by reference numeral 9cc (broken line) when the apparatus is rotated by −22.5 °. By this rotation, the coupling portion 18 located at the lowermost portion of the rotating ring 3 at the reference position moves to a position indicated by reference numeral 18a (broken line). The rollers 4 are arranged so as to abut on the rotation rings 3 at angles of 150 ° and 210 °, respectively. Even in such a configuration, each roller 4 is in contact with the outer peripheral surface of the arc-shaped member 3bb or 3cc located between the adjacent coupling portions 18 and supports the rotating ring 3.

For the remaining irradiation range, particle beam irradiation is performed by rotating the treatment table 11 shown in the first embodiment by 180 ° about the y-axis and changing the direction of the patient's head and feet in the irradiation chamber 13. By performing the above, irradiation from all 360 ° directions around the central axis becomes possible.
Such arc-shaped members 3aa to 3dd, which are components of the rotating ring 3, have a shape that is a ¼ arc having a central angle of 90 °, and thus is half the size of the ½ arc. Therefore, the member can be obtained more easily than in the first to fourth embodiments.
Needless to say, the rotating ring 3 can also be formed by combining one half arc member and two quarter arc members.

Embodiment 6 FIG.
In the above-described first to fifth embodiments, the example in which particle beam irradiation is performed using a plurality of particle beam irradiation heads so as to configure a plurality of beam irradiation courses has been described, but in this sixth embodiment, A case where there is one beam irradiation course (one particle beam irradiation head) will be described.
FIG. 8 is a side view of an essential part on the xy plane showing the arrangement of the treatment table 11 on which the rotating ring 3, the particle beam irradiation head 9a, the roller 4, and the patient 14 are placed according to the present invention. As shown in the figure, the particle beam irradiation head 9a is mounted on the rotating frame 1 so as to be at an angle of 0 ° on the rotating ring 3 in the reference position, and the rotating ring 3 has a central angle of 90 °. An arc member (1/4 arc member; an example of an arc member having a center angle smaller than 180 °) 3e and an arc member (3/4 arc member having a center angle of 270 °). An example of an arcuate member having a central angle larger than 180 °.) It is formed by joining two members 3f. In the reference position, the coupling portions 18 of the rotating ring 3 are arranged at angles of 225 ° and 315 °, respectively.

  The rotation range of the particle beam irradiation head 9a is 180 ° or more clockwise in the drawing (in the direction of the arrow in the drawing). For example, by rotating 180 ° from the reference position (0 °, highest part), the rotating ring shown in FIG. 3, the particle beam irradiation head 9 a moves to a position corresponding to the lowermost part, and particle beam irradiation to the right half of the patient 14 becomes possible (the particle beam irradiation head 9 aa after 180 ° rotation and the coupling unit 18 a (Indicated by a broken line.) As for the remaining irradiation areas, as shown in the first embodiment, the treatment table 11 is rotated by 180 ° around the y axis to reverse the direction of the patient in the z axis direction, and the moving range of the particle beam irradiation head 9a. It is possible to perform beam irradiation from all 360 ° directions around the central axis without changing the angle.

  With such a configuration, the rotary irradiation treatment apparatus according to the sixth embodiment can have only one beam irradiation course composed of a combination of a deflecting electromagnet (not shown) and a particle beam irradiation head 9a. It is possible to reduce the cost compared to the case where the gate beam device is provided. Further, the rotating ring 3 can be formed by connecting a plurality of arc-shaped members (3e, 3f), and there is an effect that the cost can be reduced and the delivery time can be shortened.

  In the above-described example, the arc-shaped members 3e and 3f having the center angles of 90 ° and 270 ° are described. However, the coupling portion 18 and the roller 4 may be configured to be arc-shaped members having the center angles of 120 ° and 240 °. In the range in which the movement range of the particle beam irradiation head 9a (the irradiation region of the beam irradiation course, 180 ° or more, including the uppermost portion and the lowermost portion on the rotating ring 3) can be secured without interference. Needless to say, the central angle of the member can be set. In the rotary frame 1, a counter balance 2 is disposed in an arrangement facing the deflecting electromagnet and the particle beam irradiation head 9a, which are heavy bodies, in order to balance the weight. In FIG. Is omitted.

Embodiment 7 FIG.
In the above-described sixth embodiment, the rotating ring 3 is formed by the arc-shaped members 3e and 3f having the center angles of 90 ° and 270 °, the beam irradiation course is one, and the particle beam irradiation head 9a (the reference position is the rotating ring). 3 illustrates the case where the irradiation region by the uppermost portion on 3 is 0 ° to 180 °. In the rotary irradiation treatment apparatus of the seventh embodiment, as shown in FIG. 9, one beam irradiation course is added to the configuration of the sixth embodiment, and the position of the angle 180 ° from the reference position (particle beam irradiation head 9a). The particle beam irradiation head 9b is mounted on the rotary frame 1 which is a position opposite to the rotation frame 1, and the particle beam irradiation head 9b performs particle beam irradiation in a range of 180 ° to 360 °. Thus, by providing two beam devices, it is possible to perform particle beam irradiation from all directions of 360 ° around the central axis without the need to move the treatment table 11 or change the posture of the patient 14. can do.

It is a principal part cross-section side view in yz plane of the rotary irradiation treatment apparatus by Embodiment 1 of this invention. It is the bird's-eye view which showed the principal part of the rotary irradiation treatment apparatus by Embodiment 1 of this invention. It is a principal part side view in the xy plane of the rotary irradiation treatment apparatus by Embodiment 1 of this invention. It is a principal part side view in the xy plane of the rotary irradiation treatment apparatus by Embodiment 2 of this invention. It is a principal part side view in the xy plane of the rotary irradiation treatment apparatus by Embodiment 3 of this invention. It is a principal part side view in the xy plane of the rotary irradiation therapy apparatus by Embodiment 4 of this invention. It is a principal part side view in the xy plane of the rotary irradiation therapy apparatus by Embodiment 5 of this invention. It is a principal part side view in the xy plane of the rotary irradiation therapy apparatus by Embodiment 6 of this invention. It is a principal part side view in the xy plane of the rotary irradiation treatment apparatus by Embodiment 7 of this invention.

Explanation of symbols

1 rotating frame 2a, 2b counter balance,
3 rotating ring,
3a, 3b, 3aa, 3bb, 3cc, 3dd, 3e, 3f arc-shaped member,
4 Roller 4a Drive roller,
4b Support roller 5 Drive device,
6, 6a, 6b Vacuum duct 7, 8a, 8b Bending electromagnet,
9a, 9b, 9c, 9d, 9aa Particle beam irradiation head,
10 cone frame 11 treatment table,
12 Beam 13 Irradiation room,
14 Patient 18, 18a Joint.

Claims (9)

A rotating ring formed by connecting a plurality of arc-shaped members and arranged to be rotatable around a central axis, a roller for supporting and driving the rotating ring by contacting between adjacent connecting portions of the rotating ring, A particle beam irradiation head that is attached to a rotating ring via a frame and irradiates a particle beam toward the central axis, the particle beam irradiation head includes a first irradiation head and a second irradiation head, and The irradiation course of the second particle beam emitted from the second irradiation head is at an arbitrary angle around the central axis with respect to the irradiation course of the first particle beam emitted from the first irradiation head. A rotary irradiation treatment apparatus , wherein the first irradiation head and the second irradiation head are attached to the frame so as to cross each other . The first, wherein the irradiation course of the second particle beam, to intersect at an angle of 90 degrees to 270 degrees from each other, that the first, second irradiation head is characterized in that attached to the frame Item 2. The rotary irradiation treatment apparatus according to Item 1 .   The rotary irradiation treatment apparatus according to claim 1, wherein the first irradiation head and the second irradiation head are attached to the frame so as to face each other.   The rotary irradiation treatment apparatus according to claim 1, wherein the rotating ring is formed by connecting two arc-shaped members having a central angle of 180 degrees.   The rotating ring is formed by connecting four arc-shaped members having a central angle of 90 degrees, and the particle beam irradiation head is attached to the frame every 90 degrees with the central axis as a center. The rotary irradiation treatment apparatus according to claim 1, wherein:   The arc-shaped member is composed of a first arc-shaped member having a center angle larger than 180 degrees and a second arc-shaped member having the same diameter as the first arc-shaped member and a center angle smaller than 180 degrees, The rotary irradiation treatment apparatus according to claim 1, wherein the rotating ring is formed by connecting the first and second arcuate members. The rotation irradiation treatment apparatus according to claim 6 , wherein a rotation angle of the particle beam irradiation head is 180 degrees or more. Said central shaft is arranged horizontally, the rotation angle of the particle beam irradiation head, according to claim, characterized in that it is adjusted to include a range from the top of the bottom of the rotary ring 1 or claim 7 The rotational irradiation treatment apparatus as described. 2. An irradiation chamber provided along the central axis, and a treatment bed introduced into the irradiation chamber, wherein the treatment bed is configured to be rotatable 180 degrees in a horizontal direction. Or the rotation irradiation treatment apparatus of Claim 8 .

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