Particle beam irradiation system and particle beam irradiation facility

1. A particle beam irradiation system, comprising:

an accelerator which is installed on a floor surface and accelerates a charged particle beam;

a transport device which transports the charged particle beam emitted from the accelerator;

an irradiation device which irradiates an irradiation target with the charged particle beam transported by the transport device; and

a gantry which is installed on the floor surface, separately from the accelerator, and to which the irradiation device is attached,

wherein the gantry includes:

a rotating body which rotates the irradiation device about the irradiation target, and

a support device which supports the rotating body from the floor surface at a position where a projection plane of the rotating body on the floor surface and a projection plane of the accelerator or the transport device on the floor surface at least partially overlap with each other,

wherein the transport device includes a first beam transport unit which transports the charged particle beam accelerated by the accelerator along the floor surface and a second beam transport unit which transports the charged particle beam upward on a downstream side of the first beam transport unit, and

wherein the support device has the second beam transport unit behind and is grounded on the floor surface across the first beam transport unit by two legs.

2. The particle beam irradiation system according to claim 1 ,

wherein the accelerator and the gantry are arranged in one space partitioned as a room.

3. The particle beam irradiation system according to claim 2 ,

wherein the support device is in contact with the floor surface on a first grounding surface and a second grounding surface, at least a part of at least one of the accelerator or the transport device is disposed between the first grounding surface and the second grounding surface.

4. The particle beam irradiation system according to claim 1 ,

wherein the transport device includes a first bending magnet which deflects the charged particle beam accelerated by the accelerator upward and a second bending magnet which deflects the charged particle beam deflected by the first bending magnet in a direction of a rotation axis of the rotating body.

5. The particle beam irradiation system according to claim 1 ,

wherein the gantry further includes a third bending magnet which deflects the charged particle beam on an outside of an outer peripheral surface of the rotating body, and

wherein the support device includes a first support unit which is disposed in front of the third bending magnet in a rotation axis direction of the rotating body and a second support unit which is disposed behind the third bending magnet.

6. The particle beam irradiation system according to claim 1 ,

wherein the gantry further includes a transport line which transports the charged particle beam to an outer peripheral surface of the rotating body, and

wherein a height of the support device is larger than a sum of a height of the transport line from the outer peripheral surface of the rotating body and a height of the accelerator or the transport device below the rotating body from the floor surface.

7. The particle beam irradiation system according to claim 1 ,

wherein a part of the transport device is fixed to a wall surface of a room in which the particle beam irradiation system is installed.

8. The particle beam irradiation system according to claim 1 ,

wherein the gantry further includes a transport line which transports the charged particle beam transported by the transport device to an outside of an outer peripheral surface of the rotating body, transports the charged particle beam in a circumferential direction of the rotating body, and transports the charged particle beam in a direction directed to a rotation axis of the rotating body.

9. The particle beam irradiation system according to claim 1 ,

wherein the accelerator is a synchrotron that accelerates the charged particle beam on an annual path.

10. The particle beam irradiation system according to claim 9 ,

wherein the support device incudes a first leg and a second leg as the two legs, and is grounded on the floor surface across the annual path such that the first leg is positioned on an inside of the annual path and the second leg is positioned on an outside of the annual path.

11. The particle beam irradiation system according to claim 1 ,

wherein at least a part of a material of the support device is metal.

12. The particle beam irradiation system according to claim 1 ,

wherein at least a part of a material of the support device is concrete.

13. A particle beam irradiation facility, comprising:

a building; and

the particle beam irradiation system according to claim 1 installed in the building.

14. The particle beam irradiation facility according to claim 13 ,

wherein the irradiation target is a patient, and

wherein the particle beam irradiation facility further includes a treatment room in which a treatment stand on which the patient is placed and which is able to enter an inside of the rotating body is installed and a partition wall provided between the accelerator and a room where the gantry is installed.