Irradiation device and method

Patent metadata

Field	Value
Publication number	US-10179252-B2
Application number	US-201414909780-A
Country	US
Kind code	B2
Filing date	Dec 15, 2014
Priority date	Dec 17, 2013
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

Irradiation device for irradiating an irradiation object with heavy charged particles, comprising a support for the irradiation object, and an irradiation nozzle irradiating a charged particle beam towards the irradiation object, wherein the beam is deflected within the irradiation nozzle. The support for the irradiation object is moveable at least horizontally, and the irradiation nozzle is moveable at least vertically and rotatable around a nozzle swivel axis along which the particle beam enters into the irradiation nozzle.

First claim

The invention claimed is:

1. An irradiation device for irradiating an irradiation object with heavy charged particles, comprising:
a support for the irradiation object; and
an irradiation nozzle irradiating a charged particle beam towards the irradiation object,
wherein the particle beam is deflected within the irradiation nozzle,
wherein the support for the irradiation object is moveable at least horizontally, and
wherein the irradiation nozzle is moveable at least vertically and is independently rotatable around a nozzle swivel axis along which the particle beam enters into the irradiation nozzle.

2. The irradiation device according to claim 1 , wherein the nozzle swivel axis is horizontal.

3. The irradiation device according to claim 2 , wherein the vertical and the rotary movements of the irradiation nozzle are coordinated by a control device controlling position and direction of the particle beam irradiated from the irradiation nozzle.

4. The irradiation device according to claim 2 , wherein at least two of the three movements
(iv) horizontal movement of the support
(v) vertical movement of the irradiation nozzle
(vi) rotary movement of the irradiation nozzle

are coordinated by a control device in such a way that the particle beam keeps impinging onto the irradiation object when the support and/or the irradiation nozzle is moved.

5. The irradiation device according to claim 1 , wherein the vertical and the rotary movements of the irradiation nozzle are coordinated by a control device controlling position and direction of the particle beam irradiated from the irradiation nozzle.

6. The irradiation device according to claim 1 , wherein at least two of the three movements
(i) horizontal movement of the support
(ii) vertical movement of the irradiation nozzle
(iii) rotary movement of the irradiation nozzle

are coordinated by a control device in such a way that the particle beam keeps impinging onto the irradiation object when the support and/or the irradiation nozzle is moved.

7. The irradiation device according to claim 1 , wherein the horizontal movement of the support and the vertical and rotary movements of the irradiation nozzle are coordinated by a control device in such a way that the particle beam impinges onto the irradiation object at a defined distance from the irradiation nozzle when the support and/or the irradiation nozzle is moved.

8. The irradiation device according to claim 1 , wherein an angle between a direction of the particle beam impinging onto the irradiation object and the vertical direction can be varied between 0° and +180°.

9. The irradiation device according to claim 1 , wherein the support for the irradiation object is rotatable around a vertical axis by 180°.

10. The irradiation device according to claim 1 , further comprising:
a pivotable cantilever arm for effecting the vertical movement of the irradiation nozzle, the cantilever arm being pivotable around a cantilever arm swivel axis and comprising a beam guidance device guiding the particle beam to the irradiation nozzle forming an end portion of the cantilever arm,
wherein the particle beam enters into the cantilever arm along the cantilever arm swivel axis,
wherein the cantilever arm comprises a first beam deflector deflecting the entering particle beam away from the cantilever arm swivel axis by 90°, and
wherein the cantilever arm comprises, downstream from the first deflector, a second deflector deflecting the particle beam into the irradiation nozzle.

11. The irradiation device according to claim 10 , wherein the cantilever arm swivel axis and/or the nozzle swivel axis is horizontal and/or the first deflector and/or the second deflector deflect the particle beam by 90°.

12. The irradiation device according to claim 1 , further comprising a telescope arm for effecting vertical movement of the irradiation nozzle,
the telescope arm comprising a beam guidance device for guiding the particle beam to the irradiation nozzle forming an end portion of the telescope arm,
wherein the telescope arm comprises a telescope section of variable length (L) and, at a downstream end of the telescope section, a deflector deflecting the particle beam into the irradiation nozzle,
wherein the irradiation nozzle is moved vertically by variation of the length (L) of the telescope section.

13. The irradiation device according to claim 12 , wherein the nozzle swivel axis is horizontal and/or the particle beam enters into the telescope arm in horizontal direction and is deflected into the telescope section.

14. The irradiation device according to claim 12 , wherein the nozzle swivel axis is horizontal and/or the particle beam enters into the telescope arm in horizontal direction and is deflected into the telescope section, which is vertical.

15. The irradiation device according to claim 1 , wherein the vertical movement of the irradiation nozzle is effected by arranging a particle beam source, a beam guidance device guiding the particle beam into the irradiation nozzle, and the irradiation nozzle on a platform, the platform being at least movable vertically.

16. The irradiation device according to claim 1 , further comprising, upstream from the irradiation nozzle, a particle beam deflector allowing to deflect the particle beam to variable inclinations compared to a horizontal plane in such a way that the particle beam can enter into the irradiation nozzle at various vertical elevations.

17. The irradiation device according to claim 1 , wherein the horizontal movement of the support and the vertical and rotary movements of the irradiation nozzle are coordinated by a control device in such a way that the particle beam impinges onto the irradiation object at a defined, constant distance from the irradiation nozzle when the support and/or the irradiation nozzle is moved.

18. The irradiation device according to claim 1 , wherein an angle between a direction of the particle beam impinging onto the irradiation object and the vertical direction is configured to be varied between −180° and +180°.

19. The irradiation device according to claim 1 , wherein an angle between a direction of the particle beam impinging onto the irradiation object and the vertical direction can be continuously varied between 0° and +180°.

20. The irradiation device of claim 1 , wherein the particle beam is deflected within the irradiation nozzle by 90°.

21. A method for irradiating an irradiation object with heavy charged particles from various angular directions, comprising:
placing the irradiation object onto a support, which is moveable at least horizontally;
irradiating a charged particle beam from an irradiation nozzle along a certain irradiation direction towards the irradiation object;
deflecting the particle beam within the irradiation nozzle; and
changing the irradiation direction by moving the support at least horizontally and by moving the irradiation nozzle at least vertically and rotating the irradiation nozzle around a swivel axis, along which the particle beam enters the irradiation nozzle,
wherein the irradiation nozzle is configured to be independently rotatable around the swivel axis.

22. The method according to claim 21 , wherein a distance from the irradiation nozzle to the irradiation object is maintained constant while the irradiation direction is changed by moving and/or rotating the irradiation nozzle and/or moving the support.

23. The method according to claim 21 ,

Assignees

• Varian Medical Systems Particle Therapy Gmbh

Inventors

• Timmer Jan
• Schultheiss Juergen
• Cruz L Alberto
• Schillo Michael

Classifications

• H05H2277/11

  Radiotherapy · CPC title

• A61N2005/1087

  Ions; Protons · CPC title

• A61N5/107

  in real time, i.e. during treatment · CPC title

• A61N5/1067

  in real time, i.e. during treatment · CPC title

• H05H7/001

  Arrangements for beam delivery or irradiation (irradiation systems per se G21K5/00) · CPC title