TREATMENT OF PATIENT TUMORS BY CHARGED PARTICLE THERAPY

• US 20090296885A1
• Filed: 05/28/2008
• Published: 12/03/2009
• Est. Priority Date: 05/28/2008
• Status: Active Grant

• Current Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Original Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Inventors: Clayton, James, Marc, Marcel R., Boeh, Lester D., Langenegger, Armin
• Granted Patent: US 7,834,336 B2
• Time in Patent Office: Days
• US Class Current: 378/65
• CPC Class Codes: A61N 2005/1087 Ions; Protons
• CPC Class Codes: A61N 5/1042 with spatial modulation of the radiation beam within the treatment head
• CPC Class Codes: A61N 5/1047 with movement of the radiation head during application of radiation, e.g. for intensity modulated arc therapy or IMAT
• CPC Class Codes: A61N 5/1081 Rotating beam systems with a specific mechanical construction, e.g. gantries

Abstract

A method of irradiating a target in a subject using charged particle therapy includes the steps of positioning a subject on a supporting device, positioning a delivery device adapted to deliver charged particles, and delivering charged particles to a target in the subject wherein the delivery device rotates around the target during delivery of at least a portion of the charged particles.

Claims

1. A method of irradiating a target in a subject, comprising the steps of:

positioning a subject on a supporting device;

positioning a delivery device adapted to deliver charged particles; and

delivering charged particles to a target in the subject, wherein the delivery device rotates about the target during delivery of at least a portion of the charged particles.

2. The method of claim 1 wherein one or more parameters of the charged particles are modulated during the rotation of the delivery device, said parameters including the energy, the intensity, the beam direction and the beam shape of the charged particles.

3. The method of claim 1 wherein two or more parameters including the energy, the intensity, the beam direction and the beam shape of the charged particles are concurrently modulated during the rotation of the delivery device.

4. The method of claim 1 wherein all or substantially all of charged particles for a treatment fraction are delivered to the target during a single rotation of the delivery device in about 360 degrees or less.

5. The method of claim 1 wherein in the delivering step a multi-leaf collimator is used to shape and modulate the energy of the charged particles concurrently.

6. The method of claim 1 wherein said delivery device is mounted to a gantry capable of rotating in 360 degrees or more.

7. The method of claim 1 wherein in the delivering step the supporting device is concurrently moved.

8. The method of claim 1 wherein the charged particles are protons.

9. A method of irradiating a target in a subject, comprising the steps of:

positioning a subject on a supporting device;

positioning a delivery device adapted to deliver charged particles; and

delivering charged particles to a target in the subject, wherein the energy of the charged particles is modulated such that the Bragg peaks of the charged particles are deposited approximately on the distal periphery of the target, and the delivery device rotates about the target during delivery of at least a portion of the charged particles.

10. The method of claim 9 wherein in the delivering step the delivery device is stationary during delivery of at least a portion of the charged particles.

11. The method of claim 9 wherein the charged particles are in the form of a pencil beam.

12. The method of claim 9 wherein the charged particles are protons.

13. The method of claim 9 wherein in the delivering step the energy and the intensity of the charged particles are concurrently modulated.

14. The method of claim 9 wherein in the delivering step all or substantially all charged particles for a treatment fraction are delivered to the target during a single rotation of the delivery device in about 360 degrees or less.

15. The method of claim 9 wherein in the delivering step the supporting device is concurrently moved.

16. A charged particle therapy system comprising:

a particle accelerator;

a particle delivery device; and

a beam path for transporting charged particles generated by the particle accelerator to the delivery device;

wherein said delivery device is configured to rotate around a target while delivering at least a portion of charged particles to the target in operation.

17. The system of claim 16 wherein the delivery device is coupled to a gantry rotatable in 360 degrees or more.

18. The system of claim 16 wherein the delivery device comprises a multi-leaf collimator.

19. The system of claim 18 wherein said multi-leaf collimator is configured to shape and modulate the energy of the particles concurrently.

20. The system of claim 18 wherein said multi-leaf collimator is configured to shape and scatter the charged particles concurrently.

21. The system of claim 18 wherein said multi-leaf collimator is a 3-dimensional multi-leaf collimator.

22. A method of irradiating a target in a subject, comprising the steps of:

positioning a subject on a supporting device;

positioning a delivery device adapted to deliver charged particles; and

delivering charged particles for a treatment fraction to a target in the subject using the delivery device with more than one rotations, wherein in a first rotation, the Bragg peaks of substantially all charged particles are deposited approximately on the distal periphery of the target, and in a second rotation, the Bragg peaks of substantially all charged particles are deposited approximately in the interior of the target.

23. The method of claim 22 wherein at least a portion of the charged particles are delivered to the target during the rotations of the delivery device.

24. The method of claim 22 wherein one or more parameters of the charged particles are modulated during the rotations of the delivery device, said parameters including the energy, the intensity, the beam direction and the beam shape of the charged particles.

25. The method of claim 22 wherein two or more parameters including the energy, the intensity, the beam direction and the beam shape of the charged particles are concurrently modulated during the rotations of the delivery device.

26. The method of claim 22 wherein said first or second rotation is a complete rotation in about 360 degrees or a partial rotation less than 360 degrees.

27. The method of claim 22 wherein the charged particles are delivered to the target at selected angles of rotations.