Method and apparatus pertaining to treating a patient using heavy particles

Patent metadata

Field	Value
Publication number	US-10143856-B2
Application number	US-201615086417-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	Mar 31, 2016
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A heavy-particle treatment system exposes a patient's treatment volume, during the course of a single treatment session, to beams of heavy particles from a variety of different angles. The source of heavy particles may rotate about the patient to facilitate that variety of different angles. The foregoing can occur pursuant to a treatment plan that accounts for a penetration range as corresponds to the beams of heavy particles and for using at least one lateral beam controlling device to control at least one of the beams of heavy particles.

First claim

We claim:

1. A method comprising:
providing a source of heavy particles that comprise at least one of antiprotons and pions, wherein the source of heavy particles is movably mounted to a gantry that forms an arcuately-shaped pathway about a patient such that the source of heavy particles can be selectively rotated about at least a part of the patient;
exposing a treatment volume within the patient, during a course of a single treatment session, to beams of the heavy particles as sourced by the source of heavy particles from a variety of different angles as the source of heavy particles rotates about at least a part of the patient.

2. The method of claim 1 further comprising:
providing a treatment plan;

wherein exposing the treatment volume to beams of the heavy particles comprises using the treatment plan to govern exposing the treatment volume to the beams of the heavy particles.

3. The method of claim 2 wherein the treatment plan comprises, at least in part, accounting for a penetration range as corresponds to the beams of the heavy particles.

4. The method of claim 3 wherein accounting for a penetration range as corresponds to the beams of the heavy particles comprises, at least in part, accounting for a corresponding anticipated spread-out Bragg peak (SOBP) characteristic.

5. The method of claim 2 wherein the treatment plan provides for using at least one lateral beam controlling device to control at least one of the beams of heavy particles.

6. The method of claim 5 wherein the at least one lateral beam controlling device comprises at least one of:
at least one steering magnet; and
at least one multi-leaf collimator.

7. The method of claim 2 wherein the treatment plan provides for using at least one dynamic proton range adjuster to control a penetration range of at least one of the beams of heavy particles.

8. The method of claim 7 wherein the dynamic proton range adjuster comprises at least one of:
an energy selector;
a dynamically adjustable material thickness;
a range modulator wheel.

9. The method of claim 2 wherein the treatment plan comprises, at least in part:
while rotating the source of heavy particles about the patient, selectively varying an overall intensity level of the heavy particles as a function of a corresponding angle by at least one of:
using a lateral beam controller to laterally confine the beams as a function of the corresponding angle; and
adjusting a heavy-particle range as a function of the corresponding angle.

10. The method of claim 9 wherein the treatment plan provides for making at least some changes during the treatment session to the overall intensity level of the heavy particles within a sub-millisecond time scale.

11. An apparatus comprising:
a source of heavy particles that comprise at least one of antiprotons and pions, wherein the source of heavy particles is movably mounted to a gantry that forms an arcuately-shaped pathway about a patient such that the source of heavy particles can be selectively rotated about at least a part of the patient;
a control circuit operably coupled to the source of heavy particles and configured to expose a treatment volume within the patient, during a course of a single treatment session, to beams of the heavy particles as sourced by the source of heavy particles from a variety of different angles as the source of heavy particles rotates about at least a part of the patient.

12. The apparatus of claim 11 wherein in the control circuit is configured to use a treatment plan to govern exposing the treatment volume to the beams of the heavy particles.

13. The apparatus of claim 12 wherein the treatment plan comprises, at least in part, accounting for a penetration range as corresponds to the beams of the heavy particles.

14. The apparatus of claim 12 wherein the treatment plan provides for using at least one lateral beam controlling device to control at least one of the beams of heavy particles.

15. The apparatus of claim 14 wherein the at least one lateral beam controlling device comprises at least one multi-leaf collimator.

16. The apparatus of claim 12 wherein the treatment plan provides for using at least one dynamic proton range adjuster to control a penetration range of at least one of the beams of heavy particles.

17. The apparatus of claim 16 wherein the dynamic proton range adjuster comprises at least one of:
an energy selector;
a dynamically adjustable material thickness;
a range modulator wheel.

Assignees

• Varian Medical Systems Int Ag

Inventors

• Siljamäki Sami P
• Nord Janne I

Classifications

• A61N2005/1074

  Details of the control system, e.g. user interfaces · CPC title

• A61N5/1048 Primary

  Monitoring, verifying, controlling systems and methods · CPC title

• A61N2005/1087

  Ions; Protons · CPC title

• A61N5/1081

  Rotating beam systems with a specific mechanical construction, e.g. gantries · CPC title

• A61N5/1043 Primary

  Scanning the radiation beam, e.g. spot scanning or raster scanning · CPC title