Method for operating a particle therapy system

• US 8,637,839 B2
• Filed: 04/06/2011
• Issued: 01/28/2014
• Est. Priority Date: 04/07/2010
• Status: Active Grant

• Current Assignee: Varian Medical Systems Particle Therapy GmbH & Company KG (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Bruer, Martin
• Primary Examiner(s): Johnston, Phillip A
• Application Number:
  US13/081,433
• Publication Number:
  US 20120119114A1
• Time in Patent Office: 1,028 Days
• Field of Search: 250/492.3
• US Class Current: 250/492.3
• CPC Class Codes: A61N 2005/1087 Ions; Protons
• CPC Class Codes: A61N 5/10 X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy A61N5/01 takes precedence
• CPC Class Codes: A61N 5/1043 Scanning the radiation beam, e.g. spot scanning or raster scanning

Abstract

The present embodiments relate to a method for operating a particle therapy system. The particle therapy system includes a particle generation device, a beam generating device for generating a particle beam from at least one portion of the generated irradiation particles, a measuring device for automatically measuring a particle beam intensity of the particle beam, and a particle beam influencing device. The particle beam influencing device is configured to adjust the particle beam intensity as a function of the measured particle beam intensity and a predefined setpoint value for the particle beam intensity.

Claims

1. A method for operating a particle therapy system, the method comprising:

generating and accelerating irradiation particles;

generating a particle beam from at least a portion of the generated irradiation particles;

automatically measuring a particle beam intensity of the particle beam;

automatically sequentially irradiating a plurality of scanning points with the particle beam in accordance with a predefined irradiation plan, wherein the irradiation plan assigns an irradiation dose to each scanning point of the plurality of scanning points, and wherein a set-point value for the particle beam intensity is assigned to each scanning point of the plurality of scanning points based on the irradiation dose assigned to the scanning point by the predefined irradiation plan; and

automatically influencing the particle beam intensity as a function of the measured particle beam intensity and the setpoint value of the scanning point that is to be irradiated.

2. The method as claimed in claim 1, further comprising directing the particle beam to a particle beam output of a treatment station,

wherein the particle beam intensity is measured at the particle beam output.

3. The method as claimed in claim 1, wherein generating the particle beam comprises decoupling a fraction of the generated irradiation particles with the aid of a knock-out exciter, influencing the particle beam intensity with a radio frequency power of the knock-out exciter being set automatically.

4. The method as claimed in claim 1, wherein the setpoint value of the particle beam intensity has a non-constant variation over time.

5. The method as claimed in claim 1, wherein a proportional regulating function, an integrating regulating function, or a differentiating regulating function is used to influence the particle beam intensity.

6. The method as claimed in claim 1, wherein generating and accelerating the irradiation particles comprises using a linear accelerator and a synchrotron or a cyclotron.

7. The method as claimed in claim 1, further comprising directing the particle beam to one treatment station of a plurality of treatment stations, the particle beam intensity being measured at each treatment station of the plurality of treatment stations,

wherein the measured particle beam intensity of the one treatment station is automatically used for influencing the particle beam intensity.

8. The method as claimed in claim 1, further comprising determining information relating to quality of a particle generation device that generates and accelerates the irradiation particles,

wherein the information is determined automatically as a function of the measured particle beam intensity and the setting of the fraction of the decoupled irradiation particles.

20. The method as claimed in claim 3, wherein the setpoint value of the particle beam intensity has a non-constant variation over time.

9. A particle therapy system comprising:

a particle generation device operable to generate and accelerate irradiation particles;

a beam generating device operable to generate a particle beam from at least a portion of the generated irradiation particles;

a measuring device operable to automatically measure a particle beam intensity of the particle beam;

a raster scan controller configured to sequentially irradiate scanning points with the particle beam in accordance with a predefined irradiation plan, wherein the irradiation plan assigns an irradiation dose to each of the scanning points, and wherein a set-point value for the particle beam intensity is assigned to each of the scanning points based on the irradiation dose assigned to the scanning point by the predefined irradiation plan; and

a particle beam influencing device that is coupled to the raster scan controller and is configured to alter the particle beam intensity as a function of the measured particle beam intensity and the assigned setpoint value for the particle beam intensity of the scanning point that is to be irradiated.

10. The particle therapy system as claimed in claim 9, further comprising a particle beam feeder unit operable to direct the particle beam to a particle beam output of a treatment station,

wherein the measuring device is disposed at the particle beam output.

11. The particle therapy system as claimed in claim 9, wherein the beam generating device comprises a knock-out exciter having a control input operable to adjust a radio frequency power, the knock-out exciter being operable to vary a decoupled fraction of the irradiation particles, and

wherein the particle beam influencing device sets the control input of the knock-out exciter as a function of the measured particle beam intensity and the predefined setpoint value for the particle beam intensity in order to alter the particle beam intensity.

12. The particle therapy system as claimed in claim 9, wherein the setpoint value for the particle beam intensity has a non-constant variation over time.

13. The particle therapy system as claimed in claim 9, wherein the particle beam influencing device comprises a proportional controller, an integrating controller, or a differentiating controller.

14. The particle therapy system as claimed in claim 9, wherein the particle generation device comprises a linear accelerator and a synchrotron or a cyclotron.

15. The particle therapy system as claimed in claim 9, further comprising:

a particle beam feeder unit operable to direct the particle beam to one treatment station of a plurality of treatment stations, wherein a measuring device operable to automatically measure the particle beam intensity of the output particle beam is provided at each treatment station of the plurality of treatment stations; and

a switchover unit configured to direct the measured particle beam intensity of the one treatment room to the particle beam influencing device.

16. The particle therapy system as claimed in claim 9, further comprising a quality determining device operable to determine information relating to quality of the particle generation device as a function of the measured particle beam intensity and the influencing of the particle beam intensity.

17. The particle therapy system as claimed in claim 9, wherein the particle therapy system is configured for:

generating and accelerating the irradiation particles;

generating the particle beam from at least the portion of the generated irradiation particles;

automatically measuring the particle beam intensity of the particle beam;

automatically sequentially irradiating the scanning points with the particle beam in accordance with the predefined irradiation plan; and

automatically influencing the particle beam intensity as a function of the measured particle beam intensity and the setpoint value of the scanning point that is to be irradiated.

18. A non-transitory computer readable medium comprising a computer program product that, when executed by a particle beam influencing device of a particle therapy system, causes the particle beam influencing device to perform a method for operating the particle therapy system, the method comprising:

generating and accelerating irradiation particles;

generating a particle beam from at least a portion of the generated irradiation particles;

automatically measuring a particle beam intensity of the particle beam;

automatically sequentially irradiating a plurality of scanning points with the particle beam in accordance with a predefined irradiation plan, wherein the irradiation plan assigns an irradiation dose to each scanning point of the plurality of scanning points, and wherein a set-point value for the particle beam intensity is assigned to each scanning point of the plurality of scanning points based on the irradiation dose assigned to the scanning point by the predefined irradiation plan; and

automatically influencing the particle beam intensity as a function of the measured particle beam intensity and the setpoint value of the scanning point that is to be irradiated.

19. A non-transitory electronically readable data medium on which is stored electronically readable control information that is configured such that the electronically readable control information performs a method for operating a particle therapy system when the electronically readable data medium is used in a particle beam influencing device, the method comprising:

generating and accelerating irradiation particles;

generating a particle beam from at least a portion of the generated irradiation particles;

automatically measuring a particle beam intensity of the particle beam;

automatically sequentially irradiating a plurality of scanning points with the particle beam in accordance with a predefined irradiation plan, wherein the irradiation plan assigns an irradiation dose to each scanning point of the plurality of scanning points, and wherein a set-point value for the particle beam intensity is assigned to each scanning point of the plurality of scanning points based on the irradiation dose assigned to the scanning point by the predefined irradiation plan; and

automatically influencing the particle beam intensity as a function of the measured particle beam intensity and the setpoint value of the scanning point that is to be irradiated.