Apparatus and method pertaining to dynamic use of a radiation therapy collimator

• US 7,894,574 B1
• Filed: 09/22/2009
• Issued: 02/22/2011
• Est. Priority Date: 09/22/2009
• Status: Active Grant

• Current Assignee: Siemens Healthineers International AG
• Original Assignee: Varian Medical Systems International AG (Siemens AG)
• Inventors: Peltola, Jarkko, Nord, Janne
• Primary Examiner(s): Kiknadze; Irakli
• Application Number:
  US12/564,544
• Time in Patent Office: 518 Days
• Field of Search: 378/4, 378/19, 378/62, 378/64, 378/65, 378147-155
• US Class Current: 378/65
• CPC Class Codes: A61N 5/1036 Leaf sequencing algorithms
• CPC Class Codes: A61N 5/1042 with spatial modulation of the radiation beam within the treatment head

Abstract

A radiation-therapy treatment-facilitation platform (200) provides (101) treatment-plan information regarding a plurality of different angles of exposure to employ when administering radiation therapy to a given target volume (203). This treatment-plan information is then used (103) to determine corresponding, and differing, aperture configuration for a second collimator (207) that is disposed between a source (201) for the radiation-therapy beam (202) and a multileaf collimator (206). By one approach, this second collimator is dynamically used when administering the radiation therapy for at least some of the differing angles of exposure. These teachings will optionally accommodate also providing (102) form information regarding the target volume that is used, along with the aforementioned treatment-plan information, to determine the aperture settings for the second collimator.

Claims

1. A method for use in administering radiation therapy to a target volume of a patient using a radiation-therapy beam and differing angles of exposure in conjunction with a multileaf collimator, comprising:

at a radiation-therapy treatment-facilitation platform;

providing treatment-plan information regarding a plurality of different angles of exposure to employ when administering the radiation therapy to the target volume;

using the treatment-plan information to determine corresponding, and differing, aperture configurations for a second collimator that is disposed between a source for the radiation-therapy beam and the multileaf collimator to be dynamically used when administering the radiation therapy for at least some of the differing angles of exposure.

2. The method of claim 1 further comprising;

providing form information regarding the target volume;

and wherein using the treatment-plan information to determine the corresponding, and differing, aperture configurations for the second collimator comprises using the treatment-plan information and the form information to determine the corresponding, and differing, aperture configurations for the second collimator.

3. The method of claim 2 wherein using the treatment-plan information and the form information comprises, at least in part, determining a particular form factor of the target volume as corresponds to each of at least some of the differing angles of exposure.

4. The method of claim 3 wherein using the treatment-plan information and the form information further comprises, at least in part, determining a particular aperture configuration for the second collimator as will best accommodate the particular form factor of the target volume for each of the at least some of the differing angles of exposure.

5. The method of claim 2 wherein using the treatment-plan information and the form information to determine the corresponding, and differing, aperture configurations for the second collimator comprises directly using the form information to determine the aperture configurations.

6. The method of claim 2 wherein using the treatment-plan information and the form information to determine the corresponding, and differing, aperture configurations for the second collimator comprises indirectly using the form information to determine the aperture configurations.

7. The method of claim 6 wherein indirectly using the form information to determine the aperture configurations comprises:

using the form information to determine aperture configurations for the multileaf collimator;

using information regarding the aperture configurations for the multileaf collimator to determine the aperture configurations for the second collimator.

8. The method of claim 1 further comprising:

dynamically using the determined aperture configurations for the second collimator when administering the radiation therapy to the patient.

9. The method of claim 1 further comprising:

using the treatment-plan information to determine corresponding, and differing, aperture configurations for the multileaf collimator to be also used when administering the radiation therapy for at least some of the differing angles of exposure.

10. The method of claim 1 further comprising:

providing information regarding operational capabilities of a platform that will administer the radiation therapy to the patient;

using the information regarding the operational capabilities to vet the determined aperture configurations for the second collimator.

11. The method of claim 10 wherein vetting the determined aperture configurations for the second collimator comprises, at least in part, modifying the determined aperture configurations to ensure that the determined aperture configurations are capable of being implemented by the platform that will administer the radiation therapy to the patient.

12. The method of claim 11 further comprising:

using the treatment-plan information to determine corresponding, and differing, aperture configurations for the multileaf collimator to be also used when administering the radiation therapy for at least some of the differing angles of exposure.

13. The method of claim 12 further comprising:

dynamically using the determined aperture configurations for the second collimator and the multileaf collimator when administering the radiation therapy to the patient.

14. The method of claim 1 wherein the radiation therapy comprises arc therapy.

15. An apparatus for use in administering radiation therapy to a target volume of a patient using a radiation-therapy beam and differing angles of exposure in conjunction with a multileaf collimator, comprising:

a first memory having treatment-plan information regarding a plurality of different angles of exposure to employ when administering the radiation therapy to the target volume stored therein;

a processor operably coupled to the first memory and being configured to use the treatment-plan information to determine corresponding, and differing, aperture configurations for a second collimator that is disposed between a source for the radiation-therapy beam and the multileaf collimator and that is to be dynamically used when administering the radiation therapy for at least some of the differing angles of exposure.

16. The apparatus of claim 15 further comprising:

a second memory having form information regarding the target volume stored therein;

and wherein the processor is also operably coupled to the second memory and is further configured to use the treatment-plan information to determine corresponding, and differing, aperture configurations for a second collimator by using the treatment-plan information and the form information to determine the corresponding, and differing, aperture configurations for the second collimator.

17. The apparatus of claim 16 wherein the processor is configured to use the treatment-plan information and the form information by, at least in part, determining a particular form factor of the target volume as corresponds to each of at least some of the differing angles of exposure.

18. The apparatus of claim 17 wherein the processor is configured to use the treatment-plan information and the form information by, at least in part, determining a particular aperture configuration for the second collimator as will best accommodate the particular form factor of the target volume for each of the at least some of the differing angles of exposure.

19. The apparatus of claim 15 wherein the processor is configured to:

dynamically use the determined aperture configurations for the second collimator when administering the radiation therapy to the patient.

20. The apparatus of claim 15 wherein the processor is configured to:

use the treatment-plan information to determine corresponding, and differing, aperture configurations for the multileaf collimator to be also dynamically used when administering the radiation therapy for at least some of the differing angles of exposure.

21. The apparatus of claim 15 further comprising:

a third memory having information regarding operational capabilities of a platform that will administer the radiation therapy to the patient stored therein;

and wherein the processor is configured to use the information regarding the operational capabilities to vet the determined aperture configurations for the second collimator.

22. The apparatus of claim 21 wherein the processor is configured to vet the determined aperture configurations for the second collimator by, at least in part, modifying the determined aperture configurations to ensure that the determined aperture configurations are capable of being implemented by the platform that will administer the radiation therapy to the patient.

23. The apparatus of claim 22 wherein the processor is configured to:

use the treatment-plan information to determine corresponding, and differing, aperture configurations for the multileaf collimator to be also dynamically used when administering the radiation therapy for at least some of the differing angles of exposure.

24. The apparatus of claim 23 wherein the processor is configured to:

dynamically use the determined aperture configurations for the second collimator and the multileaf collimator when administering the radiation therapy to the patient.

25. The apparatus of claim 15 wherein the radiation therapy comprises arc therapy.

26. An apparatus for use in administering radiation therapy to a target volume of a patient using a radiation-therapy beam and differing angles of exposure in conjunction with a multileaf collimator and a second collimator that is disposed between a source for the radiation-therapy beam and the multileaf collimator, comprising:

a first memory having treatment-plan information regarding a plurality of different angles of exposure to employ when administering the radiation therapy to the target volume stored therein;

a processor operably coupled to the first memory and being configured to use the treatment-plan information to dynamically vary aperture configurations for the second collimator when administering the radiation therapy for at least some of the differing angles of exposure.

27. The apparatus of claim 26 wherein the radiation therapy comprises arc therapy.