Method and system for automated evaluation of multiple portal dose images in radiation therapy

• US 9,956,429 B2
• Filed: 03/28/2011
• Issued: 05/01/2018
• Est. Priority Date: 03/28/2011
• Status: Active Grant

• Current Assignee: Siemens Healthineers International AG (Siemens AG)
• Original Assignee: Varian Medical Systems Incorporated (Siemens AG), Varian Medical Systems International AG (Siemens AG)
• Inventors: Holmes, Todd G., Kleiner, David
• Primary Examiner(s): FUJITA, KATRINA R
• Application Number:
  US13/073,390
• Publication Number:
  US 20120250971A1
• Time in Patent Office: 2,591 Days
• CPC Class Codes: A61N 2005/1054 using a portal imaging system
• CPC Class Codes: A61N 5/1048 Monitoring, verifying, controlling systems and methods
• CPC Class Codes: A61N 5/1071 for verifying the dose delivered by the treatment plan
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Abstract

A method of evaluating a portal dose image includes obtaining a template from a database, the template prescribing one or more evaluation criteria, receiving a first portal dose image, and using a processor to evaluate the first portal dose image based at least in part on the one or more evaluation criteria from the template. In some embodiments, a second image is automatically evaluated after the first image is evaluated. A system for evaluating a portal dose image includes a processor that is communicatively coupled to a database, the database having a template that prescribes one or more evaluation criteria, wherein the processor is configured to obtain the template from the database, receive a first portal dose image, and evaluate the first portal dose image based at least in part on the one or more evaluation criteria from the template.

Claims

1. A method of evaluating a portal dose image, comprising:

obtaining a file of a template from a database, the template having one or more configurable field relating to dose image feature(s) to allow selectively prescribing of one or more evaluation parameters and one or more evaluation criteria, wherein the act of obtaining the template is performed by a processor;

receiving a first portal dose image of a patient, wherein the first portal dose image is generated by a portal imager in response to radiation in accordance with a treatment plan, the treatment plan being different from the template; and

after the first portal dose image is received, using the one or more evaluation parameters and the one or more evaluation criteria from the template by the processor to evaluate the first portal dose image.

2. The method of claim 1, further comprising automatically using the one or more evaluation criteria from the template to evaluate a second portal dose image.

3. The method of claim 2, wherein the first and second portal dose images are for different respective fields of the treatment plan.

4. The method of claim 2, wherein the first and second portal dose images are for different sessions of the treatment plan.

5. The method of claim 2, wherein the first portal dose image is for the treatment plan, and the second portal dose image is for another treatment plan.

6. The method of claim 1, wherein the one or more evaluation criteria comprises one or more tests, one or more thresholds, one or more tolerances, one or more preprocessing steps, or combination thereof.

7. The method of claim 1, wherein the database comprises a plurality of templates that include the template, and the act of obtaining the template comprises selecting the template from the plurality of templates.

8. The method of claim 1, wherein the act of evaluation is performed automatically after the first portal dose image is generated.

9. The method of claim 1, wherein the processor evaluates the first portal dose image by performing a first test and a second test, wherein the second test is automatically performed by the processor after the first test is performed.

10. The method of claim 1, further comprising using the processor to evaluate a second portal dose image, wherein the second portal dose image is evaluated automatically by the processor after the first portal dose image is evaluated.

11. The method of claim 1, further comprising:

generating a report that summarizes a result of the evaluation; and

storing the report in a medium or presenting the report on a screen.

12. The method of claim 11, wherein the report also summarizes another result of an evaluation of a second portal dose image.

13. The method of claim 12, wherein the report also provides an overall result that is derived from the results of the evaluations of the first and second portal dose images.

14. The method of claim 13, wherein the result of the evaluation of the first portal dose image comprises a first set of test results from a first plurality of tests for evaluating the first portal dose image, and the result of the evaluation of the second portal dose image comprises a second set of test results from a second plurality of tests for evaluating the second portal dose image.

15. The method of claim 1, further comprising:

obtaining a first dose evaluation image using a first result of the evaluation; and

displaying the first dose evaluation image on a screen.

16. The method of claim 15, further comprising:

obtaining a second dose evaluation image using a second result of an evaluation of a second portal dose image, wherein the act of obtaining the second dose evaluation image is performed automatically after the first dose evaluation image is obtained; and

displaying the second dose evaluation image on the screen.

17. The method of claim 1, wherein the first portal dose image is evaluated during an operation of a treatment radiation machine.

18. The method of claim 1, wherein the first portal dose image is evaluated while a treatment radiation machine is in a stand-by mode.

19. The method of claim 1, wherein the template prescribes multiple dose image tests be performed.

20. The method of claim 19, wherein the multiple dose image tests comprise (1) an area gamma test, (2) a maximum gamma test, (3) an average gamma test, (4) a gamma test with respect to a largest connected area (LCA), (5) a maximum dose difference value test, (6) an average dose difference value test, or (7) any combination of the foregoing.

21. The method of claim 1, wherein the template prescribes an area dose difference test be performed.

22. The method of claim 1, wherein the template prescribes multiple tests to be performed to evaluate the first portal dose image.

23. The method of claim 1, further comprising outputting multiple test results for the first portal dose image based on the template.

24. The method of claim 1, wherein the act of using the processor to evaluate the first portal dose image comprises using the processor to evaluate different aspects of the first portal dose image.

25. The method of claim 1, wherein the act of using the processor to evaluate the first portal dose image comprises determining if at least one of the one or more evaluation parameters satisfies at least one of the one or more evaluation criteria.

26. The method of claim 1, wherein the one or more evaluation parameters comprise multiple evaluation parameters, and the one or more evaluation criteria comprise multiple evaluation criteria for the respective multiple evaluation parameters;

and

wherein the act of using the processor to evaluate the first portal dose image comprises determining if the multiple evaluation parameters satisfy the multiple evaluation criteria, respectively.

27. A system for evaluating a portal dose image, comprising:

a processor that is communicatively coupled to a database, the database having a file of a template that includes one or more configurable fields relating to dose image feature(s) to allow selectively prescribing of one or more evaluation parameters and one or more evaluation criteria;

wherein the processor is configured to (1) obtain the template from the database, (2) receive a first portal dose image of a patient, and (3) after the first portal dose image is received, use the one or more evaluation parameters and the one or more evaluation criteria from the template to evaluate the first portal dose image, wherein the first portal dose image is generated by a portal imager in response to radiation in accordance with a treatment plan, the treatment plan being different from the template.

28. The system of claim 27, wherein the processor is configured for automatically using the one or more evaluation criteria from the template to evaluate a second portal dose image.

29. The system of claim 28, wherein the first and second portal dose images are for different respective fields of the treatment plan.

30. The system of claim 28, wherein the first and second portal dose images are for different sessions of the treatment plan.

31. The system of claim 28, wherein the first portal dose image is for the treatment plan, and the second portal dose image is for another treatment plan.

32. The system of claim 27, wherein the one or more evaluation criteria comprises one or more tests, one or more thresholds, one or more tolerances, one or more preprocessing steps, or combination thereof.

33. The system of claim 27, further comprising a database that stores a plurality of templates, wherein the processor is configured to obtain the template by selecting the template from the plurality of templates.

34. The system of claim 27, wherein the processor is configured to perform the evaluation automatically after the first portal dose image is generated.

35. The system of claim 27, wherein the processor is configured to evaluate the first portal dose image by performing a first test and a second test, and wherein the processor is configured to automatically perform the second test after the first test is performed.

36. The system of claim 27, wherein the processor is configured to evaluate a second portal dose image automatically after the first portal dose image is evaluated.

37. The system of claim 27, wherein the processor is configured to generate a report that summarizes a result of the evaluation.

38. The system of claim 37, wherein the report also summarizes another result of an evaluation of a second portal dose image.

39. The system of claim 38, wherein the report also provides an overall result that is derived from the results of the evaluations of the first and second portal dose images.

40. The system of claim 39, wherein the result of the evaluation of the first portal dose image comprises a first set of test results from a first plurality of tests for evaluating the first portal dose image, and the result of the evaluation of the second portal dose image comprises a second set of test results from a second plurality of tests for evaluating the second portal dose image.

41. The system of claim 27, wherein the processor is configured to determine a first dose evaluation image using a first result of the evaluation, and automatically determine a second dose evaluation image after the first dose evaluation image is determined.

42. The system of claim 27, wherein the processor is configured to evaluate the first portal dose image during an operation of a treatment radiation machine.

43. The system of claim 27, wherein the processor is configured to evaluate the first portal dose image while a treatment radiation machine is in a stand-by mode.

44. The system of claim 27, wherein the template prescribes multiple dose image tests be performed.

45. The system of claim 44, wherein the multiple dose image tests comprise (1) an area gamma test, (2) a maximum gamma test, (3) an average gamma test, (4) a gamma test with respect to a largest connected area (LCA), (5) a maximum dose difference value test, (6) an average dose difference value test, or (7) any combination of the foregoing.

46. The system of claim 27, wherein the template prescribes an area dose difference test be performed.

47. The system of claim 27, wherein the template prescribes multiple tests to be performed to evaluate the first portal dose image.

48. The system of claim 27, wherein the processor is also configured to output multiple test results for the first portal dose image based on the template.

49. The system of claim 27, wherein the processor is configured to evaluate the first portal dose image by determining different aspects of the first portal dose image.

50. The system of claim 27, wherein the processor is configured to evaluate the first portal dose image by determining if at least one of the one or more evaluation parameters satisfies at least one of the one or more evaluation criteria.

51. The system of claim 27, wherein the one or more evaluation parameters comprise multiple evaluation parameters, and the one or more evaluation criteria comprise multiple evaluation criteria for the respective multiple evaluation parameters;

and

wherein the processor is configured to evaluate the first portal dose image comprises by determining if the multiple evaluation parameters satisfy the multiple evaluation criteria, respectively.

52. A computer product having a non-transitory medium that stores a set of instruction, an execution of which by a processor causes a process for evaluating a portal dose image to be performed, the process comprising:

obtaining a file of a template from a database, the template having one or more configurable fields relating to dose image feature(s) to allow selectively prescribing of one or more evaluation parameters and one or more evaluation criteria;

receiving a first portal dose image of a patient, wherein the first portal dose image is generated by a portal imager in response to radiation in accordance with a treatment plan, the treatment plan being different from the template; and

after the first portal dose image is received, using the one or more evaluation parameters and the one or more evaluation criteria from the template by the processor to evaluate the first portal dose image.

53. The computer product of claim 52, wherein the first portal dose image is evaluated during an operation of a treatment radiation machine.

54. The computer product of claim 52, wherein the first portal dose image is evaluated while a treatment radiation machine is in a stand-by mode.

55. The computer product of claim 52, wherein the template prescribes multiple dose image tests be performed.

56. The computer product of claim 55, wherein the multiple dose image tests comprise (1) an area gamma test, (2) a maximum gamma test, (3) an average gamma test, (4) a gamma test with respect to a largest connected area (LCA), (5) a maximum dose difference value test, (6) an average dose difference value test, or (7) any combination of the foregoing.

57. The computer product of claim 52, wherein the template prescribes an area dose difference test be performed.

58. The computer product of claim 52, wherein the template prescribes multiple tests to be performed to evaluate the first portal dose image.

59. The computer product of claim 52, wherein the process further comprises outputting multiple test results for the first portal dose image based on the template.

60. The computer product of claim 52, wherein the act of using the processor to evaluate the first portal dose image comprises using the processor to evaluate different aspects of the first portal dose image.

61. The computer product of claim 52, wherein the act of using the processor to evaluate the first portal dose image comprises determining if at least one of the one or more evaluation parameters satisfies at least one of the one or more evaluation criteria.

62. The computer product of claim 52, wherein the one or more evaluation parameters comprise multiple evaluation parameters, and the one or more evaluation criteria comprise multiple evaluation criteria for the respective multiple evaluation parameters;

and

wherein the act of using the processor to evaluate the first portal dose image comprises determining if the multiple evaluation parameters satisfy the multiple evaluation criteria, respectively.