Method for automatic anatomy-specific treatment planning protocols based on historical integration of previously accepted plans

• US 7,362,848 B2
• Filed: 06/27/2005
• Issued: 04/22/2008
• Est. Priority Date: 06/27/2005
• Status: Active Grant

• Current Assignee: Accuray Incorporated
• Original Assignee: Accuray Incorporated
• Inventors: Saracen, Michael J., West, Jay B.
• Primary Examiner(s): Yun; Jurie
• Application Number:
  US11/168,613
• Publication Number:
  US 20060293583A1
• Time in Patent Office: 1,030 Days
• Field of Search: 378/64, 378/65, 604/20
• US Class Current: 378/65
• CPC Class Codes: A61N 2005/1041 using a library of previously administered radiation treatment applied to other patients
• CPC Class Codes: A61N 5/1038 taking into account previously administered plans applied to the same patient, i.e. adaptive radiotherapy

Abstract

A method of automatically optimizing an inverse treatment plan by referencing data from accepted plan libraries.

Claims

1. A method, comprising:

generating a current dose volume histogram for a volume of interest during a radiation treatment planning process, the current dose volume histogram based on a parameter for a treatment planning constraint; and

adjusting automatically the treatment constraint to conform the current dose volume histogram with an accepted dose volume histogram from a plan library.

2. The method of claim 1, wherein generating further comprises calculating a dose volume histogram for a target region and a dose volume histogram for a critical region.

3. The method of claim 2, wherein adjusting further comprises comparing the dose volume histogram for the target region with an accepted dose volume histogram from the plan library corresponding to a volume of interest that includes the target region.

4. The method of claim 2, wherein adjusting further comprises comparing the dose volume histogram for the critical region with an accepted dose volume histogram from the plan library corresponding to a volume of interest that includes the critical region.

5. The method of claim 2, wherein generating further comprises contouring a pathological anatomy and a critical structure visualized on a display screen.

6. The method of claim 1, wherein adjusting further comprises determining a deviation between the current dose volume histogram and the accepted dose volume histogram.

7. The method of claim 1, wherein the parameter comprises a beam weight and adjusting further comprises modifying the beam weight.

8. The method of claim 7, wherein modifying further comprises incrementally increasing the beam weight until the current dose volume histogram closely matches the accepted dose volume histogram.

9. The method of claim 7, wherein modifying further comprises incrementally decreasing the beam weight until the current dose volume histogram closely matches the accepted dose volume histogram.

10. The method of claim 1, wherein generating further comprises contouring a pathological anatomy to identify a target region and contouring a critical structure to identify a critical region.

11. The method of claim 1, wherein generating further comprises:

generating a current conformality index for the volume of interest; and

adjusting automatically the treatment constraint to conform the current conformality index with an accepted conformality index from the plan library.

12. The method of claim 1, wherein the radiation treatment planning process comprises inverse planning.

13. A method, comprising:

generating a first contour around a pathological anatomy, within a volume of interest, to identify a target region and a second contour around a critical structure to identify a critical region;

assigning a first beam weight associated with a first radiation beam directed towards the target region;

generating a current dose volume histogram for the critical region based on the first beam weight; and

adjusting automatically the first beam weight to conform the current dose volume histogram for the critical region to a dose volume histogram from a plan library.

14. The method of claim 13, wherein adjusting further comprises deriving the dose volume histogram from the plan library from a plurality of accepted plans.

15. The method of claim 14, wherein adjusting further comprises calculating a deviation between the current dose volume histogram for the critical region and the dose volume histogram from the plan library.

16. The method of claim 15, wherein adjusting further comprises modifying the first beam weight to a second beam weight.

17. The method of claim 16, wherein modifying further comprises incrementally increasing the first beam weight to the second beam weight until the current dose volume histogram closely matches the dose volume histogram from the plan library.

18. The method of claim 16, wherein modifying further comprises incrementally decreasing the first beam weight to the second beam weight until the current dose volume histogram closely matches the dose volume histogram from the plan library.

19. The method of claim 14, wherein deriving further comprises calculating a mean value from a plurality of accepted plans.

20. The method of claim 13, wherein generating the current dose volume histogram for the critical region further comprises generating a current dose volume histogram for the target region.

21. The method of claim 20, wherein adjusting further comprises calculating a deviation between the current dose volume histogram for the target region and the dose volume histogram from the plan library.

22. The method of claim 21, wherein adjusting further comprises modifying the first beam weight to a second beam weight.

23. The method of claim 22, wherein modifying further comprises incrementally increasing the first beam weight to the second beam weight until the current dose volume histogram closely matches the dose volume histogram from the plan library.

24. The method of claim 22, wherein modifying further comprises incrementally decreasing the first beam weight to the second beam weight until the current dose volume histogram closely matches the dose volume histogram from the plan library.

25. An apparatus, comprising:

means for generating a current dose volume histogram for a volume of interest during inverse planning based on a parameter for a treatment planning constraint; and

means for adjusting automatically the treatment constraint to conform the current dose volume histogram with an accepted dose volume histogram from a plan library.

26. The apparatus of claim 25, wherein means for adjusting further comprises means for comparing a current dose volume histogram for a target region with an accepted dose volume histogram from the plan library corresponding to a volume of interest that includes the target region.

27. The apparatus of claim 25, wherein means for adjusting further comprises means for comparing a dose volume histogram for a critical region with an accepted dose volume histogram from the plan library corresponding to a volume of interest that includes the critical region.

28. The apparatus of claim 25, wherein means for adjusting further comprises means for determining a deviation between the current dose volume histogram and the accepted dose volume histogram.

29. The apparatus of claim 25, wherein the parameter comprises a beam weight and means for adjusting further comprises means for modifying the beam weight.

30. An apparatus, comprising:

a database to store a plan library comprising an accepted dose volume histogram; and

a processor coupled to the database to compare the accepted dose volume histogram with a current dose volume histogram and automatically adjust a parameter for a treatment planning constraint to conform the current dose volume histogram with the accepted dose volume histogram.

31. The apparatus of claim 30, further comprising a memory coupled to the processor, the memory to store the accepted dose volume histogram and the current dose volume histogram during a comparison.

32. The apparatus of claim 30, wherein the processor is configured to calculate a deviation of the current dose volume histogram with respect to the accepted dose volume histogram.

33. The apparatus of claim 30, wherein the parameter comprises a radiation beam weight.

34. A machine readable medium having instructions thereon, which when executed by a processor, cause the processor to perform the following comprising:

generating a current dose volume histogram for a volume of interest during a radiation treatment planning process, the current dose volume histogram based on a parameter for a treatment planning constraint; and

adjusting automatically the treatment constraint to conform the current dose volume histogram with an accepted dose volume histogram from a plan library.

35. The machine readable medium of claim 34, wherein adjusting further comprises comparing a current dose volume histogram for a target region with an accepted dose volume histogram from the plan library corresponding to a volume of interest that includes the target region.

36. The machine readable medium of claim 34, wherein adjusting further comprises comparing a current dose volume histogram for a critical region with an accepted dose volume histogram from the plan library corresponding to a volume of interest that includes the critical region.

37. The machine readable medium of claim 34, wherein adjusting further comprises determining a deviation between the current dose volume histogram and the accepted dose volume histogram.

38. The machine readable medium of claim 34, wherein the parameter comprises a beam weight and adjusting further comprises modifying the beam weight.