Radiation treatment trajectory and planning methods

• US 7,773,723 B2
• Filed: 08/29/2008
• Issued: 08/10/2010
• Est. Priority Date: 08/28/2008
• 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): Glick; Edward J
• Assistant Examiner(s): Midkiff; Anastasia
• Application Number:
  US12/201,271
• Publication Number:
  US 20100051824A1
• Time in Patent Office: 711 Days
• Field of Search: 378/65, 378/210, 600425-429
• US Class Current: 378/65
• CPC Class Codes: A61N 5/1031 using a specific method of dose optimization
• CPC Class Codes: A61N 5/1047 with movement of the radiation head during application of radiation, e.g. for intensity modulated arc therapy or IMAT
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Abstract

A radiation system includes a radiation source, and a patient support for supporting a patient, the patient support located adjacent to the radiation source such that the radiation source can deliver radiation towards the patient while the patient is supported on the patient support, wherein the patient support and the radiation source are positionable at least partially around a same spatial region. A system for use to determine a treatment plan includes a user interface for allowing a user to define a plurality of control points, a first parameter, and a second parameter, wherein the user interface also allows the user to prescribe which of the first and second parameters is to be optimized, and which of the first and second parameters is to be interpolated.

Claims

1. A method of determining a treatment plan, comprising:

determining a machine parameter;

using an optimization technique to determine a first value for the machine parameter, the first value representing a first condition of a machine to be achieved during a treatment;

using interpolation of the machine parameter to prescribe a second condition of the machine to be achieved during the treatment; and

storing the first value in a computer-readable medium;

wherein the act of using the optimization technique and the act of using interpolation are performed by a processor.

2. The method of claim 1, further comprising using the optimization technique to determine a second value for the machine parameter, wherein the interpolation is based on the first and second values.

3. The method of claim 1, wherein the machine comprises a radiation treatment machine having a gantry, a radiation source, and a collimator.

4. The method of claim 3, wherein the first condition of the machine comprises a first position of a gantry, a first position of the radiation source, or first position of the collimator.

5. The method of claim 4, wherein the second condition of the machine comprises a second position of a gantry, a second position of the radiation source, or second position of the collimator.

6. The method of claim 1, wherein the second condition is prescribed without optimization of the machine parameter for the second condition.

33. The method of claim 1, wherein the act of using interpolation to prescribe the second condition of the machine to be achieved during the treatment comprises:

obtaining a first user defined value that represents a first desired machine state;

obtaining a second user defined value that represents a second desired machine state; and

interpolating between the first and second user defined values to obtain one or more interpolated machine states, wherein the one or more interpolated machine states comprise the second condition of the machine to be achieved during the treatment.

34. The method of claim 1, further comprising:

determining a complexity of a fluence; and

changing a control point associated with the machine parameter based at least in part on the complexity of the fluence.

35. The method of claim 1, further comprising:

determining a plurality of control points, one of the plurality of control points corresponding to the machine parameter; and

determining a plurality of dose calculation points, wherein the number of the dose calculation points is less than the number of the control points.

7. A system for use to determine a treatment plan, comprising:

a user interface for allowing a user to define a plurality of control points for a treatment plan;

wherein the user interface is configured for allowing a user to selectively choose one or both of two available choices for a first machine parameter for one of the control points, said two available choices being optimization and/or interpolation of said first machine parameter in a treatment planning process, and for allowing the user to selectively choose one or both of two available choices for a second machine parameter for the one of the control points, wherein said two available choices includes optimization and interpolation of said second machine parameter in the treatment planning process.

8. The system of claim 7, wherein the plurality of control points correspond with respective time points or intervals.

9. The system of claim 7, wherein the user interface is configured for allowing the user to prescribe whether dose is to be delivered for a time interval that corresponds with one of the control points.

10. The system of claim 7, further comprising a medium for storing the defined control points and the first and second machine parameters as a trajectory class.

11. The system of claim 7, wherein the user interface is configured to allow the user to scale a value for one of the machine parameters using a multiplier.

12. The system of claim 7, wherein the user interface is configured to allow the user to adjust a value for one of the machine parameters by adding a constant value.

13. The system of claim 7, further comprising a processor for performing an optimization for the first or second machine parameter using a geometric evaluation.

14. The system of claim 7, further comprising a processor for performing an optimization for the first or second machine parameter using a dose based method.

15. The system of claim 14, wherein the dose based method comprises a direct aperture method.

16. The system of claim 14, wherein the dose based method comprises a fluence based method.

17. The system of claim 7, wherein one of the first and second machine parameters that is prescribed to be optimized corresponds with one of the control points, and the user interface is configured for allowing the user to define a value for the one of the first and second machine parameters that is prescribed to be optimized.

18. The system of claim 7, wherein the user interface is configured for allowing the user to define a value for an optimizable parameter between two of the control points.

19. The system of claim 18, wherein the optimizable parameter comprises one of the first and second machine parameters that is prescribed to be optimized.

20. The system of claim 7, wherein the user interface comprises a screen for presenting information to the user, and an input device for receiving input from the user.

21. The system of claim 7, wherein the first machine parameter is optimized and the second machine parameter is interpolated, the system further comprising a computer-readable medium for storing the optimized first machine parameter and the interpolated second machine parameter as parts of the treatment plan.

36. The system of claim 7, further comprising a processor configured to perform the interpolation of the first or second machine parameter by:

obtaining a first value that represents a first desired machine state;

obtaining a second value that represents a second desired machine state; and

interpolating between the first and second values to obtain one or more interpolated machine states that are to be achieved during a treatment.

37. The system of claim 7, further comprising a processor configured to determine a complexity of a fluence, and change one or more of the plurality of control points based at least in part on the complexity of the fluence.

38. The system of claim 7, wherein the user interface also allows the user to define a plurality of dose calculation points, wherein the number of the dose calculation points is less than the number of the control points.

22. A system for use to determine a treatment plan, comprising:

a user interface for allowing a user to define a control point for a treatment plan;

wherein the user interface is configured for allowing the user to selectively choose one or both of two available choices for a machine parameter for the control point, wherein said two available choices includes optimization and interpolation of said machine parameter in a treatment planning process.

23. The system of claim 22, wherein the control point corresponds with a time point or interval.

24. The system of claim 22, wherein the user interface is configured for allowing the user to prescribe whether dose is to be delivered for a time interval that corresponds with the control point.

25. The system of claim 22, further comprising a medium for storing the defined control point and the machine parameter as a trajectory class.

26. The system of claim 22, wherein the user interface is configured to allow the user to scale a value for the machine parameter using a multiplier.

27. The system of claim 22, wherein the user interface is configured to allow the user to adjust a value for the machine parameter by adding a constant value.

28. The system of claim 22, further comprising a processor for performing an optimization of the machine parameter using a geometric evaluation.

29. The system of claim 22, further comprising a processor for performing an optimization of the machine parameter using a dose based method.

30. The system of claim 29, wherein the dose based method comprises a direct aperture method.

31. The system of claim 29, wherein the dose based method comprises a fluence based method.

32. The system of claim 22, wherein the user interface comprises a screen for presenting information to the user, and an input device for receiving input from the user.

39. The system of claim 22, wherein the user interface is configured to perform the interpolation of the machine parameter by:

obtaining a first value that represents a first desired machine state;

obtaining a second value that represents a second desired machine state; and

interpolating between the first and second values to obtain one or more interpolated machine states that are to be achieved during a treatment.

40. The system of claim 22, further comprising a processor configured to determine a complexity of a fluence, and change the control point based at least in part on the complexity of the fluence.

41. The system of claim 22, wherein the user interface also allows the user to define additional control points for the treatment plan, and dose calculation points, wherein the number of the dose calculation points is less than the number of the control points.