Systems and methods for global optimization of treatment planning for external beam radiation therapy

• US 7,046,762 B2
• Filed: 12/18/2003
• Issued: 05/16/2006
• Est. Priority Date: 11/05/1999
• Status: Expired due to Fees

• Current Assignee: Emory University, Georgia Tech Research Corporation (University System of Georgia)
• Original Assignee: Georgia Tech Research Corporation (University System of Georgia)
• Inventors: Lee, Eva K.
• Primary Examiner(s): Bruce, David V
• Application Number:
  US10/742,471
• Publication Number:
  US 20040165696A1
• Time in Patent Office: 880 Days
• Field of Search: 378/64, 378/65, 378/901
• US Class Current: 378/65
• CPC Class Codes: A61N 5/1031 using a specific method of dose optimization
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 30/20 for handling medical images, e.g. DICOM, HL7 or PACS
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

Systems and methods for providing an optimal treatment plan for delivering a prescribed radiation dose to a predefined target volume within a patient using an external beam radiation delivery unit are provided. One such method comprises: receiving information corresponding to at least one parameter related to intensity-modulated radiation therapy (IMRT) to be used in developing the optimal treatment plan; receiving information corresponding to at least one clinical objective related to a target volume and a critical structure; developing a treatment plan optimization model based on a plurality of variables corresponding to the at least one parameter related to IMRT and the at least one clinical objective which define a global system; and developing a globally optimal treatment plan which optimizes the at least one clinical objective subject to the at least one parameter.

Claims

1. A method for developing an optimal treatment plan for treatment of a target volume within a patient using an external beam radiation delivery unit, the method comprising:

receiving information corresponding to at least one parameter related to intensity-modulated radiation therapy (IMRT) to be used in developing the optimal treatment plan;

receiving information corresponding to at least one clinical objective related to a target volume and a critical structure;

developing a treatment plan optimization model based on a plurality of variables corresponding to the at least one parameter related to IMRT and the at least one clinical objective which define a global system; and

developing a globally optimal treatment plan which optimizes the at least one clinical objective subject to the at least one parameter.

2. The method of claim 1, further comprising providing a visual tool for enabling a user to evaluate the globally optimal treatment plan.

3. The method of claim 2, wherein the providing a visual tool comprises providing an isodose curve corresponding to the globally optimal treatment plan.

4. The method of claim 2, wherein the providing a visual tool comprises providing at least one of a dose-volume histogram, a coverage index, a conformity index, a homogeneity index, a tumor control and normal tissue complication probability index, and a display of clinical metrics to the user.

5. The method of claim 1, wherein the receiving the information corresponding to at least one parameter related to IMRT comprises receiving information corresponding to at least one of a beamlet fluence parameter, a field segments parameter, a couch angles parameter, a gantry angles parameter, and a plurality of beam geometry parameters.

6. The method of claim 1, further comprising receiving information corresponding to at least one constraint to be incorporated into the treatment plan optimization model.

7. The method of claim 6, wherein the receiving information corresponding to at least one constraint comprises receiving information corresponding to at least one of a dosimetric constraint and a beam geometry constraint.

8. The method of claim 7, wherein the developing a treatment plan optimization model is further based on the at least one constraint and the developing a globally optimal treatment plan comprises developing a globally optimal treatment plan which optimizes the at least one clinical objective subject to the at least one parameter and the at least one constraint.

9. The method of claim 1, wherein at least one of the plurality of variables is one of a 0/1 variable and a non-negative continuous variable.

10. The method of claim 1, wherein the developing a globally optimal treatment plan comprises:

defining a solution space according to a set of constraints; and

determining the best solution within the solution space.

11. A system for optimizing treatment planning in intensity-modulation radiation therapy (IMRT), the system comprising:

a user interface for enabling a user to specify, at least one parameter related to IMRT, at least one constraint, and at least one clinical objective;

a treatment plan modeling module configured to develop a treatment plan optimization model containing a plurality of variables corresponding to the at least one parameter related to IMRT, the at least one constraint, and the at least one clinical objective; and

a global optimization module configured to calculate a globally optimal treatment plan which optimizes the at least one clinical objective subject to the at least one parameter related to IMRT and the at least one constraint.

12. The system of claim 11, further comprising a visual evaluation functionality that supports a visual tool for enabling a user to evaluate the globally optimal treatment plan.

13. The system of claim 12, wherein the visual evaluation functionality is configured to display an isodose curve corresponding to the globally optimal treatment plan.

14. The system of claim 12, wherein the visual evaluation functionality is configured to display a dose-volume histogram, a coverage index, a conformity index, a homogeneity index, a tumor control and normal tissue complication probability index, and a display of clinical metrics to the user.

15. The system of claim 11, wherein the user interface is configured to enable a user to specify at least one of a beamlet fluence parameter, a field segments parameter, a couch angles parameter, a gantry angles parameter, and a plurality of beam geometry parameters.

16. The system of claim 11, wherein the user interface is configured to enable a user to specify a candidate beam profile, at least one dose parameter, at least one clinical parameter, at least one clinical objective, at least one dosimetric constraint, and at least one beam geometry constraint.

17. The system of claim 11, wherein the treatment plan modeling module is configured to develop a treatment plan optimization model containing at least one 0/1 variable.

18. The system of claim 11, wherein the global optimization module is further configured to define a solution space according to a set of constraints and determine the best solution within the solution space.

19. A system for optimizing treatment planning in intensity-modulation radiation therapy (IMRT), the system comprising:

means for interfacing with an I/O device to enable a user to specify at least one parameter related to IMRT, at least one constraint, and at least one clinical objective;

means for modeling a global system based on a plurality of variables corresponding to the at least one parameter related to IMRT, the at least one constraint, and the at least one clinical objective; and

means for calculating a globally optimal treatment plan which optimizes the at least one clinical objective subject to the at least one parameter related to IMRT and the at least one constraint.

20. A computer program embodied in a computer-readable medium for optimizing treatment planning in intensity-modulation radiation therapy (IMRT), the computer program comprising:

logic configured to interface with a user and enable the user to specify at least one parameter related to IMRT, at least one constraint, and at least one clinical objective;

logic configured to develop a treatment plan optimization model containing a plurality of variables corresponding to the at least one parameter related to IMRT, the at least one constraint, and the at least one clinical objective; and

logic configured to calculate a globally optimal treatment plan which optimizes the at least one clinical objective subject to the at least one parameter related to IMRT and the at least one constraint.

21. The computer program of claim 20, further comprising a logic configured to provide a visual tool for enabling a user to evaluate the globally optimal treatment plan.

22. The computer program of claim 21, wherein the logic configured to provide a visual tool comprises logic configured to display at least one of the following to a user:

an isodose curve corresponding to the globally optimal treatment plan, a dose-volume histogram corresponding to the globally optimal treatment plan, a coverage index corresponding to the globally optimal treatment plan, a conformity index corresponding to the globally optimal treatment plan, a homogeneity index corresponding to the globally optimal treatment plan, a tumor control and normal tissue complication probability index corresponding to the globally optimal treatment plan, and a display of clinical metrics corresponding to the globally optimal treatment plan.

23. The computer program of claim 20, wherein the logic configured to interface comprises logic configured to enable a user to specify at least one of a beamlet fluence parameter, a field segments parameter, a couch angles parameter, a gantry angles parameter, and a plurality of beam geometry parameters.

24. The computer program of claim 20, wherein the logic configured to interface comprises logic configured to enable a user to specify a candidate beam profile, at least one dose parameter, at least one clinical parameter, at least one clinical objective, at least one dosimetric constraint, and at least one beam geometry constraint.

25. The computer program of claim 20, wherein the logic configured to develop a treatment plan optimization model comprises logic configured to develop a treatment plan optimization model containing at least one 0/1 variable.

26. The computer program of claim 20, wherein the logic configured to calculate a globally optimal treatment plan comprises logic configured to define a solution space according to a set of constraints and determine the best solution within the solution space.