Interactive treatment plan optimization for radiation therapy

• US 7,817,778 B2
• Filed: 08/29/2008
• Issued: 10/19/2010
• Est. Priority Date: 08/29/2008
• Status: Active Grant

• Current Assignee: Varian Medical Systems International AG (Siemens AG)
• Original Assignee: Varian Medical Systems International AG (Siemens AG)
• Inventors: Nord, Janne Ilmari, Peltola, Jarkko Yrjana
• Primary Examiner(s): KAO, CHIH CHENG G
• Application Number:
  US12/201,785
• Publication Number:
  US 20100054411A1
• Time in Patent Office: 781 Days
• Field of Search: 378/65
• 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

Abstract

An interactive method for radiation treatment planning is disclosed. The method applies to staged treatment planning algorithms, as used, for example, with arc therapy. It allows the user to hold the optimization algorithm at a stage in order to make adjustments to the objective function before advancing to the next stage. If adjustments are made, the user can revert to an earlier stage and re-run the optimization process using the adjusted objective function. While a hold is imposed, the treatment planning software may continue optimization at the current stage.

Claims

1. A non-transitory tangible medium having treatment planning software stored thereon, said software comprising one or more algorithms for optimizing a treatment plan in stages according to a preprogrammed schedule based on an objective function including patient specific information, said software having an interactive mode, wherein said interactive mode comprises:

code for holding the optimization process at a user-selected stage until receiving user instructions;

code for accepting user adjustments to the objective function while the optimization process is underway; and

code for restarting the optimization at a user-selected stage after adjustments have been made to the objective function.

2. The non-transitory tangible medium of claim 1, further comprising code for revising the preprogrammed schedule.

3. The non-transitory tangible medium of claim 1, further comprising code for adjusting the objective function while the optimization process is underway without imposing a hold.

4. The non-transitory tangible medium of claim 1, wherein said code for holding the optimization process at a user-selected stage permits continued optimization at that stage while awaiting user instructions.

5. A method of treatment planning for radiotherapy using interactive treatment planning software having one or more optimization algorithms, comprising:

defining an initial objective function comprising a plurality of fields including fields comprising patient specific information,

dividing the optimization process into a plurality of sequential stages with software running on a computer, wherein fields are added to the optimization process at different stages according to a preprogrammed schedule unless a hold is imposed,

holding the optimization process in response to user request,

after the user hold is imposed, continuing the optimization process at the current stage until receiving further instructions.

6. The method of claim 5 further comprising the step of adjusting the objective function after the hold has been imposed and proceeding with optimization using the adjusted objective function.

7. The method of claim 6 further comprising reverting to an earlier stage after the objective function has been adjusted.

8. The method of claim 6 further comprising making further a adjustment to the objective function after evaluating the results attained after making the initial adjustment.