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Optimal system of radiotherapy plan based on Monte Carlo tree search

A radiation therapy and tree search technology, applied in the field of radiation therapy plan optimization system based on Monte Carlo tree search, can solve a large number of iterative trial and error problems, achieve the effect of unified standards, save the workload of plan optimization, and achieve objective and accurate results

Active Publication Date: 2022-05-13
北京东方瑞云科技有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to propose a radiation treatment plan optimization system and method based on Monte Carlo tree search, to solve the problem that the radiation treatment plan optimization scheme in the traditional technology needs to rely on a lot of iterative trial and error and the experience of senior physicists

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  • Optimal system of radiotherapy plan based on Monte Carlo tree search
  • Optimal system of radiotherapy plan based on Monte Carlo tree search

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Embodiment

[0050] This embodiment is an embodiment of a radiation treatment plan optimization method based on Monte Carlo tree search. This embodiment uses Varian's Eclipse TPS for rectal cancer, and uses Varian's published script based on IMRT treatment. Interface Eclipse Script API implementation. The implementation steps of the method for optimizing the radiotherapy plan are as follows: figure 2 shown, including:

[0051] 1. Select a group of target parameters as the initial value of the radiotherapy plan optimization process, and determine a plan evaluation standard according to the characteristics of the disease to be radiotherapy;

[0052] In this step, the selected target parameters come from the template target parameters commonly used by physicists, or from the dose value predicted by the machine learning model; the selected set of target parameters specifically includes target area target parameters and organ-at-risk target parameters; When determining the evaluation criteri...

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Abstract

The present invention relates to the field of radiotherapy plan optimization, which discloses a radiotherapy plan optimization system and method based on Monte Carlo tree search. Solving the radiotherapy plan optimization scheme in the traditional technology requires a lot of iterative trial and error and the experience of senior physicists The problem. The method comprises the steps of: a. selecting a group of target parameters as the initial value of the radiotherapy plan optimization process, and determining a plan evaluation standard according to the characteristics of the disease to be radiotherapy; b. performing a Monte Carlo tree search operation in combination with the plan evaluation standard cycle, Until a set of optimized target parameters is obtained; c. Perform dose calculation on the optimized target parameters, and check whether the calculation results meet the optimization requirements, if they meet, end the process, if not, go to step d; d. Optimize the group Fine-tune the target parameters and return to step b. In addition, the invention also discloses a radiotherapy plan optimization system based on Monte Carlo tree search, which is suitable for automatic optimization of radiotherapy plans.

Description

technical field [0001] The invention relates to the field of radiotherapy plan optimization, in particular to a radiotherapy plan optimization system and method based on Monte Carlo tree search. Background technique [0002] Radiation therapy is a local treatment method that uses radiation to treat tumors, and is one of the mainstream tumor treatment methods at present. Radiation includes α, β, γ rays produced by radioactive isotopes and x-rays, electron beams, proton beams and other particle beams produced by various x-ray therapy machines or accelerators. Currently, about 70% of cancer patients require radiation therapy as part of their cancer treatment. [0003] The radiation therapy plan is a specific implementation plan for controlling the position of the tumor of the patient irradiated by the accelerator. It is formulated by the physicist using the Treatment Planning System (TPS) according to the prescription dose target specified by the radiation doctor. Its goal is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1031A61N2005/1034
Inventor 何铁军王伟董梅平刘杰
Owner 北京东方瑞云科技有限公司
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