Reverse planning method for treatment plan and treatment plan system

Abstract

The invention discloses a reverse planning method for a treatment plan, which comprises the following steps of: A, setting an iteration optimizing parameter; B, generating individual treatment plans; C, calculating an individual treatment plan dose field; D, screening the individual treatment plans according to an individual treatment plan screening strategy; E, calculating and screening the fitness of the residual individual treatment plans according to the dose field and a reverse planning target; F, selecting the current optimum plan; G, if the evolution times is more than that of a population, conveying to the step I, otherwise, performing the next step; H, evolving the population to the population of new generation, and conveying to the step C; and I, stopping evolving the population and outputting the current optimum plan. The invention also discloses a treatment plan system. In the reverse planning method, the population plans are screened before the fitness is calculated and the fitness of the residual individual treatment plans which are screened is calculated, so the calculated amount can be reduced effectively, and the integral iteration process is efficient.

Description

technical field [0001] The invention relates to a radiotherapy planning technology, in particular to a radiotherapy planning reverse planning method and a treatment planning system. Background technique [0002] Stereotactic radiosurgery or stereotactic radiosurgery are two common radiotherapy techniques in radiotherapy, and the common devices are Gamma Knife based on cobalt-60 radiation source and X-Knife based on electron accelerator. The former usually uses multiple cobalt-60 radiation sources to focus on irradiation, so that the target body receives high-dose uniform irradiation while the surrounding healthy tissues receive low dose to achieve the purpose of controlling or eradicating lesions. Before radiation therapy can be administered with the Gamma Knife device, an acceptable radiation treatment plan usually needs to be developed. Gamma Knife treatment planning is usually done manually in an interactive and iterative manner. This is a forward planning process, that...

AI Technical Summary

Problems solved by technology

Due to the limited size of collimators available for Gamma Knife, treatment planning usually requires multiple targets to be irradiated, so many parameters need to be adjusted, especially when the target volume is large and irregular, or the target is close When there is a healthy organization, this is a very time-consuming process while demanding the experience and skills of the plan designer

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