Treatment plan reverse planning method and treatment plan system

Abstract

The invention discloses a treatment plan reverse planning method including the steps: A. inputting the medical image of a patient; B. drawing the outlines of the body surface of the patient, a target body and the tissue outline of an organ at risk; C. setting a reverse planning goal; D. creating an initial treatment plan; E. setting iterative optimization parameters; F. generating individual treatment plans; G. calculating the dose field of the individual treatment plans; H. screening individual plans; I. selecting current optimal plan according to the dose field; J. if the current optimal plan reaches the reverse programming goal, turning to M, and if not, turning the next stop; K. if the number of evolution times is larger than that of population evolution times, turning to M, and if not, turning to the next stop; L. allowing the remaining individual treatment plan of population to evolve to the new generation of population, and turning to G; and M. stopping the population evolution and outputting the current optimal plan. The invention also discloses a treatment plan system. By screening the population plan and iterating the remaining individual treatment plans, the whole iteration process is more 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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