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Treatment Planning System

A technology for treatment planning and radiation therapy, applied in computing, special data processing applications, instruments, etc., can solve the problems of high experience and skill requirements, time-consuming, and limited collimator size of planners, so as to improve optimization efficiency, increase Adaptability, the effect of accelerating evolutionary efficiency

Active Publication Date: 2017-04-26
SHEN ZHEN HYPER TECH SHENZHEN
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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

Method used

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Embodiment approach

[0076] One embodiment, wherein step 104 further includes: expanding the volume of the target body outward to a preset first range Ex1 to form a first expansion area V of the target body ex1 ; Set the target volume in the first expansion zone V ex1 Expand the preset second range Ex2 outward to form the second expansion area V of the target body ex2 ,Such as figure 2 shown.

[0077] In one embodiment, for a single healthy tissue / organ-at-risk, the reverse planning goal includes: prescription dose D p , healthy tissue / organ-at-risk limiting dose D m ; its fitness can be calculated by the following formula:

[0078]

[0079] Among them, k is the evolution algebra; a, b, c are weight factors, and a+b+c=1.0; V t is the dose value in the target body is less than D p volume, V s Is the dose value in healthy tissue / organ at risk greater than D m volume, V p is the dose value in the target body greater than D p volume, V total is the target body, the first extension regio...

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Abstract

The invention discloses a method for reversely planning a treatment plan. The method comprises the following steps of: A, inputting a medical image of a patient; B, drawing the tissue profiles of the body surface of the patient, a target body and organs at risks; C, setting a reserve planning target; D, establishing an initial treatment plan; E, setting an iterative optimization parameter; F, generating an individual treatment plan; G, computing an individual treatment plan dose field; H, computing the degree of adaptability; I, selecting a current optimal plan; J, if evolution times are greater than population evolution times, turning to a step M, or otherwise turning to a next step; K, evolving a population to a new generation of population and turning to the step G; and M, stopping population evolution and outputting a current optimal plan. The invention also discloses a treatment plan system. A method for computing the degree of adaptability is used for selecting an optimal plan, so that the evolution efficiency of the population can be increased, and an optimizing 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 卿侯刘启平崔智
Owner SHEN ZHEN HYPER TECH SHENZHEN
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