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Treatment planning reverse planning method and treatment planning system

A technology of treatment planning and planning, which is applied in the direction of X-ray/γ-ray/particle irradiation therapy, etc., can solve the problems of high experience and skill requirements of plan designers, limited collimator size, time-consuming and other problems, so as to reduce the amount of calculation and improve Optimized efficiency, the effect of accelerating evolutionary efficiency

Active Publication Date: 2016-06-01
SHEN ZHEN HYPER TECH SHENZHEN
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  • Application Information

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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  • Treatment planning reverse planning method and treatment planning system
  • Treatment planning reverse planning method and treatment planning system
  • Treatment planning reverse planning method and treatment planning system

Examples

Experimental program
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Effect test

Embodiment approach

[0077] 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.

[0078] 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:

[0079] f ( k ) = a V t + bV s + c V total V p V 0

[0080] ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
Inventor 卿侯刘启平崔智
Owner SHEN ZHEN HYPER TECH SHENZHEN
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