Method for quickly optimizing intensity-modulated sub-fields through grouping

A technology of intensity modulation and sub-field, applied in X-ray/γ-ray/particle irradiation therapy, special data processing application, combination of various digital computers, etc., can solve the problem of long time and reduce the number and number of machine jumps , the effect of reducing waste

Active Publication Date: 2015-01-07
成都奇林科技有限责任公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for quickly optimizing the intensity modulated subfield

Method used

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  • Method for quickly optimizing intensity-modulated sub-fields through grouping
  • Method for quickly optimizing intensity-modulated sub-fields through grouping
  • Method for quickly optimizing intensity-modulated sub-fields through grouping

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Embodiment

[0030] like image 3 As shown, a method for quickly optimizing the intensity-modulated subfield by grouping is implemented as follows:

[0031] According to the direction of the irradiation field, the three-dimensional shape of the target area and the anatomical relationship between the relevant organs at risk, determine the leaves required to form the radiation field, and then group the leaves used to form the radiation field, and the leaves outside the radiation field will not be considered, for example figure 1 , figure 1 The leaves that form the shoot field are numbered from 5 to 24. Each group uses a CPU core for optimization calculation, and each group uses an independent objective function to judge, change the position of the leaves in the group, calculate the objective function, and judge whether the change of leaves can be accepted according to the acceptance rule of the solution , specifically, the simulated annealing method is used to judge the blades of each grou...

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Abstract

The invention discloses a method for quickly optimizing intensity-modulated sub-fields through grouping. The method for quickly optimizing intensity-modulated sub-fields through grouping solves the problems that the prior art needs multiple iterations, and the time is long. The method for quickly optimizing intensity-modulated sub-fields through grouping includes steps that (1) determining a blade needed for forming a field according to the anatomic relationship between the three-dimensional shape of a target region and the related organ at risk, and grouping the blade for forming the field; (2) using a simulated annealing method to judge the blade of each group. The method for quickly optimizing intensity-modulated sub-fields through grouping includes that grouping the blade before performing the simulated annealing, and using a CPU core to carry out optimal computation on each group; judging each sub-group through an independent target function, changing the blade position in the sub-group, calculating the target function, and judging whether the blade change can be accepted according to a solution accepting method. The method for quickly optimizing intensity-modulated sub-fields through grouping reduces the optimizing time based on reducing the sub-field number and monitor unit number and improving the implementation efficiency; the waste is lowered by means of the computation ability of the multi-core CPU.

Description

technical field [0001] The invention relates to a method for quickly optimizing the intensity modulated subfield by grouping. Background technique [0002] The ideal dose distribution is achieved by adjusting the beam intensity distribution, which is called intensity modulated technology. Intensity modulated technology is the most important development direction of contemporary radiotherapy technology and the core of radiotherapy technology, which can effectively improve the cure rate of tumors and improve the quality of life of patients. At present, there are mainly the following methods of intensity modulation: MLC static intensity modulation, MLC dynamic intensity modulation, arc intensity modulation, and step-by-step fault intensity modulation. MLC static intensity modulation methods mainly include step-by-step reverse optimization method and direct field optimization (DAO). In the case of the same plan quality, the direct subfield optimization method can significantly...

Claims

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Application Information

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IPC IPC(8): G06F19/00G06F15/16G06F9/46A61N5/10
Inventor 勾成俊吴章文付凤强
Owner 成都奇林科技有限责任公司
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