A method for fast optimization of intensity modulated subfields by grouping
An intensity-modulated, subfield technology, applied in X-ray/γ-ray/particle irradiation therapy, special data processing applications, various digital computer combinations, etc., can solve problems such as long time, reduce the number, reduce optimization time, The effect of reducing waste
Active Publication Date: 2017-09-26
成都奇林科技有限责任公司
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[0004] The purpose of the present invention is to provide a method for quickly optimizing the intensity modulated subfield by grouping, which solves the problem that optimization in the prior art requires multiple iterations and takes a long time
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[0030] Such as 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 g...
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The invention discloses a method for quickly optimizing the intensity-modulated subfield by using grouping, which solves the problem that optimization in the prior art requires multiple iterations and takes a long time. The present invention includes the following steps: (1) according to the three-dimensional shape of the target area and the anatomical relationship between related organs at risk, determine the leaves required to form the radiation field, and then group the leaves used to form the radiation field; (2) The simulated annealing method is used to judge the leaves of each group separately. In the present invention, the blades are grouped before the simulated annealing, and then each group is optimized with a CPU core; each group is judged by an independent objective function, the position of the leaves in the group is changed, and the objective function is calculated. According to the acceptance rule of the solution, it is judged whether the blade change can be accepted. Therefore, the optimization time is reduced on the basis of reducing the number of subfields and the number of machine jumps and improving the implementation efficiency; at the same time, the computing power of the multi-core CPU is used to reduce waste.
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...
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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