Method and device for compressing and uncompressing sources

Abstract

The invention provides a method for compressing and uncompressing sources. The method includes compressing particle information of the sources to generate compressed sources and storing the compressed sources; generating particles from the stored compressed sources. The method has the advantages that distribution parameters of the particles along radius directions are extracted, so that storage spaces for the sources can be greatly reduced, and the method brings convenience for Monte Carlo programs to read the sources; states of the particles in the sources can be completely reflected by the distribution parameters of the particles, so that the precision of the compressed sources can be improved; the distribution parameters of the particles can be adjusted, so that the sources can be adjusted, and commission with different treatment heads can be facilitated.

Description

technical field [0001] The present invention generally relates to the field of radiotherapy dose calculations, and more particularly to the compression and processing of sources in the calculation of dose distribution using the Monte Carlo method. Background technique [0002] At present, the Monte Carlo method is widely used in medical dose calculation and verification. Dose calculation using the Monte Carlo method, whose calculation accuracy is close to the real measured value, is generally considered the "gold standard" in dose calculation. Due to the long calculation time required by the Monte Carlo method, its application in clinical radiation therapy is hindered. With the development of computer hardware technology, especially the emergence of graphics processing unit (GPU), the calculation time required by the Monte Carlo method has been greatly shortened. [0003] figure 1 An example of the physical structure of a photon ray source is given in . From figure 1 It...

AI Technical Summary

Problems solved by technology

[0008] 1. The fan-shaped area is too large, such as taking 1 / 4 of the original source area, the compression accuracy can be improved, but the compression ratio is reduced, and the compression effect cannot be achieved

[0009] 2. If the fan-shaped area is too small, the compression ratio is guaranteed, but the compression accuracy is not enough

If you want to improve the compression accuracy, you need to increase the number of particles, and if you want to increase the compression ratio, you need to reduce the number of particles, so the compression accuracy and compression ratio cannot be improved at the same time

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