Radioactive source inversion method based on multi-algorithm

Abstract

The invention discloses a method for inversing a radiation source, which is to measure a PDD curve by a water tank or other radiation dosimetry measuring equipment. Information of the high accuracy radiation source can be acquired by the method, including photon energy spectrum, or proton energy spectrum, or electron energy spectrum and photon pollution and other radiation information. The method has the advantages that: the information of the photon energy spectrum, the electron energy spectrum, the proton energy spectrum, photon pollution and other radiation source information of the radiation source can be simultaneously reestablished; the defect that the prior energy spectrum calculation method can not accurately acquire multiple radiation source information can be overcome; while the accurate energy spectrum of the radiation source is accurately acquired, the information of the photon pollution and other information can be acquired; correct information of the radiation source can be provided for dose calculation; information of scattered or continuous energy spectrum and the photon pollution can be acquired; and the accurate radiation source can be realized by a plurality of algorithms so as to solve the problem that the prior single algorithm can not ensure that the inverse of the energy spectrum has a solution.

Description

technical field

[0001] The invention belongs to the field of radioactive source inversion and reconstruction methods. Background technique

[0002] Source inversion is the source information that can be deduced from the dose information measured in vitro. The source inversion method guarantees to obtain correct radioactive source information—including electron energy spectrum, proton energy spectrum, photon energy spectrum, photon pollution and other information, which provides an important guarantee for accurately understanding the ray composition of radioactive sources.

[0003] Accurate radioactive source information is an important parameter to improve the accuracy of radiation dose calculation. Whether it is Monte Carlo simulation or analytical dose calculation, radioactive source information plays an important role. At present, there are three main ways to obtain radioactive source information, one is to simulate the source by Monte Carlo, but it needs to establish an...

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