A fast extraction method for photon distribution in medium under point-matrix light source

An extraction method and medium technology, applied in the field of tissue optics, can solve problems such as low efficiency and large amount of calculation, and achieve the effects of simplifying the simulation process, shortening the simulation time, and improving the simulation efficiency

Active Publication Date: 2021-12-07
TIANJIN UNIV
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Problems solved by technology

However, due to its huge amount of calculation, it is generally only used for model verification and seldom used for direct calculation. When it is applied to point matrix light source simulation, the efficiency is very low

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  • A fast extraction method for photon distribution in medium under point-matrix light source
  • A fast extraction method for photon distribution in medium under point-matrix light source
  • A fast extraction method for photon distribution in medium under point-matrix light source

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation.

[0022] The general tissue can be regarded as a semi-infinite shift medium, that is, the photons will not overflow from the front after entering the tissue, and the distribution of photons will be affected by the position of the light source. Using this characteristic, the present invention proposes a method based on The method of MC simulation under point light source to quickly obtain the distribution of photons in tissue under point light source can quickly and accurately determine the photon distribution characteristics of semi-infinitely variable tissue under point light source.

[0023] The commonly used shift model and the semi-infinite shift model are established on the Matlab platform, and the model volumes are respectively set as: 30mm×30mm×10mm and 60mm×60mm×35mm. The selected background optical parameters are based on th...

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Abstract

The invention belongs to the field of tissue optics, and relates to a rapid extraction method for photon distribution in a medium under a dot matrix light source, comprising the following steps: establishing a commonly used shift-variable medium model and a semi-infinite shift-variable medium model. The Monte Carlo MC simulation program is used to simulate the distribution of photons in the semi-infinite model under the point light source, and this is used as the original calculation basis and translation database. Estimate the distribution of photons in the variable medium model under the dot matrix light source, and realize the rapid extraction of the photon distribution characteristics in the model under the dot matrix light source. The invention saves the time length of Monte Carlo simulation and improves the simulation efficiency.

Description

technical field [0001] The invention belongs to the field of tissue optics, and relates to an accurate and fast extraction method for the distribution characteristics of photons propagating in a semi-infinitely variable medium under complex lattice light sources. Background technique [0002] In the field of tissue optics, the development of accurate and rapid quantitative methods for photon distribution characteristics in arbitrary tissues is the key to understanding the interaction between light and biological tissues and extracting useful physiological characteristics of biological tissues. The absorption of photons by absorbing groups in tissues will convert energy and cause a series of biological effects, and also cause photon re-emission. These processes provide a reliable basis for providing tissue structure information. In recent years, they have received increasing attention in the fields of optical imaging and other fields. . [0003] In recent years, dot matrix l...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16H50/50A61B5/00
CPCA61B5/0059
Inventor 赵会娟赵宽心闫盼盼李同心
Owner TIANJIN UNIV
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