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Rapid Monte Carlo simulation method for simulating photon propagation

A simulation method, photon technology, applied in the field of optics, can solve the problems of time efficiency affecting simulation accuracy, calculation increase, etc., and achieve the effects of reducing time consumption, speeding up simulation speed, and good compatibility

Pending Publication Date: 2022-03-01
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to achieve higher simulation accuracy, a larger number of photons is usually required for simulation, which will result in exponential growth of computation
The time efficiency of Monte Carlo simulation has become the main limitation affecting its simulation accuracy. How to improve the simulation speed while ensuring the simulation accuracy has become a key technical bottleneck in the field of Monte Carlo simulation.

Method used

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  • Rapid Monte Carlo simulation method for simulating photon propagation
  • Rapid Monte Carlo simulation method for simulating photon propagation
  • Rapid Monte Carlo simulation method for simulating photon propagation

Examples

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Embodiment 1

[0017] In this example, a single-layer biological tissue model embedded with spherical tumors, such as figure 1 As shown, and simulate the absorption distribution diagram of photons in this biological tissue model. More specifically, all photons are vertically incident on the biological tissue model at the center of the X axis; for the surrounding tissue, the absorption coefficient μa, scattering coefficient μs, anisotropy factor g and refractive index n are set to 2cm -1 、100cm -1 , 0.8 and 1.4; the anisotropy factor g and refractive index n of the embedded tumor are the same as those of the surrounding tissue above, and its absorption coefficient is at 5cm -1 to 14cm -1 Change between, the step length is 3cm -1 , the scattering coefficient is at 100cm -1 to 400cm -1 Change between, the step length is 100cm -1 ; The position of the tumor changes along the X axis between 0.5mm and 0.8mm with a step size of 0.1mm, and along the Z axis between 0.2mm and 0.8mm with a step s...

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Abstract

The invention belongs to the field of optics, and discloses a rapid Monte Carlo simulation method for simulating photon propagation, which comprises the following steps of: training a database by using a photon propagation simulation result, and obtaining a reconstruction model by using a generative adversarial network from a rough photon propagation simulation result which only needs to input a small number of photons and consumes less time; and a fine photon propagation simulation result is reconstructed, so that the time consumption of simulation is greatly reduced on the premise of ensuring the precision of photon propagation simulation, and therefore, the method has important application value.

Description

technical field [0001] The invention belongs to the field of optics and relates to a fast Monte Carlo simulation method for simulating photon propagation. Background technique [0002] Monte Carlo simulation is a method based on repeated random sampling of physical quantities. It is often used to solve problems that are too complicated due to the intervention of random variables or cannot be solved by other mathematical models. Due to its high flexibility and accuracy, Monte Carlo simulation has become the most commonly used method for simulating photon propagation in complex structured media, especially for simulating photon propagation in biological tissues. During the Monte Carlo simulation process, the random propagation results of each photon will be recorded and averaged to obtain an estimated value, so Monte Carlo simulation can theoretically achieve any desired simulation accuracy. However, in order to achieve higher simulation accuracy, a larger number of photons i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25
CPCG06F30/25Y02T10/40
Inventor 陈硕宋云峰王世远
Owner NORTHEASTERN UNIV
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