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Photon and electron dose calculating method under magnetic field based on GPU Monte Carlo algorithm

A computational method and electronic technology, applied in the field of medical radiation therapy, which can solve the problems of increased steps, increased calculation time, and inability to obtain fast and accurate dose results.

Active Publication Date: 2017-07-14
安徽慧软科技有限公司
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Problems solved by technology

The result of this is: if some of the 32 threads need to update the same global memory, there will be fierce thread competition, the steps required for the "compare-exchange" algorithm will increase sharply, and the operation time will increase significantly
Therefore, combining a GPU with a Monte Carlo program, without solving this problem, even a special-purpose Monte Carlo program simulation, cannot achieve fast and accurate dosing results

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  • Photon and electron dose calculating method under magnetic field based on GPU Monte Carlo algorithm
  • Photon and electron dose calculating method under magnetic field based on GPU Monte Carlo algorithm
  • Photon and electron dose calculating method under magnetic field based on GPU Monte Carlo algorithm

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Embodiment Construction

[0044] In this embodiment, a method for calculating the dose of photons and electrons under a magnetic field based on the GPU Monte Carlo algorithm is applied in the field of MRIgRT, that is, in the MRI magnetic field environment, the radioactive source passes through complex interactions with the human body model. Energy is deposited in the experimental environment in various organs of the human body model, specifically, as figure 1 As shown, proceed as follows:

[0045] Step 1: Collect data

[0046] Step 1.1. Obtain and process the radiation source data of the radiation therapy accelerator to obtain radiation source information where E represents the source energy, represents the source location, Indicates the source emission direction;

[0047] Step 1.2, obtain the image data of the human anatomy structure of the CT machine or the nuclear magnetic resonance instrument MRI or the positron emission type computed tomography imaging machine PET and reconstruct the human ...

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Abstract

The present invention discloses a photon and electron dose calculating method under a magnetic field based on a GPU Monte Carlo algorithm. The method comprises: 1, collecting data; 2, determining the optimal thread count and transport task batches of a GPU; 3, employing the Monte Carlo algorithm to calculate the photon and electron dose of each batch under the magnetic field effect; and 4, performing statistics of the dose results based on the GPU rapid atom addition. The photon and electron dose calculating method under the magnetic field based on the GPU Monte Carlo algorithm can rapidly and accurately calculate the photon and electron radiation dose under the magnetic field effect and can be used for magnetic resonance to guide the dose calculation in the radiotherapy in real time so as to improve the accuracy and the speed of the dose calculation in the radiotherapy and improve the effect of radiation treatment.

Description

technical field [0001] The invention belongs to the application of computer information technology in the field of nuclear technology, in particular to the field of medical radiotherapy technology, specifically a method for calculating the dose of photons and electrons under a magnetic field based on GPU Monte Carlo algorithm, which can be used for real-time guidance of magnetic resonance Dose calculation in a treatment planning system for radiation therapy MRIgRT. Background technique [0002] Cancer is one of the main causes of human death. About 70% of cancer patients need radiation therapy during the treatment of cancer, and about 40% of cancers can be cured with radiation therapy. The radiation therapy regimens that actual patients receive are designed through the treatment planning system. In the treatment planning system, the doctor will draw the outline of the target organ and the organ at risk according to the patient's CT, and set the prescribed dose of the target...

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1071A61N2005/1034A61N2005/1052A61N2005/1055A61N2005/1092
Inventor 徐榭阳露刘紅冬刘天宇林卉裴曦
Owner 安徽慧软科技有限公司
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