Calculation Method of Proton and Heavy Ion Dose Under Magnetic Field Based on GPU Monte Carlo Algorithm

A technology of heavy ions and protons, applied in radiation therapy, X-ray/γ-ray/particle irradiation therapy, treatment, etc., can solve problems such as increased computing time, inability to quickly and accurately calculate dose results, and increased steps

Active Publication Date: 2019-05-28
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, if the combination of GPU and Monte Carlo program does not solve this series of problems, it will not be possible to quickly and accurately calculate the dose results

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  • Calculation Method of Proton and Heavy Ion Dose Under Magnetic Field Based on GPU Monte Carlo Algorithm
  • Calculation Method of Proton and Heavy Ion Dose Under Magnetic Field Based on GPU Monte Carlo Algorithm
  • Calculation Method of Proton and Heavy Ion Dose Under Magnetic Field Based on GPU Monte Carlo Algorithm

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Embodiment Construction

[0058] In this embodiment, a method for calculating proton and heavy ion doses under a magnetic field based on the GPU Monte Carlo algorithm is applied in the field of proton and heavy ion radiotherapy, that is, the interaction between the proton beam and the heavy ion beam and the human body model, An experimental environment in which energy is deposited at specific locations on a mannequin, specifically, as figure 1 As shown, proceed as follows:

[0059] Step 1: collect data;

[0060] Step 1.1. Obtain beam source information of radiotherapy proton or heavy ion accelerators where E represents the source energy, represents the source location, Indicates the source emission direction, σ is the standard deviation of the Gaussian distribution;

[0061] 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 huma...

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Abstract

The invention discloses a proton and heavy ion dose calculation method under a magnetic field based on a GPU Monte-Carlo method. The method comprises the following steps: 1) collecting data; 2) determining an optimal thread count and transport task batches of a GPU; 3) calculating proton and heavy ion radiation dose of each batch under the magnetic field by utilizing the Monte-Carlo method; 4) calculating radiation dose of secondary particles of each batch under the magnetic field by utilizing the Monte-Carlo method; and 5) summarizing dose results based on a GPU fast atom addition method. The method can quickly and accurately calculate the proton and heavy ion radiation dose under the action of the magnetic field, and can be used for dose calculation of an MRI real-time guided proton and heavy ion treatment planning system, thereby improving accuracy and speed of dose calculation in the treatment planning system, and improving radiation treatment effect.

Description

technical field [0001] The invention belongs to the application of computer information technology in the field of nuclear technology, and relates to tumor radiotherapy technology, specifically a method for calculating the dose of protons and heavy ions in a magnetic field based on the GPU Monte Carlo algorithm, which can be used for traditional and magnetic resonance real-time guidance of protons and heavy ions. Dose Calculation for Ion Radiation Therapy Planning Systems. Background technique [0002] The purpose of radiation therapy is to kill the tumor to the greatest extent while protecting the surrounding organs at risk. In order to achieve this goal, it can be considered from two aspects of imaging technology and selection of suitable radiation source type. [0003] On the one hand, doctors need to use imaging technology to clearly locate the tumor and surrounding organs at risk. At present, CT is mostly used to determine the position, but the resolution of CT imagin...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1031A61N2005/1034A61N2005/1055A61N2005/1087
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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