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Proton and heavy ion dose calculation method under magnetic field based on GPU Monte-Carlo method

A calculation method, heavy ion technology, applied in radiation therapy, X-ray/γ-ray/particle irradiation therapy, treatment, etc., which can solve the problems of increased steps, inability to quickly and accurately calculate dose results, and increased computing time.

Active Publication Date: 2017-08-18
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

Method used

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  • Proton and heavy ion dose calculation method under magnetic field based on GPU Monte-Carlo method
  • Proton and heavy ion dose calculation method under magnetic field based on GPU Monte-Carlo method
  • Proton and heavy ion dose calculation method under magnetic field based on GPU Monte-Carlo method

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Embodiment Construction

[0058] In this embodiment, a method for calculating proton and heavy ion dose under a magnetic field based on the GPU Monte Carlo algorithm is applied to 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, The energy is deposited in the experimental environment of the specific location of the human body model, specifically, such as figure 1 As shown, proceed as follows:

[0059] Step 1: Collect data;

[0060] Step 1.1. Obtain the beam source information of the radiotherapy proton or heavy ion accelerator 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 anatomical structure of the CT machine or the MRI or positron emission computed tomography machine PET and reconstruct the human body model; obtain the magnetic field...

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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 present invention belongs to the application of computer information technology in the field of nuclear technology, relates to tumor radiotherapy technology, and specifically is a calculation method of proton and heavy ion dose under a magnetic field based on GPU Monte Carlo algorithm, which can be used for traditional and magnetic resonance real-time guided proton and heavy ion Dose calculation for ion radiotherapy planning system. Background technique [0002] The purpose of radiotherapy is to maximize the destruction of tumors while protecting surrounding organs at risk. In order to achieve this goal, it can be considered from two aspects: imaging technology and selection of appropriate radiation source types. [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 for soft tissue imaging is not high, ...

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Application Information

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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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