dose rate estimation method and system based on a Monte Carlo voxel model

A dose rate and voxel technology, applied in calculation, 3D modeling, image analysis, etc., can solve the problems of not distinguishing between tissues and organs, insufficient estimation of radiation impact, and uncertainty of biological dose rate estimation

Pending Publication Date: 2019-03-26
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology

[0005] Using a uniform ellipsoid to represent the reference organism for dose rate estimation without distinguishing between tissues and organs not only ignores the difference between the ellipsoid and the actual body size of the organism, but also the density, element composition, nuclide distribution of sensitive organs and the distribution of organs in the body The dose rate effect due to the location of the site is also not considered, which will lead to uncertainty in the estimate of the dose rate of the organism and underestimation of the radiation effect

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  • dose rate estimation method and system based on a Monte Carlo voxel model

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Embodiment 1

[0099] Taking the dose rate estimation of carp as an example, a voxel model of carp is established to estimate the radiation dose rate of carp. Provide a fine model that is closer to the real situation and distinguishes various tissues and organs for the radiation impact assessment of carp. In order to achieve the above purpose, the following steps are included:

[0100] (1) Image set acquisition and registration

[0101] Place the organism on the relevant equipment, and scan according to the interval thickness of 1.25mm through nuclear magnetic resonance technology to obtain a collection of pictures of different sections of the organism. Use the 3D reconstruction system that comes with the scanning device to perform 3D reconstruction, and then separate the 2D images according to the sagittal, coronal, and axial positions on this basis. After 2D → 3D reconstruction → 2D conversion, registration is obtained The following two-dimensional image set.

[0102] (2) Image segmenta...

Embodiment 2

[0117] Taking the dose rate estimation of freshwater crabs as an example, a voxel model of freshwater crabs is established to estimate the radiation dose rate of freshwater crabs. Provide a fine model that is closer to the real situation and distinguishes various tissues and organs for the radiation impact assessment of freshwater crabs. In order to achieve the above purpose, the following steps are included:

[0118] (1) Image set acquisition and registration

[0119] Place the organism on the relevant equipment, and scan according to the interval thickness of 1.25mm through nuclear magnetic resonance technology to obtain a collection of pictures of different sections of the organism. Use the 3D reconstruction system that comes with the scanning device to perform 3D reconstruction, and then separate the 2D images according to the sagittal, coronal, and axial positions on this basis. After 2D → 3D reconstruction → 2D conversion, registration is obtained After the 2D image co...

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Abstract

The invention discloses a dose rate estimation method and system based on a Monte Carlo voxel model. The method comprises the following steps: S1, performing three-dimensional reconstruction and two-dimensional conversion on a picture set to obtain a registered picture set; S2, performing organ segmentation on pictures in the registered picture set; S3, performing three-dimensional reconstructionon the segmented image set, and performing three-dimensional perspective reconstruction on organs in the organism; S4, operating to obtain a section diagram and a 3D reconstruction diagram of the voxel model of the organism; S5, calculating to obtain internal and external irradiation dose rate conversion factors between the source and the target; And S6, substituting the calculated internal and external irradiation dose rate conversion factors into a dose rate calculation formula, and calculating to obtain the total dose rate of the organism. The method and the system provided by the inventioncan be used for establishing a voxel model of a living body, estimating the radiation dose rate of the living body and improving the certainty of the estimation value of the dose rate of the living body.

Description

technical field [0001] The invention relates to the technical field of dose rate estimation, in particular to a method and system for estimating dose rate based on a Monte Carlo voxel model. Background technique [0002] As society pays more attention to the protection of the ecological environment, the impact of ionizing radiation on non-human species (organisms other than humans) is also increasingly concerned. The International Atomic Energy Agency (IAEA), the United Nations Commission on Radiation Effects (UNSCEAR), and the International Commission on Radiological Protection (ICRP) have successively issued special publications to discuss and describe this issue. my country's "Radioactive Pollution Prevention Law" issued in 2003 and the "Nuclear Safety Law" implemented in 2018 have requirements for the protection of non-human species. [0003] International non-human species radiation dose and radiation effect assessment methods and models are: ERICA of the European Unio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/33G06T7/12G06T7/136G06T17/00
CPCG06T7/12G06T7/136G06T7/33G06T17/00G06T2207/30004G06T2207/10081G06T2207/10088
Inventor 李建国王慧娟马炳辉韩宝华曹少飞王学文张超
Owner CHINA INST FOR RADIATION PROTECTION
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