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Simulation design method and system for radiotherapy plan based on expansion contraction theory

A simulation design and planning technology, applied in the field of virtual surgery, can solve the problems of difficult to achieve dose distribution in radiotherapy planning and high dependence on the experience of physicists, and achieve the effect of alleviating the high dependence on experience, improving efficiency and improving efficiency.

Active Publication Date: 2021-08-27
BEIHANG UNIV
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  • Claims
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Problems solved by technology

This method relies heavily on the experience of physicists, and the obtained radiotherapy plan is difficult to achieve the optimal dose distribution

Method used

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  • Simulation design method and system for radiotherapy plan based on expansion contraction theory
  • Simulation design method and system for radiotherapy plan based on expansion contraction theory

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no. 1 example

[0020] figure 1 It is a schematic flowchart of a radiotherapy plan simulation design method based on expansion contraction theory in the first embodiment of the present invention, as shown in figure 1 As shown, the method includes the following four steps.

[0021] Step S11: Marking tumor targets in medical images. Specifically, the tumor target is marked in the medical image, the 3D image including the TV area and the OAR area of ​​the tumor target is established, and the 3D image is evenly sampled to obtain the target point cloud data.

[0022] It should be noted that the TV (Target Volume) treatment target area is the CTV (Clinical Target Volume) clinical target area, including confirmed tumors and potential invaded tissues, and the GTV (Gross Tumor Volume) tumor area and surrounding subclinical areas. The lesion constitutes the CTV, and the purpose of radiation therapy is to kill the tumor cells in the TV area. OAR (Organ At Risk) refers to the normal organs around the ...

no. 2 example

[0030] figure 2 It is a schematic structural diagram of a radiotherapy planning simulation design system based on the expansion contraction theory in an embodiment of the present invention, as shown in figure 2 As shown, the system includes: a computing device 100 and a 3D printing device 200 , and the computing device 100 includes an image processing module 101 , a plan generation module 102 and a plan optimization module 103 .

[0031] The image processing module 101 marks the tumor target in the medical image, establishes a 3D image including the TV area and the OAR area of ​​the tumor target, uniformly samples the 3D image, and acquires point cloud data of the target.

[0032] The plan generation module 102 is used to set a template containing the needle entry point for radiotherapy, any needle entry point and any point in the target point cloud data are combined into a needle track, and a needle track sequence P is randomly generated, and any two needle track sequences ...

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Abstract

The invention discloses a radiotherapy plan simulation design method and system based on expansion and contraction theory, including: marking tumor targets in medical images, establishing a three-dimensional image including the TV area and OAR area of ​​the tumor target, uniformly sampling the three-dimensional images, and obtaining the target Point cloud data; set a template containing the needle entry point for radiotherapy, randomly generate a needle track sequence P, set a number of radiation particles in the needle track in the sequence P, and calculate the dose distribution of a number of radiation particles; expand the residence point of the radiation particles Shrink operation, adjust the residence time of radiation particles to optimize the dose distribution of radiation particles; print the 3D model of the 3D image, the needle track sequence P and the residence point of radiation particles. Compared with the prior art, the solution proposed by the present invention alleviates the high dependence of the traditional radiotherapy plan on the experience of the physicist, uses the method based on the expansion and contraction theory to iteratively optimize the residence position of the radiation particles in the needle tract, and improves the treatment Effectiveness of planning.

Description

technical field [0001] The invention relates to the technical field of virtual surgery, in particular to a radiotherapy plan simulation design method and system based on expansion contraction theory. Background technique [0002] The role and status of radiotherapy in tumor treatment has become increasingly prominent, and it has become one of the main means of treating malignant tumors. According to statistics, about 70% of cancer patients need radiotherapy in the process of cancer treatment, and about 40% of cancers can be cured with radiotherapy. Tumor radiation therapy is the use of high-energy radiation to irradiate cancerous tumors to kill or destroy cancer cells and inhibit their growth, reproduction and spread. [0003] Radiation therapy can be divided into brachytherapy and external beam radiation according to the distance of the radiation source from the patient. The brachytherapy method is to implant radioactive particles into the tumor by means of interventional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/34
CPCA61N5/1031A61N5/1039
Inventor 刘博肖卓周付根
Owner BEIHANG UNIV
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