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Radiotherapy plan simulation design method and system based on expansion and contraction theory

A technology for planning and emitting particles, applied in the field of virtual surgery, it 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 relieving the high dependence on experience, improving efficiency and improving efficiency.

Active Publication Date: 2021-03-19
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Radiotherapy plan simulation design method and system based on expansion and contraction theory
  • Radiotherapy plan simulation design method and system based on expansion and contraction theory

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no. 1 example

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

[0021] Step S11: Mark the tumor target in the medical image. Specifically, the tumor target is marked in the medical image, a 3D image including the TV area and the OAR area of ​​the tumor target is established, the 3D image is uniformly sampled, and the target point cloud data is obtained.

[0022] It should be noted that the target volume of TV (Target Volume) treatment is the clinical target volume of CTV (Clinical Target Volume), including the established tumor and potential invading tissue, GTV (Gross Tumor Volume) tumor area and surrounding subclinical areas. The lesions constitute CTV, and the purpose of radiation therapy is to kill tumor cells in the TV area. OAR (Organ At Risk)...

no. 2 example

[0030] figure 2 It is a schematic structural diagram of a radiotherapy plan simulation design system based on expansion and contraction theory according to an embodiment of the present invention, such as figure 2 As shown, the system includes: a computing device 100 and a 3D printing device 200 . 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 three-dimensional image including the TV area and the OAR area of ​​the tumor target, uniformly samples the three-dimensional image, and obtains target point cloud data.

[0032] The plan generation module 102 is configured to set up a template including a needle entry point for radiotherapy, and any needle entry point is combined with any point in the target point cloud data to form a needle track, and a needle track sequence P is randomly generated, wh...

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Abstract

The invention discloses a radiotherapy plan simulation design method and system based on an expansion and contraction theory. The method comprises the steps of marking a tumor target in a medical image, building a three-dimensional image comprising a tumor target TV region and an OAR region, carrying out the uniform sampling of the three-dimensional image, and obtaining target point cloud data; setting a template containing a radiotherapy needle insertion point, randomly generating a needle passage sequence P, setting a plurality of radioactive particles in a needle passage in the sequence P,and calculating dose distribution of the multiple radioactive particles; carrying out expansion and contraction operation on residence points of the radioactive particles, and adjusting the residencetime of the radioactive particles so as to optimize the dose distribution of the radioactive particles; and printing a three-dimensional model of the three-dimensional image, the needle channel sequence P and the resident points of the radioactive particles. Compared with the prior art, the scheme relieves the high dependence of a traditional radiotherapy plan on physician experience, iterativelyoptimizes the residence positions of the radioactive particles in the needle passage by utilizing the method based on the expansion and contraction theory, and improves the efficiency of making a treatment plan.

Description

technical field [0001] The invention relates to the technical field of virtual surgery, in particular to a simulation design method and system of a radiotherapy plan based on expansion and 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 radiation therapy in the process of cancer treatment, and about 40% of cancers can be cured with radiation therapy. 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 between the radiation source and the patient. Brachytherapy is to implant radioactive particles into the tumor through an int...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1039
Inventor 刘博肖卓周付根
Owner BEIHANG UNIV