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Sampling method, radiotherapy plan optimization method and dosage calculating method

A radiation therapy and planning technology, applied in the field of radiation therapy, can solve the problems of large memory space and long calculation time, and achieve the effect of increasing calculation speed, improving accuracy and reducing calculation amount

Active Publication Date: 2017-05-17
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

CT images usually have high resolution and a large number of pixels. If all the pixels participate in the optimization of radiotherapy planning and dose calculation, the calculation time will be too long and the memory space will be too large.

Method used

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  • Sampling method, radiotherapy plan optimization method and dosage calculating method
  • Sampling method, radiotherapy plan optimization method and dosage calculating method
  • Sampling method, radiotherapy plan optimization method and dosage calculating method

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0026] In radiotherapy, high-dose radiation is required to be delivered to the tumor target area as much as possible to minimize damage to various organs. Therefore, it is necessary to optimize the radiation treatment plan and calculate the dose distribution in the patient corresponding to the radiation treatment plan. Both the optimization of the radiotherapy plan and the dose distribution are calculated based on the sampling points, so...

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Abstract

The invention relates to the field of radiotherapy and provides an image sampling method used in radiotherapy plan optimization. The sampling method comprises the steps that an image to be obtained is obtained, wherein the image to be obtained includes at least one interested area, the upper limit of the total number of sampling points and the number of sampling points included in subareas in the interested area are obtained, the interested area is divided into multiple subareas according to the upper limit of the total number of the sampling points and the number of the sampling points included in subareas in the interested area, a clustering analysis algorithm is utilized to conduct downsampling on the subareas to obtain the sampling points in the interested area. The sampling method can retain shape characteristics of organs or target section while decreasing the number of the sampling points and is conductive to improvement of radiotherapy plan effectiveness and accuracy of dosage distribution calculation.

Description

Technical field [0001] The present invention relates to the field of radiotherapy, in particular to a sampling method based on clustering in radiotherapy planning. Background technique [0002] Radiotherapy is a method of treating malignant tumors by using radiation such as alpha, beta, and gamma rays produced by radioisotopes and x-rays, electron rays, proton beams and other particle beams produced by various x-ray treatment machines or accelerators. [0003] Due to the high beam energy, normal cells are also affected while tumor cells are killed. In order to reduce the damage to normal tissues as much as possible, a radiotherapy plan is needed. In the radiotherapy plan, the doctor needs to give a prescription and a treatment plan. The physicist outlines the organ and tumor location, as well as the total tumor volume (Gross Tumor Volume, GTV), clinical target volume (Clinical Target volume, CTV) and plan based on the doctor’s prescription. The treatment volume (Planning Target V...

Claims

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Application Information

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IPC IPC(8): G06F19/00A61N5/10
CPCA61N5/1031G16H50/20
Inventor 赵轲俊王伟远
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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