Sampling method and radiotherapy plan optimization method, dose calculation method

A radiotherapy and planning technology, applied in the directions of radiotherapy, mechanical/radiation/invasive therapy, treatment, etc., can solve the problems of long calculation time and large memory space, so as to improve the calculation speed, improve the accuracy, improve the speed and Effectiveness

Active Publication Date: 2020-03-31
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Claims
  • Application Information

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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 and radiotherapy plan optimization method, dose calculation method
  • Sampling method and radiotherapy plan optimization method, dose calculation method
  • Sampling method and radiotherapy plan optimization method, dose calculation method

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

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

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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 invention relates to the field of radiotherapy, in particular to a cluster-based sampling method in radiotherapy planning. Background technique [0002] Radiation therapy is a method to treat malignant tumors by using radiation such as α, β, γ rays produced by radioactive isotopes and x-rays, electron beams, proton beams and other particle beams produced by various x-ray therapy machines or accelerators. [0003] Due to the high energy of the beam, normal cells are also affected while tumor cells are killed. Radiation therapy is planned in order to minimize damage to normal tissue. In radiotherapy planning, doctors need to give prescriptions and treatment plans, and physicists outline organs and tumor locations, as well as gross tumor volume (Gross TumorVolume, GTV), clinical target volume (Clinical Target volume, CTV) and plan according to the doctor’s prescription. Target areas such as the treatment volume (PlanningTarget Volume, PTV), formulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16H20/40G16H50/20A61N5/10
CPCA61N5/1031G16H50/20
Inventor 赵轲俊王伟远
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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