An optimal dose-guided TPS automatic iterative optimization method

An iterative optimization and dosage technology, applied in the medical field, can solve problems such as time-consuming and labor-intensive

Active Publication Date: 2021-05-11
SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This process reference figure 1 , which is especially cumbersome for complex cases, and may require the planner to iterate many times manually, which is time-consuming and labor-intensive

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  • An optimal dose-guided TPS automatic iterative optimization method
  • An optimal dose-guided TPS automatic iterative optimization method
  • An optimal dose-guided TPS automatic iterative optimization method

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Embodiment Construction

[0069] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0070] In order to achieve the purpose of the present invention, in some embodiments of an optimal dose-guided TPS automatic iterative optimization method,

[0071] The traditional two-step IMRT (Intensity modulated radiation therapy) planning process generally includes two steps: field intensity map optimization and irradiation implementation. The optimized dose distribution of the field intensity map is an ideal dose distribution. If grating is used for treatment, the optimized field intensity map needs to be divided into subfields to obtain a series of subfields. Due to the characteristics and physical limitations of the grating, such as the maximum speed of the grating movement, the parameters of the grating penumbra, etc., there is a certain difference between the dose distribution of the actual irradiation and the optimized distribution...

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Abstract

The invention discloses a TPS automatic iterative optimization method guided by optimized dose, which includes the following content: first, calculate the difference between the dose of each point in each organ and the optimization result according to the divided dose, and use it as the input of the optimization engine to obtain the difference part The contribution of the intensity map; then, subtract the intensity map of the difference part from the original optimized intensity map, and use it as the input of the intensity map of the sub-field segmentation to obtain the iterated sub-field and calculate the dose; finally, repeat the whole process to make the final The dose distribution is close to the optimized dose, and the expected dose distribution is obtained. By applying the present invention, the subfield segmentation step is considered in the whole optimization process, and the dose deviation generated by subfield segmentation is continuously corrected, which can significantly improve the planning quality and speed up the planning production efficiency.

Description

technical field [0001] The invention belongs to the field of medical technology, and mainly relates to an optimization method of inverse intensity-modulated radiotherapy, in particular to a TPS automatic iterative optimization method guided by optimized dose. Background technique [0002] Intensity-modulated radiation therapy (IMRT), as a type of radiotherapy, adjusts the beam intensity according to the three-dimensional shape of the target area and the anatomical relationship between the organs at risk and the target area, so that the distribution of radiation dose is consistent with the shape of the target area, and the radiation dose received in the target area is consistent with the target area. The uniformly distributed high dose ensures the killing of tumor cells, and at the same time enables normal tissues to receive a lower dose of irradiation, so as to protect normal organs and reduce adverse reactions. [0003] The traditional IMRT planning process generally includ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1002A61N5/1031A61N5/1049A61N5/1071A61N2005/1054
Inventor 文虎儿鞠垚姚毅
Owner SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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