Dose Calculation Method for Linear Accelerator Treatment Planning Simulated by Inhomogeneous Grid Distribution

A linear accelerator, uniform grid technology, used in X-ray/γ-ray/particle irradiation therapy, therapy, radiotherapy, etc., can solve the problem of long calculation time, low beam flux accuracy, uneven planning dose calculation method, etc problem, to achieve the effect of improving the accuracy of dose calculation

Active Publication Date: 2021-02-19
BEIJING LINKING MEDICAL TECH CO LTD
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Problems solved by technology

[0005] In order to solve the problems of low precision and long calculation time of the beam flux formed by the tungsten gate and multi-leaf collimator in the above-mentioned equidistant two-dimensional grid calculation simulation, this technical solution provides a non-uniform grid distribution simulation linear accelerator treatment Plan dose calculation method, device and storage medium

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  • Dose Calculation Method for Linear Accelerator Treatment Planning Simulated by Inhomogeneous Grid Distribution
  • Dose Calculation Method for Linear Accelerator Treatment Planning Simulated by Inhomogeneous Grid Distribution
  • Dose Calculation Method for Linear Accelerator Treatment Planning Simulated by Inhomogeneous Grid Distribution

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Embodiment Construction

[0041] The present invention is further described below in conjunction with embodiment and accompanying drawing.

[0042] A treatment plan dose calculation method for simulating a linear accelerator with uneven grid distribution, comprising the following steps (the process is as follows: figure 1 shown):

[0043] (1) Setting the uneven grid parameter 310 specifically includes the following steps:

[0044] (i) setting the boundary 311 of the two-dimensional flux grid for dose calculation;

[0045] In an exemplary embodiment of the present invention, the boundary of the two-dimensional flux grid for dose calculation is determined by the maximum outer contour formed by the movement of the tungsten gate in each treatment plan, that is, the maximum outer contour formed by the movement of the tungsten gate in the treatment plan is the boundary of the two-dimensional flux grid for dose calculation.

[0046](ii) Preliminarily divide the initial grid spacing 312 of the two-dimension...

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Abstract

The invention belongs to the field of radiotherapy dose calculation, and relates to a treatment plan dose calculation method, equipment and storage medium for simulating linear accelerator with uneven grid distribution. The method includes the following steps: setting the parameters of the uneven grid and the initial flux value of the corresponding grid; calculating the contribution of each grid to the total dose distribution, and obtaining the dose of the entire radiation field in the selected phantom after superposition; Compare the difference between the real dose and the dose calculation; if the difference is within the preset calculation accuracy range, accept the current grid segmentation parameters and flux values ​​for the dose calculation of the patient's treatment plan; if the difference exceeds the preset calculation accuracy range , after fine-tuning the separation in the y-direction of the grid and the flux value corresponding to each grid, perform dose calculation until the calculation result meets the preset accuracy. The invention calculates the radiation dose through the non-uniform two-dimensional flux grid without adjusting the resolution of the grid, and can directly calculate the dose value of each grid according to the mechanical parameters, so that the number of grids is controllable.

Description

technical field [0001] The invention belongs to the field of radiotherapy dose calculation, and relates to a treatment plan dose calculation method, equipment and storage medium for a non-uniform grid distribution simulation linear accelerator. Background technique [0002] In the existing methods of using linear accelerators to treat cancer, TPS is generally used to formulate a treatment plan for each patient's tumor area. The quality of the plan is affected by many factors, such as the level of physicist planning, TPS The performance of the optimization algorithm, whether the dose calculation can be accurately simulated, and many other factors. Among them, the dose calculation accuracy directly affects the iterative direction of the optimization algorithm and the judgment of the physicist, and becomes the basic index to measure the quality of a TPS. [0003] Since the purpose of dose calculation is to simulate the dose deposition distribution of the linear accelerator tre...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1045A61N5/1071A61N2005/1034
Inventor 唐寅
Owner BEIJING LINKING MEDICAL TECH CO LTD
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