Dose calculation method for non-uniform grid distribution simulation linear accelerator treatment plan

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, uneven planning dose calculation method, low beam flux accuracy, etc. problem, to achieve the effect of improving the accuracy of dose calculation

Active Publication Date: 2020-03-13
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 non-uniform grid distribution simulation linear accelerator treatment plan
  • Dose calculation method for non-uniform grid distribution simulation linear accelerator treatment plan
  • Dose calculation method for non-uniform grid distribution simulation linear accelerator treatment plan

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Embodiment Construction

[0041] Below in conjunction with embodiment and accompanying drawing, further illustrate the present invention.

[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-dimensiona...

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Abstract

The invention belongs to the field of radiotherapy dose calculation, which relates to a dose calculation method for non-uniform grid distribution simulation linear accelerator treatment plan and a device thereof, and a storage medium. The method comprises the following steps: setting non-uniform grid parameters and initial flux values of corresponding grids; calculating the contribution of each grid to the total dose distribution, and superposing to obtain the dose of the whole radiation field in the selected die body; comparing the difference between the real dose and the dose calculation; ifthe difference is within a preset calculation precision range, receiving a current grid segmentation parameter and a flux value for dose calculation of a patient treatment plan; and if the differenceexceeds the preset calculation precision range, finely adjusting the separation of the grid in the y direction and the flux value corresponding to each grid, and then carrying out dose calculation until the calculation result meets the preset precision. According to the method, the radiation dose is calculated through the non-uniform two-dimensional flux grid, the resolution of the grid does notneed to be adjusted, the dose value of each grid can be directly calculated according to mechanical parameters, and the number of the 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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IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1045A61N5/1071A61N2005/1034
Inventor 唐寅
Owner BEIJING LINKING MEDICAL TECH CO LTD
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