Dose distribution determination method and device

Abstract

The invention discloses a dose distribution determination method and a dose distribution determination device. The method comprises the following steps: establishing a target geometric model; determining a first area in the target geometric model, and acquiring the dose distribution of the first area on the basis of a Monte Carlo transport simulation method; acquiring the dose distribution of a second area of the target geometric model according to a second method, wherein the second area is an area, except the first area, in the target geometric model; determining the dose distribution of the target geometric model in a radiotherapy process according to the dose distribution of the first area and the dose distribution of the second area. According to the method, the high-precision Monte Carlo transport simulation method is adopted for acquiring the dose distribution of the first area, and a rapid dose distribution method in the prior art is adopted for acquiring the dose distribution of the second area, so that the accuracy of the dose distribution of the first area is effectively improved; meanwhile, the acquisition speed of the dose distribution of the whole target geometric model is effectively ensured, and the dose distribution of an irradiated part of a patient can be rapidly and accurately acquired.

Description

technical field [0001] The invention relates to the technical field of radiotherapy dose measurement, in particular to a method for determining dose distribution and a device for determining dose distribution. Background technique [0002] With the development of radiation therapy technology, many tumor patients need to be treated by radiation therapy. Accurate radiation therapy is the goal that radiation therapy for tumors always pursues. Among them, accurate calculation and determination of the dose distribution of the irradiated part of the patient plays an important role in radiation therapy. decisive role. [0003] The Monte Carlo calculation method can accurately determine the dose distribution of the irradiated part of the patient. Monte Carlo method, also known as statistical simulation method or random sampling technique, is a random simulation method, a calculation method based on probability and statistical theoretical methods, which can be obtained by using rand...

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Problems solved by technology

The Monte Carlo dose calculation method is a method with high accuracy among all current dose calculation methods, which can meet the requirements of clinical dose calculation accuracy in both homogeneous and heterogeneous media, but the calculation method has slow convergence speed and long calculation time

[0004] At present, the Monte Carlo method has been widely used in medical dose calculation and verification, and is recognized as the most accurate of all current dose calculation methods, which can accurately obtain the dose distribution of uniform and non-uniform areas, but Monte Carlo The calculation method has the fatal weakness of slow convergence speed and long calculation time, which is difficult to be accepted by clinical radiation therapy

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