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Dose distribution calculation method and system

A dose distribution and calculation method technology, which is applied in the medical and algorithm fields, can solve problems such as low precision, large calculation amount, and slow speed, and achieve the effects of high accuracy, improved dose calculation efficiency, and shortened calculation time

Active Publication Date: 2019-03-01
神州医疗科技股份有限公司
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  • Application Information

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Problems solved by technology

Among them, the energy deposition core includes the pencil beam core, and the model based on the pencil beam core can perform dose calculation of irregular tissues well, but further correction is required for the treatment of the inhomogeneity of human tissue and the irregular contour of the body surface. low precision
In addition, since the calculation of the metering distribution requires a large amount of calculation, the calculation of the metering distribution in the prior art takes a long time, is slow, and has low efficiency.

Method used

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  • Dose distribution calculation method and system

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Embodiment 1

[0061] This implementation discloses a dose distribution calculation method, which can obtain accurate dose distribution by combining water tank head modeling and Monte Carlo algorithm, and due to the use of cloud computing technology, multiple computing servers are started at the same time to calculate the dose distribution, which can effectively Shorten calculation time and improve calculation efficiency. Specifically, as figure 1 As shown, the dose distribution calculation method of this embodiment includes the following steps:

[0062] S110. Using a Monte Carlo algorithm, respectively simulate the dose distributions produced by the monoenergetic photon points emitted by the accelerator with different predetermined energies incident on the water film, to obtain N monoenergetic dose distributions; wherein, N is a natural number.

[0063] Here, the different predetermined energies are at least one predetermined energy value discretized according to the accelerator energy upp...

Embodiment 2

[0074] This embodiment discloses a dose distribution calculation method, which discloses a specific implementation method for determining energy spectrum distribution and flux distribution, such as figure 2 shown, including the following steps:

[0075] S210. Based on the measured dose distribution and the field data, determine the dose distribution of the photons on the central axis of the field as a function of depth, to obtain the central axis dose distribution.

[0076] Here, the central axis dose distribution is obtained by actually measuring the dose distribution in the water tank. Using the actual measured data and the single-energy dose distribution obtained by simulating the modeling of the nosepiece, the energy spectrum distribution of the central axis of the radiation field as it changes with depth can be determined.

[0077] S220. Based on the central axis dose distribution and the N monoenergetic dose distributions, determine the proportion of photons of various ...

Embodiment 3

[0091] This embodiment discloses a dose distribution calculation method, the method of this embodiment is the same as any of the methods implemented above, the difference is that this embodiment uses clusters for dose calculation, such as image 3 As shown, the dose calculation using the cluster specifically includes the following steps:

[0092] S310. The user server determines CT and field data.

[0093] S320. The user server, based on the energy spectrum distribution, the flux distribution, the acquired computerized tomography CT data and field data, determines the calculation amount for calculating the photon dose distribution in the human body.

[0094] S330. The user server uses cloud computing technology to determine the number of computing servers that need to be started according to the calculation amount, and starts the required number of computing servers.

[0095] Here, the computing server is a virtual server for cloud computing. In addition, the computing serve...

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Abstract

The present invention provides a dose distribution calculation method and system. According to the dose distribution calculation method and system, the dose distribution of single-energy photon pointincidence is obtained according to accelerator energy simulation; the energy spectrum distribution and flux distribution of photons is determined according to the dose distribution of the single-energy photon point incidence and dose data measured by a water tank; and based on a cloud computing technology, the dose distribution of the photons in a human body can be determined through the Monte Carlo algorithm according to the energy spectrum distribution, the flux distribution, acquired computed tomography (CT) data and field data. With the above technical schemes of the invention adopted, thedose distribution of the photons in the human body can be accurately simulated, with high precision realized. According to the technical schemes of the invention, the cloud computing is adopted to start a plurality of computing servers to simultaneously perform dose calculation, and therefore, calculation time can be effectively shortened, and dose calculation efficiency can be improved.

Description

technical field [0001] The present application relates to the fields of medical treatment and algorithm technology, in particular to a dose distribution calculation method and system. Background technique [0002] Malignant tumors, that is, cancer, as a very serious malignant disease, directly threatens people's lives. Currently, one of the most effective means of fighting cancer is radiotherapy. Radiotherapy is a treatment method that uses microscopic particles such as photons to kill tumor cells. The dose of microscopic particles in radiotherapy refers to the superposition value of energy deposited by microscopic particles during transport in the human body per unit area and per unit time. The dose of microscopic particles directly affects the effect of killing tumor cells, that is, the dose of microscopic particles is crucial to the effect of treating tumors, so it is necessary to precisely control the dose of microscopic particles during the treatment process. The prem...

Claims

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Application Information

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IPC IPC(8): G01T1/10G01T1/36
CPCG01T1/10G01T1/36
Inventor 史文钊徐成海史晓林
Owner 神州医疗科技股份有限公司
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