Fast obtaining method of dose distribution of photon beam in target body

An acquisition method and target body technology, which is applied in the field of rapid acquisition of the dose distribution of photon beams in the target body, can solve problems such as limited applications, achieve the effects of improving computing performance, increasing acquisition speed, and meeting clinical needs

Inactive Publication Date: 2013-12-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Dose calculations need to be repeated in the optimization of the intensity-modulated radiation therapy plan, but the speed of the dose

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  • Fast obtaining method of dose distribution of photon beam in target body
  • Fast obtaining method of dose distribution of photon beam in target body
  • Fast obtaining method of dose distribution of photon beam in target body

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[0023] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings of the specification.

[0024] Such as figure 1 As shown, the present invention designs a method for quickly acquiring the dose distribution of a photon beam in the target body, and obtaining the dose distribution formed in the target body by the photon beam emitted by the medical electron accelerator and directed to the target body, including the following steps:

[0025] Step A01. Construct a beam coordinate system and a target body coordinate system, and establish a dose calculation grid in the target body coordinate system;

[0026] Step A02. Obtain the coordinate conversion relationship between the beam coordinate system and the target body coordinate system;

[0027] Step A03. In the beam coordinate system, obtain the total energy released per unit mass in the target body by each ray in the photon beam emitted by the medical electron acc...

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Abstract

The invention relates to a fast obtaining method of dose distribution of a photon beam in a target body. A beam coordinate system and a target body coordinate system are constructed for the obtaining method of dose distribution of the photon beam, and a dose computational grid is set up in the target body coordinate system. Due to the fact that in the process of obtaining the coordinates of the point of intersection of a ray in the photon beam and the dose computational grid in the target body coordinate system, the coordinates are obtained by utilizing a seed plane and a coordinate horizontally moving method, the speed in obtaining the coordinates of the point of intersection can be effectively improved, the obtaining precision of dose distribution of the photon beam is ensured, meanwhile, fast obtaining of dose distribution of the photon beam is achieved, and clinical requirements for optimization design of the intensity modulated radiotherapy plan are met.

Description

technical field [0001] The invention relates to a method for rapidly acquiring the dose distribution of a photon beam in a target body. Background technique [0002] Acquisition of dose distribution is one of the core technologies of radiation therapy planning system, which is of great significance in the process of radiation therapy. Before the patient receives radiation therapy, according to the radiation therapy plan designed by the medical physicist, the three-dimensional distribution of the dose that the patient will receive can be pre-simulated and calculated. The accuracy and efficiency of dose calculation are important indicators to measure the quality of radiotherapy planning system. [0003] At present, the commonly used dose distribution acquisition methods include Monte Carlo method, collapsed cone algorithm and pencil beam algorithm. The Monte Carlo method realistically simulates the process of a large number of particle energy deposition. The simulation result...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 周正东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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