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Method and device for determining dose distribution

A dose distribution and dose technology, applied in dosimeters, radiation measurement, instruments, etc., can solve the problems of dose calculation modeling and the difficulty of ensuring accuracy

Active Publication Date: 2021-06-04
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method, device and storage medium for determining dose distribution, so as to solve the problem of greater difficulty in dose calculation modeling and ensuring accuracy

Method used

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  • Method and device for determining dose distribution
  • Method and device for determining dose distribution

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Embodiment 1

[0045] This embodiment provides a method for determining the dose distribution, including: measuring the dose curve formed in the phantom after the beam is filtered by the dose correction device, obtaining the attenuation parameter and the hardening parameter according to the dose curve; obtaining the attenuation parameter according to the attenuation parameter an attenuation flux map of the dose correction device, and obtain a hardening flux map of the dose correction device according to the hardening parameters; The dose map forms the dose field distribution in the phantom after the beam passes through the dose correction device.

[0046]The attenuation parameters include an attenuation parameter in a first direction and an attenuation parameter in a second direction, and the angle between the first direction and the second direction is greater than 0 degrees and less than 180 degrees. The hardening parameters include hardening parameters in the first direction and hardening...

Embodiment 2

[0094] In the clinical application of radiotherapy, the standard irradiation field is generally changed to an irregular field with additional lead weights to fit the shape of the target area and protect the surrounding normal tissues. The thickness of the lead block directly affects the photon flux and hardness of the transmitted photon beam. A method and model for determining dose distribution provided in this embodiment can be applied to dose calculation with uneven or uniform thickness of lead blocking or multi-layer lead blocking technology in radiotherapy planning.

[0095] The difference from Embodiment 1 is that the dose correction device in the embodiment of the present invention is a single-layer lead barrier or a multi-layer lead barrier, the single-layer lead barrier is a lead barrier with uneven thickness, and the multi-layer lead barrier forms a A wedge shape with uneven thickness.

[0096] Image 6 It is a schematic diagram of the wedge-shaped dose distribution...

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Abstract

The invention provides a method for determining dose distribution, which comprises the following steps: measuring a dose curve formed in a die body after a beam is filtered by a dose correction device, obtaining an attenuation parameter and a hardening parameter according to the dose curve, obtaining an attenuation flux diagram of the dose correction device according to the attenuation parameter, obtaining a hardening flux diagram of the dose correction device according to the hardening parameters, and forming dose field distribution of the beam in the die body after the beam passes through the dose correction device according to the attenuation flux diagram of the dose correction device and the hardening flux diagram of the dose correction device. According to the method for determining the dose distribution, the calculation accuracy is improved, and meanwhile the algorithm modeling process of the dose correction device is simplified.

Description

technical field [0001] The present invention relates to the technical field of medical equipment, in particular to a method for determining dose distribution, a computing device and a computer-readable storage medium. Background technique [0002] The medical linear accelerator is the main equipment for clinical radiotherapy at present, and the dose correction device is a dose correction filter plate commonly used in the design of radiotherapy treatment plan. The dose correction device is usually composed of a wedge-shaped plate with uneven thickness in the wedge-shaped direction. After the beam generated by the accelerator is filtered by the wedge-shaped plate, the isodose curve will appear inclined on both sides of the central axis of the wedge-shaped direction. [0003] Generally, the beams produced by medical linear accelerators are composed of photons of different energies, which are generally called multi-energy photon beams. After the multi-energy photon beam passes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/02G01T7/00
CPCG01T1/02G01T7/005
Inventor 薛万冬金朝叶绍强韩卫刘艳芳
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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