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Medical accelerator beam automatic centring control system

A control system and automatic centering technology, applied in the direction of X-ray/γ-ray/particle irradiation therapy, etc., can solve the problems of dose uniformity disturbance, strong electromagnetic interference in the working environment, complex accelerator structure, etc., and achieve simple and compact structure Effect

Active Publication Date: 2017-06-20
江苏海明医疗器械有限公司
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Problems solved by technology

At present, the requirements for dose uniformity in the treatment field of medical accelerators are getting higher and higher. However, the existing accelerators have complex structures and strong electromagnetic interference in the working environment, and the dose uniformity is easily disturbed, which cannot guarantee high-quality requirements for dose uniformity in the treatment field.

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  • Medical accelerator beam automatic centring control system
  • Medical accelerator beam automatic centring control system
  • Medical accelerator beam automatic centring control system

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Embodiment Construction

[0023] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] The invention provides an automatic centering control system of a medical accelerator beam, which is used for automatic calculation and automatic adjustment of the symmetry and uniformity of the dose of a medical electron linear accelerator.

[0025] The medical accelerator beam automatic centering control system includes an X-direction control subsystem and a Y-direction control subsystem; the two control subsystems are independent of each other; wherein, the X and Y directions are respectively: on the beam section with the beam center as the origin two directions perpendicular to each other. The composition of the X-direction control subsystem and the Y-direction control subsystem is the same, including an ionization chamber, a preamplifier module and a beam current control module. Among them, in the subsystem, the ionization chamber, the preampl...

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Abstract

The invention discloses a medical accelerator beam automatic centring control system. The centring of the medical accelerator beam can be rapidly and effectively realized, the uniformity of treatment filed dosage can be improved, and the reliability is good. An ionization chamber is divided into a main ionization chamber and symmetrical branch ionization chambers, the deviation beam signal in the X or Y direction of the medical accelerator ray beam is detected by the branch ionization chambers, the deviation beam signal is amplified and rectified, and then the error value of the dosage rate symmetry between the two symmetrical branch ionization chambers is calculated, By changing the medical accelerator output-oriented power supply, the dosage rate symmetry error is corrected, so that the medical accelerator beam can meet the uniformity requirement in the treatment filed.

Description

technical field [0001] The invention relates to the technical field of electron linear accelerators used in medical treatment and industrial irradiation, in particular to an automatic centering control system for medical accelerator beams. Background technique [0002] The task of radiation therapy is to select, design and implement the best treatment plan according to the lesions of each patient. Such a plan mainly includes the size and direction of the treatment field, the dose contribution of each target area, and fractional treatment of the total prescribed dose. Therefore, it is necessary to automatically control the target position of the beam output by the accelerator, so as to ensure that the output dose meets the uniformity requirement in the treatment field. At this stage, the requirements for dose uniformity in the treatment field of medical accelerators are getting higher and higher. However, the existing accelerators have complex structures and strong electroma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
Inventor 柘江吴建兴杨玉志王春波陈璞
Owner 江苏海明医疗器械有限公司
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