Calibration method of X-ray generator tube current

A calibration method and technology of X-ray machines, which are applied in the fields of radiological diagnostic instruments, radiation generation arrangements, medical science, etc., can solve problems such as inaccurate current parameters, improve output accuracy, reduce calibration time, and reduce exposure times Effect

Active Publication Date: 2017-08-18
ZHUHAI HOKAI MEDICAL INSTR
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Problems solved by technology

[0007] The purpose of the present invention is to provide a calibration method of X-ray machine tube current, which is used to control t

Method used

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  • Calibration method of X-ray generator tube current
  • Calibration method of X-ray generator tube current
  • Calibration method of X-ray generator tube current

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[0022] Reference figure 1 , figure 1 Shown is the structural block diagram of the X-ray machine control system. The X-ray machine control system mainly includes A / D acquisition module, D / A control module, micro control system, touch screen module, communication module, exposure control module and storage module. Among them, the A / D acquisition module is used to collect the voltage signal of the filament current, and the AD sampling module is the LF353 integrated operational amplifier filter circuit. It is a proportional operation power reduction circuit with an amplification factor of less than 1. After the signal is collected, the voltage value of the input signal can be reduced to In the proper range (0~3.3V), prevent the voltage value of the collected filament current from exceeding the input safety voltage (3.3V) of the microcontroller. The D / A control module is an LF353 integrated operational amplifier filter circuit. It is a proportional arithmetic power amplifier circuit ...

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Abstract

The invention discloses a calibration method of X-ray generator tube current. The method comprises the following steps of dividing an initial characteristic curve of pipe current-filament current into N sections, using a straight line to connect two end points of each section of the curve, and calculating an equation (Yn=knx+b) of each section of the straight line, wherein kn represents the slope of the nth section of the straight line, n=1,...,N, b is a constant, x is a pipe current value, and Yn is a voltage value of the filament current; collecting the pipe current value of the two end points of each section of the straight line and the corresponding voltage value of the filament current, comparing the collected data with data of the initial characteristic curve, wherein if an error is smaller than an error threshold value, then the equation of the section of the straight line is constant, and if the error is larger than the error threshold value, the collected data is utilized to renew the equation of the section of the straight line; using the equation of the straight line to calibrate the initial characteristic curve, selecting a corresponding equation of the straight line according to the pipe current value which needs to be utilized, and using the equation of the straight line to calculate the corresponding voltage value of the filament current. Through the calibration method of the X-ray generator tube current, calibration can be conducted on the pipe current of a ball pipe, and thus precise output of the pipe current is achieved.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, in particular to a method for calibrating the tube current of an X-ray machine. Background technique [0002] Medical diagnostic X-ray machine is a medical imaging device that generates X-rays for medical diagnosis. It is mainly used in the fields of surgical intervention and medical image diagnosis. When X-rays are used in medical diagnosis, they are mainly based on the penetration, differential absorption, photosensitivity and fluorescence of X-rays. When X-rays pass through the human body, they are absorbed in different degrees. For example, the amount of X-rays absorbed by bones is more than that absorbed by muscles, so the amount of X-rays after passing through the human body is different, which carries the density distribution of various parts of the human body. Information, the strength of the fluorescent effect or photosensitive effect caused on the fluorescent screen or on the...

Claims

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Application Information

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IPC IPC(8): A61B6/00
CPCA61B6/40A61B6/582
Inventor 刘静勇者昊高立
Owner ZHUHAI HOKAI MEDICAL INSTR
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