Calibration method and system for filament current of X-ray tube

Abstract

The invention is applicable to the field of medical instruments and provides a calibration method for filament current of an X-ray tube. The calibration method comprises the following steps: acquiring current values of the X-ray tube for multiple times, calculating an average current value, judging whether the current filament current value conforms to a preset current value of a current level to be calibrated of the X-ray tube according to the average current value, if the current filament current value does not conform to the preset current value, calibrating the filament current value, carrying out the step of acquiring the current values of the X-ray tube for multiple times and calculating the average current value again, if the current filament current value conforms to the preset current value, saving the filament current value, and ending the calibration. According to the calibration method for the filament current of the X-ray tube, whether the current filament current value conforms to the preset current value of the X-ray tube can be judged only according to the average current value, and a user can know whether the filament current value is proper without a large number of tests; the calibration time is short, and the number of times of anode exposure is reduced; meanwhile, judgment and calibration are carried out according to the average current value obtained by multiple samplings and calculation; the precision of the calibrated current is high.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a method and system for calibrating the filament current of an X-ray tube. Background technique [0002] X-ray tomography (Computed Tomography, CT for short) equipment is a commonly used medical diagnostic equipment. By irradiating X-rays to the subject's body and receiving the X-rays that penetrate the subject's body, CT equipment can form photographic pictures that can present the shape of organs and tissues in the subject's body. In CT equipment, X-rays are generated and emitted by an X-ray tube. [0003] The X-ray tube is actually a large high vacuum cathode ray diode with a cathode and an anode on which a filament is arranged. During the working process of the X-ray tube, by applying current to the cathode filament, the filament is heated and free electrons gather, and then a high voltage is applied to the cathode and anode. Due to the sharp increase in the potential differe...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and system for calibrating the filament current of an X-ray tube, aiming to solve the problem of insufficient current accuracy, long calibration time, and multiple anodes of the X-ray tube when calibrating the filament current in the prior art. Sub-exposure causes serious problem of anode heating

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