Calibration method for cathode filament emission characteristic curve of X-ray generator

Abstract

The invention provides a calibration method for a cathode filament emission characteristic curve of an X-ray generator, and belongs to the technical field of X-ray generators. The calibration method comprises: in a practical operation process of an X-ray generator, setting filament current based on a first cathode filament emission characteristic curve, and generating X-rays through operation of the X-ray generator, and acquiring actual bulb current corresponding to the filament current, and using the filament current and the actual bulb current to dynamically calibrate the first cathode filament emission characteristic curve, to update to a second cathode filament emission characteristic curve. The calibration method can make the cathode filament emission characteristic curve dynamically calibrated, and the cathode filament emission characteristic curve is more accurate, and the setting of the bulb current is more accurate.

Description

technical field [0001] The invention belongs to the technical field of X-ray generators, and relates to the calibration of tubes of X-ray generators, in particular to a method that can dynamically calibrate the emission characteristic curve of cathode filaments (Filament) of tubes of X-ray generators. method and a method for controlling tube current (Tube Current) based on the curve obtained by calibration of the method. Background technique [0002] X-ray generators are widely used in various devices that use X-rays, for example, devices that use X-rays to expose images. In various devices, it is necessary to accurately control the dose of X-rays. [0003] In an X-ray generator, X-rays are usually generated in a vacuum bulb, and the cathode filament and anode target of the X-ray generator are set in the bulb; the cathode filament is energized to generate a filament current (Filament Current), which can The cathode is heated to emit a large number of electrons, which form a...

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Problems solved by technology

[0007] At present, the field has been pursuing the precise control of the bulb current. For example, the Chinese patent application number CN201010570850.7 is realized by improving the control circuit; for example, by updating the calibration cathode filament emission characteristic curve according to the specified cycle (for example, once every six months) to make the setting of the tube current more accurate, but this method is usually difficult to meet the accuracy requirements of the tube current, and the maintenance cost of the equipment is high, and the calibration workload is heavy

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