Identification and correction method for tremor or tapping artifact in dark-field image template of detector

Abstract

The invention provides an identification and correction method for a tremor or tapping artifact in a dark-field image template of a detector. The method comprises: (1), dark-field image templates having different collection delays are collected and are used as standard image templates; (2), bad pixel searching is carried out on the standard image templates and bad pixels are replaced; (3), a clinical dark-field image template is collected; (4), bad pixel searching is carried out on the clinical dark-field image template and bad pixels are replaced; (5), offset correction is carried out on the clinical dark-field image template after bad pixel replacement; and (6), tremor or tapping artifact identification is carried out on the clinical dark-field image template after offset correction. According to the invention, identification and correction of a tremor or tapping artifact can be completed simply and rapidly; and tremor or tapping artifact can be corrected effectively in real time on the premise that the dark-field image quality of the normal dark-field image is hardly changed. Therefore, the anti-tremor or tapping performance of the flat panel detector is improved substantially; and the cost is lowered.

Description

technical field [0001] The invention belongs to the field of X-ray flat-panel detectors, in particular to a method for identifying and correcting tremor or knocking artifacts in a dark-field image template of a detector. Background technique [0002] When the detector is in use, various corrections need to be made to improve the image quality of the dark field. One of the most important corrections is offset correction, that is, offset correction. A dark field image with the same exposure time delay as the exposed bright field and dark field image. Since this dark field image was collected after the bright field and dark field image was collected, the temperature difference between the two dark field images is not much different, which can be Neglect, and the two dark field images have the same exposure delay time, so the leakage current is also the same, such a dark field image is called a dark field image template, subtract the dark field image from the bright field image,...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a method for identifying and correcting tremor or percussion artifacts in the dark-field image template of the detector, which is used to solve the problems of the detector in the prior art in order to reduce tremor artifacts. Influence of dark-field image quality Adding processing components to each component that constitutes the detector to contain vibrations, the problem that adding anti-vibration measures to a certain component alone is ineffective, difficult to analyze, and adding to each component The problem of expensive vibrating parts

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