Digital X-ray imaging device and its system non-uniformity correction method

Abstract

The invention relates to a digital X-ray imaging device and a system nonuniformity correcting method thereof. The system nonuniformity correcting method is executed according to the following steps of: selecting a certain common shooting geometric position and setting exposure parameters; shooting an X-ray image and recording values of X-ray digital signal intensities; calculating an average value of the X-ray digital signal intensities of all pixels of the X-ray image and a correction coefficient of each pixel; and obtaining the corrected X-ray exposed image by actual application. The photoelectric nonuniformity correcting method is adopted; the correcting method is perfected; the whole correcting process is controlled by utilizing a computer program; the accuracy is high; and the corrected image has a good effect. According to the invention, a double-upright-post structure is adopted; the requirements of the chest position and the bed position can be met by utilizing one imaging medium; an imaging medium detector can automatically rotate by 90 degrees to meet the requirement of clinical application when being converted to the bed position from the chest position; and the digital X-ray imaging device is not limited by the space, has a simple structure and is low in cost.

Description

technical field [0001] The invention relates to the technical field of medical optical imaging, in particular to a sliding column type digital X-ray imaging device and a system non-uniformity correction method. Background technique [0002] An X-ray imaging device is a commonly used medical device. In traditional X-ray imaging devices with mechanical structures, in order to meet the imaging needs of various human organs, the general system needs to be equipped with a chest position and a bed position. As for the digital imaging system, two digital imaging media, such as two flat panel detectors, are required, which greatly increases the cost. The ceiling system is a solution, but it is relatively expensive and has high special requirements for the hospital installation environment. The commonly used sickle arm has more restrictions on the geometric structure of the system, and the patient's movement space is greatly limited. Another commonly used method is to use removabl...

AI Technical Summary

Problems solved by technology

In practical applications, the exposure parameters are different from the exposure parameters in the above steps. The existing method is to take similar exposure parameters for image correction. The correction effect obtained by this method is not perfect; and the operator needs to control the correction. , it is easy to cause inconsistencies in the calibration data, resulting in erroneous and repeated operations

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