CT detector and DR detector

Some customers have inquired about the difference between CT detector and DR detector. Now I will share with you the difference between CT detector and DR detector.
CT uses X-rays to scan a certain part of the human body with a certain thickness. CT can find any part of the body according to the difference in absorption and transmittance of X-rays by different tissues of the human body. Small lesions in the site. CT examination has high diagnostic value for central nervous system diseases and is widely used.
The CT detector directly receives the photon signal after the X-ray beam passes through the illuminated object, and converts it into the corresponding electrical signal through its own characteristics. A typical CT detector includes scintillators, photoelectric conversion arrays, and electronics.
DR detector refers to a new technology that directly performs digital X-ray photography under computer control. It uses amorphous silicon flat-panel detectors to convert the X-ray information that penetrates the human body into digital signals, and the computer reconstructs the image and performs a series of Image post-processing.
The classification of DR detectors is as follows:
CCD: Because there are certain physical limitations, and the quality of the collected images of the CCD device is far from that of the amorphous flat-panel device. However, because of the price advantage of CCD, there are still manufacturers using this technology.
Amorphous flat panel: Amorphous flat panel is divided into two types according to different materials: a-Se amorphous selenium layer and a-Si amorphous silicon layer a-Se (amorphous selenium flat panel detector): this is a direct detection Technology, in which X-rays are directly detected in the selenium paint layer and then converted into digital signals. At present, this technology has a limited application range. a-Si (Amorphous Silicon Flat Panel Detector): This is a two-step digital conversion technology in which X photons are first converted into visible light and then converted into digital signals. Due to the different coating technology, it can be divided into amorphous silicon + gadolinium oxysulfide flat panel detectors and amorphous silicon + cesium iodide flat panel detectors. At present, this technology is widely used and has a very wide range of applications.
Therefore, the more mature DR detector is the X-ray flat panel detector.

Author：Lillian