DR flat panel detector is the core technology of DR technology and plays a decisive role in its imaging quality. From the perspective of energy conversion, it can be divided into two types: direct conversion X-ray flat panel detectors and indirect conversion X-ray flat panel detectors. Its material is different, the material of indirect X-ray flat panel detector is amorphous silicon. The material of the direct X-ray flat panel detector is amorphous selenium.
In terms of imaging quality, there are two performance indicators for evaluating the X-ray flat panel detector, quantum detection efficiency and spatial resolution. Among them, the quantum detection efficiency determines the ability of the flat panel detector to resolve the density difference between different tissues, and the spatial resolution determines the ability of the flat panel detector to resolve the fine structure difference in the tissue. Different types of X-ray flat panel detectors have different influence factors on quantum detection efficiency and spatial resolution.