Recently, a customer asked what is the DR detector? Let me tell you about it
The first DR flat-panel detector appeared in 1995. The 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 classified into direct conversion flat panel detectors and indirect conversion DR flat panel detectors. The material is different, the indirect DR flat panel detector is made of amorphous silicon. The direct type DR flat panel detector is made of amorphous selenium.
In terms of imaging quality, there are two performance indicators for evaluating its DR flat-panel detector, quantum detection efficiency and spatial resolution. Among them, the quantum detection efficiency determines the ability of the flat-panel detector to distinguish the density differences between different tissues, and the spatial resolution determines the ability of the DR flat-panel detector to distinguish the fine structure gaps in the tissues. However, different types of DR flat-panel detectors have different influencing factors that affect the quantum detection efficiency and spatial resolution.
In the indirect conversion type DR flat panel detector, the transistor that converts visible light into electrical signals and the coating of the scintillator can affect its quantum detection efficiency, while in the direct conversion type DR flat panel detector, the quantum detection efficiency is the same as that of the amorphous selenium layer. The strength of the charge capacity is related. The spatial resolution in the direct conversion type DR flat panel detector depends on the size of the thin film transistor matrix in the unit area, while in the indirect type DR flat panel detector, the size of the thin film transistor matrix in the unit plane affects its space. The size of the resolution.