The digital wireless flat panel detector is the most important core part of DR technology and plays a decisive role in the imaging quality. Digital wireless flat panel detector is a kind of precision and precious equipment, which plays a decisive role in the imaging quality. Familiarity with the performance index of the detector is helpful to improve the imaging quality and reduce the X-ray radiation dose. A customer from Ghana previously consulted about digital wireless flat panel detectors, which are used with mobile DR.
Flat panel detectors appeared in the 1990s and were used in the medical field before moving to non-destructive testing. The device is composed of very good thin-film semiconductor detectors based on the composition Guiwit array, which is disc-shaped and whose width and length of each pixel are represented by the size of a human hair as a unit of X-ray exposure. And each pixel collects and stores charge, and each pixel can be digitized. From the point of view of its energy conversion, it can be classified into two types: direct conversion flat panel detectors and intermediate conversion flat panel detectors.
The surface of the digital wireless flat panel detector is a layer of scintillator (cesium iodide) or phosphor material, the bottom is a layer of amorphous silicon with photodiode function, and the bottom layer is a layer of charge readout circuit. After the X-ray is incident, the scintillator or fluorescent material on the surface of the X-ray detector converts the X-ray photons into visible light (the phenomenon of light scattering will affect the spatial resolution of the image), and then the amorphous silicon converts the visible light into stored charge , store the charge and enter the readout circuit to convert the charge signal into a digital signal, complete the digital acquisition process, and then input the digital signal into the computer imaging system of the computer for imaging.
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