Digital flat panel detector

The digital flat-panel detector is a sophisticated and expensive device. It uses an area array detector to replace the traditional film material, and converts the image signal generated by the X-ray through the object into a digital signal image. This digital image is easy to store and process, and conforms to industry standards.
Digital X-Ray Radiography (DR) is a new technology developed in the 1990s. It has significant advantages such as fast imaging speed, convenient operation, and high imaging accuracy. It has become the dominant direction of digital radiography technology.
The core component of digital X-ray photography is the flat panel detector. According to the materials, digital flat-panel detectors can be divided into amorphous silicon and amorphous selenium.
The principle of amorphous silicon is that after the scintillator is irradiated by X-rays, the X-ray photons are converted into visible light, and then the amorphous silicon layer with photodiode function is converted into image electrical signals, which are detected by the TFT array, and finally through A/D conversion . Acquire digital images; the principle of amorphous selenium is that the amorphous selenium layer directly generates electrical signals after being irradiated by X-rays, passes through the TFT detection array, and then undergoes A/D conversion to finally obtain a digital signal image. Amorphous selenium flat panel detectors have very high requirements on the working environment during use, with short life span, high failure rate, and maintenance costs much higher than amorphous silicon flat panel detectors. Therefore, amorphous silicon flat panel detectors currently dominate the market.
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Author：Lillian