The technical core of digital imaging is the DR detector

DR detector is a kind of precise and precious equipment, which plays a decisive role in imaging quality. Familiar with the performance index of detector can help improve imaging quality and reduce X-ray radiation dose.

Digital radiography (Digital Radiography, DR for short), with its significant advantages such as faster imaging speed, more convenient operation, higher imaging resolution, etc., has become the leading direction of digital radiography technology, and has won the world’s Recognized by clinical institutions and imaging experts. The core of DR technology is flat panel detector. DR detector is a kind of precise and precious equipment, which plays a decisive role in imaging quality. Familiar with the performance index of DR detector will help us improve imaging quality and reduce X-ray radiation dose. .

The scintillator located on the surface of the DR detector converts X-rays that have passed through the human body and then attenuates into visible light. The amorphous silicon photodiode array under the scintillator converts the visible light into electrical signals, forming a stored charge on the capacitance of the photodiode itself. The amount of stored charge of each pixel is proportional to the intensity of the incident X-ray. Under the action of the control circuit, the stored charge of each pixel is scanned and read, and the digital signal is output after A/D conversion, which is transmitted to the computer for image processing to form X Line digital image.

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Author：肖恩