What is the function of a thin-film transistor (TFT) in flat-panel detector systems?

The thin-film transistor (TFT) plays a crucial role in flat-panel detector systems by collecting electrical charge produced when x-rays interact with the detector material. In digital radiography, the TFT is essential for converting the detected x-ray signals into electrical signals. When x-rays hit the detector, they generate electron-hole pairs; the TFT helps to capture and transport these charges to form an image.

This process is fundamental to the functioning of flat-panel detectors because it allows for the precise reading and processing of the x-ray data, which ultimately contributes to the creation of the digital image. The efficiency and speed with which the TFT can collect these charges directly affect the overall image quality and the system's responsiveness. Therefore, the collection of electrical charge by the TFT is integral to the operation and effectiveness of flat-panel detector systems in digital radiography.