Flat-panel X-ray detectors convert X-rays into digital images for medical and industrial use. Two main types are scintillator-based amorphous silicon (indirect) and direct-conversion amorphous selenium. They offer faster imaging, higher resolution, reduced radiation dose, and streamlined digital workflows compared with film. Choose based on required sensitivity, resolution, speed, cost, and integration needs. Verify DQE/MTF specs and service options before purchase.