Digital radiography (DR) has revolutionized medical imaging by replacing traditional film-based systems with digital sensors that provide immediate image acquisition and high-speed processing. Understanding its physical principles and maintaining strict quality control (QC) is essential for maximizing diagnostic quality while minimizing patient radiation dose.
: Uses a photostimulable phosphor plate within a cassette. X-rays create a "latent image" that is later scanned by a laser to release light, which is then digitized. Digital Radiography: Physical Principles and Qu...
: Captures images directly using fixed sensors. These systems can use direct conversion (converting X-rays to electrical charge via amorphous selenium) or indirect conversion (converting X-rays to light first using a scintillator like cesium iodide). X-rays create a "latent image" that is later
QC programs ensure that equipment consistently adheres to performance standards and safety regulations. QC programs ensure that equipment consistently adheres to
Digital imaging relies on the conversion of X-ray energy into electronic signals that can be processed by a computer. :
: Digital detectors have a wide dynamic range , meaning they can capture a vast range of X-ray exposures. Detective Quantum Efficiency (DQE) measures how efficiently the system converts X-rays into a quality image; higher DQE results in excellent contrast at lower radiation doses. Quality Control (QC) Procedures