Physics, Techniques and Procedures

System geometry

in digital X-ray imaging, the system geometry refers to the form of the X-ray illumination and detector used in the process of image acquisition. X-ray imaging systems in current use can be divided into scanning and non-scanning geometries. In non-scanning systems, a large field of view FOV area detector is used to capture all parts of the image simultaneously. Such systems have the advantages of minimal X ray tube loading and rapid image acquisition, but suffer from large amounts of scattered radiation, just as the conventional X-ray film systems. Scanning systems utilize either one or more slit detectors or small, high resolution area detectors. In scanning geometries, the X-ray beam is confined to the region of the detector and collimation can be used to greatly reduce scatter. The slit or spot detector is then scanned in a manner sufficient to provide a complete image of the desired anatomy. See scanned projection digital radiography.

DLP