ABSTRACT
Many medical imaging departments employ large computer storage facilities and networks known as picture archiving and communication systems (PACS). PACS systems allow instant recall and display of a patient’s imaging studies. Images can be displayed on monitors throughout the hospital in wards, meeting rooms and operating theatres as required. In modern practice, radiographic images are produced digitally using one of two processes, computed radiography and digital radiography. Fluoroscopy units fall into two categories: image intensifier and flat panel detector (FPD). The FPD consists of an array of millions of tiny detector elements. FPD units have several technical advantages over image intensifier systems including smaller size, less imaging artefacts and reduced radiation exposure. Computed tomography (CT) is an imaging technique whereby cross-sectional images are obtained with the use of X-rays. In CT scanning, the patient is passed through a rotating gantry that has an X-ray tube on one side and a set of detectors on the other.
