Screening or Fluoroscopic Screening enables radiologists to visualize X-ray images in real time on a television monitor. This technique is used to perform a variety of X-ray procedures. In most instances this would involve the administration of some form of ‘contrast’ agent to outline the region of interest. Barium contrast is used to coat the gastrointestinal tract and may be swallowed as in a barium meal or introduced via the rectum in a barium enema. Intravenous contrast is used to define the veins in a venogram or to outline an abscess cavity in a sinogram. In all these procedures, the radiologist uses the X-ray images displayed on the television monitor to guide the examination and to position the region of interest to obtain ‘spot’ films. The spot films provide more detail than is available on the monitor and act as a permanent record of the examination. Spot films may be either conventional X-ray films or alternatively digital images that are temporarily stored on a computer system to be subsequently printed on laser film. You can learn more about the individual procedures on the Procedures web page.