CT scanning. Patient having a CT (computed tomography or CAT) scan of her abdomen. She is seen in the background lying on a mobile table which is passing through the circular scanner. In the foreground is the control room in which a radiologist remotely operates the scanner. On the screen (at right) are "slice" images obtained of the patient's abdomen. CT scanning combines the use of a computer and fine X-ray beams to produce cross-sectional "slices" through the body. CT scans produce good contrast between soft tissues and bone, and are useful in diagnosing cancerous tumours and other disease.
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