BSIP EDWIGE / SCIENCE PHOTO LIBRARY BSIP EDWIGE / SCIENCE PHOTO LIBRARY
CT scan diagnosis. Radiologists study computer tomography (CT) scans of a patient's head. The upper 8 scans show the front of the skull from above, whilst the lower two show it from the side. A CT scanner aims multiple X- rays beams at the patient, and uses a computer to combine the images produced by the beams in order to generate 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 diseases.
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