MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
CT scanning. Radiographer (silhouetted, left) analysing CT scan images of a patient's brain. Computed tomography (CT) uses X-rays to produce cross-sectional images of the scanned area. The patient (upper left) is being passed through the hole in the scanner. A computer compiles the data into multiple image slices, seen on the screen at lower right.
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