SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Radiographer examining a series of computed tomography (CT) scans. CT images are constructed from data relating to the attenuation of a series of X-ray beams by body tissues, passed through the subject from numerous points around a circular scanner. The scanner is known as a tomograph (from a Greek word meaning slice). CT scans display good contrast between soft tissues in the body, differentiating between bone, fat and muscle due to the varying x- ray absorption characteristics of these tissues. Typical applications are in the location of tumours and blood clots. The photo was taken at the Royal Victoria Infirmary, Newcastle.
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