BSIP, ASTIER / SCIENCE PHOTO LIBRARY BSIP, ASTIER / SCIENCE PHOTO LIBRARY
Skeleton. Coloured gamma scan of a healthy human skeleton. The skull (top), ribcage (upper centre), and pelvis (centre) are seen. The spinal column leads from the skull down to the pelvis with the arms and leg bones attached to the body at the shoulders and hips. In this diagnostic technique a radioactive isotope is injected into the body, which accumulates in the tissues to be studied, here bone. Detection of the gamma radiation given off by the tracer isotope enables a picture of the bone structure to be obtained. It is often used for locating bone tumours.
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