CJP / CLERMONT-FERRAND / CNRI / SCIENCE PHOTO LIBRARY CJP / CLERMONT-FERRAND / CNRI / SCIENCE PHOTO LIBRARY
Male skeleton. Coloured frontal (left) and rear (right) gamma scans of a healthy male skeleton. The skull is at top, the spine runs down centre and the pelvis is at bottom. Gamma scans use a radioactive tracer, in this case technetium-99m, to highlight tissues in the body. A gamma camera detects the gamma radiation emitted by the tracer.
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