BSIP, CAVALLINI JAMES / SCIENCE PHOTO LIBRARY BSIP, CAVALLINI JAMES / SCIENCE PHOTO LIBRARY
Male skeleton. Coloured gamma scans of a healthy male skeleton seen from the front (left) and back. Gamma scans involve injecting a radioactive isotope into the body. The gamma radiation given off by the isotope is detected and converted into an image. Gamma scans can be used to detect bone tumours.
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