ELSCINT / SCIENCE PHOTO LIBRARY. ELSCINT / SCIENCE PHOTO LIBRARY.
Full-body scans of a healthy man injected with a radioactive isotope, showing front (right) & back views. The isotope in this case tends to concentrate in the bones, notably the spine, ribs & pelvis. The scans are colour-coded according to the intensity of the gamma radiation emitted by the isotope, ranging from blue for the lowest emission, through green & yellow to orange & brown for the highest emission.
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