Gamma ray scan of healthy human lungs

Gamma ray scan of healthy human lungs

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Credit: PROF. J. LEVEILLE/SCIENCE PHOTO LIBRARY

Caption: Human lungs. Coloured gamma scan (scintigram) of healthy human lungs, the respiratory organs. The centres of the lungs (brown, pink & white) have absorbed more radioactive tracer than the outsides (blue & green). Gamma scanning involves introducing a radioactive isotope (radionuclide) into the body, in this case Technetium-99m, which accumulates in the target organ. The isotope emits gamma rays which are detected as flashes of light by a gamma camera. Isotopes are chosen for their ability to gather in cancerous or inflamed tissue to produce 'hot spots'. Gamma scanning produces "slices" through tissues.

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Keywords: anatomy, gamma camera, gamma scan, human body, lung, lungs, normal, radionuclide scan, respiratory system, scan, scintigram

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