49.5 MB (1.4 MB compressed)
3176 x 5445 pixels
26.9 x 46.0 cm ⏐ 10.6 x 18.1 in (300dpi)
GJLP / SCIENCE PHOTO LIBRARY GJLP / SCIENCE PHOTO LIBRARY
Human skeleton. Coloured gamma scan (scintigram) of a healthy human skeleton. The skeleton is vital for bodily support, protection and movement. A gamma scan shows the concentration of an injected radioactive isotope (radionuclide) after it has accumulated in the body region to be observed. In this case Technetium-99m has been used to check the health of the bones. The isotope emits gamma rays which are detected as flashes of light by a gamma camera. The technique may be used to detect and assess the spread of cancer, as the isotope would concentrate in such a region, making the cancer appear as a "hot spot".
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