By sharing this link, I acknowledge that I have read and understand the Terms and Conditions.
30.1 MB (2.4 MB compressed)
4245 x 2480 pixels
35.8 x 21.1 cm ⏐ 14.1 x 8.3 in (300dpi)
PROF. J. LEVEILLE / SCIENCE PHOTO LIBRARY PROF. J. LEVEILLE / SCIENCE PHOTO LIBRARY
Human kidneys. Coloured gamma scan (scintigram) of healthy human kidneys, which excrete urine and regulate the blood and electrolyte balance. The kidneys' centres (orange/white) have absorbed more radioactive tracer than their outsides (yellow/ brown). 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, producing 'hot spots'. Gamma scans are tissue "slices".
Model release not required. Property release not required.