JOSH SHER / SCIENCE PHOTO LIBRARY JOSH SHER / SCIENCE PHOTO LIBRARY
Gamma scan. Woman being prepared for a gamma or radionuclide scan of her hands by a radiographer. This diagnostic technique is based on the detection of radiation emitted by radioactive substances known as radionuclides, which are introduced into the body. Specific radionuclides are swallowed by the patient. These are absorbed in different concentrations by different types of tissue, where they emit radioactive gamma rays. The rays are detected by the gamma camera (lower centre) which produces a coloured image showing the functioning of specific organs and physiological systems. Gamma scans are also known as scintigrams.
Model release available. Property release not required.