False-colour scintigram (gamma camera scan) of a normal human heart. This is an example of a \cold spot\" scan, recorded after the intravenous injecti

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False-colour scintigram (gamma camera scan) of a normal human heart. This is an example of a \cold spot\" scan, recorded after the intravenous injection of a radio-isotope, thallium-201. The central horse-shoe shaped area represents a normal uptake of the radio-isotope by the myocardium (heart muscle) of the left ventricle. The concentration of thallium-201 in heart muscle depends on a normal blood flow and the integrity of the membranes surrounding the muscle cells of the heart. Comparison of scans made during exercise & at rest may reveal defects in blood supply (ischaemia) & infarction (death of heart muscle) resulting from a heart attack."

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Size: 4031px × 4002px
Photo credit: © CENTRE JEAN PERRIN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: anatomy, body, cold, heart, human, medicine, nuclear, scan, scintigram, spot, thallium