ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Heart after heart attack. Gamma scanning used to assess a 74-year-old man's heart following a heart attack (myocardial infarction). A graph (upper right) shows the ejection fraction (EF) of the heart (the amount of blood it is pumping) to be an adequate 55%. The four models along bottom (based on gamma scanning) show four different parameters of heart function. Ischaemia (reduced blood flow) has been diagnosed for some areas of this heart. Radioactive tracers were used to label the blood and track its uptake by heart muscle by detecting its emissions of gamma rays.
Model release not required. Property release not required.