A medical diagnostic technique by which useful organ images are obtained from the radiation emitted by radionuclides that are introduced into organs, or from radiation absorbed by atomic nuclei within the organs. Typical examples are imaging obtained by recording the radiation emitted by a radionuclide such as 99mTc, and the 1H-NMR imaging obtained by whole body nuclear magnetic resonance measurements. See also bone imaging, brain imaging, and magnetic resonance imaging.
