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a picture revealing the presence of radioactive material, the film being laid directly on the object to be tested.
a photograph showing the distribution of a radioactive substance in a specimen. The photographic plate is exposed by radiation from the specimen Also called radioautograph

autoradiograph au·to·ra·di·o·graph (ô’tō-rā’dē-ō-grāf’)
An image recorded on a photographic film or plate produced by the radiation emitted from a specimen, such as a section of tissue, that has been treated or injected with a radioactively labeled isotope or that has absorbed or ingested such an isotope. Also called radioautograph.
au’to·ra’di·o·graph’ic adj.
au’to·ra’di·og’ra·phy (-ŏg’rə-fē) n.


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