A detailed image or picture created by detecting the radiation emitted from radioactive materials in a biological sample.
Combination of 'auto-' (self), 'radio' (radiation), and '-graph' (to write or record). This term became standard in biology and medicine in the mid-20th century as researchers used radioactive isotopes to track biological processes.
Autoradiographs are how scientists discovered where radioactive tracers went in living organisms—they basically let the radioactivity 'write' its own map, showing exactly what was being absorbed where.
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