<p>AUTORADIOGRAPHIC PROCESS An autoradiographic process for obtaining information on one or two dimensional location of radioactively labeled substances contained in a sample selected from the group consisting of tissue of an organism and a medium containing tissue of an organism and/or substances such as DNA originating from an organism, which comprises: placing said sample and a stimulable phosphor sheet having a phosphor layer comprising a stimulable phosphor dispersed in a binder together in layers for a certain period to cause said phosphor sheet to absorb at least a portion of radiation energy emitted by the radioactively labeled substances in said sample; scanning said phosphor sheet with an electromagnetic wave to release at least a portion of radiation energy stored in said phosphor sheet as stimulated emission; and detecting the stimulated emission to obtain locational information on the radioactively labeled substances in the sample.</p>
