An apparatus and process for evaluating an image-wise exposed storage film positioned about a cylindrically-shaped member and linearly passed by a slot for interrogation by a laser light beam wherein a processing assembly (laser beam and pentraprism) is co-axially disposed within a processing chamber formed by the cylindrically-shaped member effecting a size reduction of the unit and increased clarity of the resultant image, and wherein the processing assembly includes a plate member disposed for rotation in a plane perpendicular to the axis of the processing chamber and having a pentaprism and a luminescence light sensor positioned proximate a contact point of the interrogating light beam with the storage film and further including converter electronics wherein after interrogation, the image scanned is digitally archived in a central processing unit.