Source:http://linkedlifedata.com/resource/umls/id/C0181272
UMD: Digitizers designed to convert transparent x-ray film images into a digital format according to the optical density of the film image, mapping them into a two-dimensional digital matrix. These devices typically consist of a light source, a light-transmission system, and a light sensor; a mechanical film-transporting system; an analog-to-digital converter; an electronic processor; and a computer interface. Some systems use a laser light source. Film digitizers facilitate radiographic image transfer and manipulation through hospital information systems, printing of images using laser printers, and permanent archiving in magnetic and/or optical disks.