title: Simultaneous production of negative and positive radiographic images.
abstract: A two-film radiographic procedure which simultaneously produces "white bone" and "black bone" images is described. The white bone image (the negative image) is a conventional radiograph. The black bone image (the positive image) would be used to print radiographic images on photographic paper. This technique should be limited to the examination of inanimate objects because of the large exposure that is necessary.
mesh_terms: D011861:Radiography, Dental / Q000295:instrumentation / Q000379:methods*