title: Application of electronic spot imaging (ESI) to gastrointestinal roentgen examinations.
mesh_terms: D001466:Barium Sulfate; D003106:Colon / Q000000981:diagnostic imaging; D004064:Digestive System / Q000000981:diagnostic imaging*; D005471:Fluoroscopy / Q000295:instrumentation*; D006801:Humans; D010779:Photofluorography / Q000295:instrumentation*; D013270:Stomach / Q000000981:diagnostic imaging; D013679:Technology, Radiologic / Q000295:instrumentation*
chemical_list: D001466:Barium Sulfate