[Clinical test of the Delcomat miniaturisation system (author's transl)]

A series of 1720 roentgen examinations consisting of 5178 roentgen films were copied with the Delcomat (de Oude Delft) copying apparatus. The copies were re-examined after some months, and the diagnoses were compared with the original ones made of normal size films. The diagnostic accuracy was in most examinations not significantly reduced. There was some extraneous variation not depending on the copying method in complicated pulmonary and cardiologic problem cases, and the lack of immediate screening information also caused some reduction in the diagnostic accuracy. The presumption that there would be some information loss in the miniaturized copies led to false positive statements in some cases. The diagnoses were made by a group of radiologists consisting of one specialist (staff member) and two registrars (residents).