A 14x36 inch roll film changer with the following advantages is described: (1) it is a see-through design and can be used underneath the catheterization table, thus allowing roentgenography and fluoroscopy without moving the patient; (2) it can also be used at the end of the catheterization table with a floating table top; (3) it has the smallest possible outside dimensions, thus representing no significant storage problem; (4) excellent film screen contact is accomplished by a single pair of intensifying screens which are closed by intermittent negative pressure; and (5) an unlimited number of programs can be selected up to a total cycle time of 30 seconds and a maximal exposure rate of 1 per second.