Due to recent advances in vascular surgery, the importance of accurate visualization of vascular lesions and of evaluation of circulation has become well established (1). Competent arteriography must conform to the three criteria formulated by Bazy and Reboul (2): 1. It must be complete, that is to say, it must show the whole arterial ramifications from the point of exploration to the end of the limb. 2. It must be serial, that is to say, it must show the characteristic moments of the filling of the arterial network into which the injection was made, in a series of pictures taken at intervals of seconds. 3. It must be chronographic, with measurement of the time which intervenes between the beginning of the injection of the opaque medium and the various roentgenographic exposures taken. Several groups have attacked this problem successfully in regard to the first two requirements. In general, their methods have consisted of variations on the following scheme: one 14 × 17-inch cassette is placed under the abdomen and the pelvis while two 14 × 17-inch cassettes are placed under the legs, one half of each blocked off by lead. Following injection and after each exposure, the leg cassettes are shifted so that the unexposed part is in position for exposure and the previously exposed portion is protected by the lead shield. This procedure requires either having two roentgen tubes, one centered over the bifurcation of the aorta and the other over the knees, or moving the overhead tube following the first exposure from the abdomen to the knees. As a whole, the resulting radiographs are quite satisfactory (3, 4, 5). Another method consists of exposing a film, changing cassettes by hand while an assistant bodily pulls the patient cephalad a measured distance, and then exposing a second film, etc. (2). Morton and Byrne recently described a method employing a scanographic exposure of two 14 × 17-inch films in a 14 × 36-inch cassette (6). These methods have several complicating disadvantages, some of which the authors mention: 1. Several trained assistants are needed to “juggle” cassettes. 2. Two of these assistants must work close to the tube (150 cm. target-film distance) unprotected by a cone. 3. With rapid serial sequence of events involving several persons, a mistake due to the human factor is possible. 4. Damage to the tube could conceivably occur in the process of moving the stand with the hot rotating anode (4). 5. The injection of large amounts of concentrated opaque medium (up to 60 c.c.) is necessary. 6. The patient must be moved in relation to the radiographic table with the aortography needle in place (2). A recent article by Eyler of the Henry Ford Hospital describes a method of lumbar and peripheral arteriography utilizing several 14 × 36-inch cassettes in a manually operated cassette changer. The timing of exposures is accomplished by a simultaneous lead 1 electrocardiogram. The quality of the resulting roentgenograms is excellent (7).