Roll-film changer for whole-limb angiography: a trial production and its clinical application

We have developed an automatic roll-film changer (25 X 90 cm) for whole limb angiography that is equipped with a pair of graduated intensifying screens and a stationary grid. Satisfactory intermittent closure of the screens is achieved by mechanical means. The filming program can be set at one exposure every one to five seconds. A total of 20 serial angiograms can be obtained. In both experimental studies and clinical series, the roll-film changer has proved to be a valuable asset in angiographic evaluation of occlusive arterial diseases of the lower extremities.