"ズーム・イメジアンプリファイア"の臨床使用経験

抄録

We have no doubt that there remained inrprovements in quality of image tube, television camera tube, optical lenses etc, in order to inprove the fluoroscopic image quality in case of an X-ray television system consisting of a closed circuit television and an image amplifier. The dual field X-ray image amplifier has been developed to obtain better image quality, but it has two defects. Namely, the one is the discontinuity of the image on changing, Viewing field diameter and the other is limited selection of two field sizes, nemely 11 inches and 7 inches. Recently, we have experienced the clinical application of zoom image amplifier which permits continuous change of the viewing field diameter from 11 inches to 5 inches and instantaneous change of the viewing field diamerer, combined with television and 70mm still camera for a fairly long time. As the result, we got the probe of the usefullness of zoom image amplifier, as a tool for gastro-intestinal diagnosis.