数十年来,自脉管内注入高密度造影剂以显示器官和大血管早已成为常规方法。现在,它已大量用于肾盂、尿路、胆囊、动脉造影以及CT 诊断。目前在德国每年大约进行200万次X 线造影检查。然而其缺点也是明显的。那就是血管内 For decades, intravascular injection of high-density contrast media to show organs and large vessels has long been the routine method. It has now been extensively used in the renal pelvis, urinary tract, gallbladder, arteriography and CT diagnosis. Currently in Germany about 2 million times a year X-ray examination. However, its disadvantages are also obvious. That is the intravascular