[en] Dynamic CT of abdominal organs was performed in a few cases, and movement of contrast medium in abdominal organs, the capacity of abdominal dynamic CT to visualize vascular cavity less than middle size, and the evaluation of abdominal dynamic CT in the diagnosis of malignant tumor were reported. After 50 ml of 60% meglumine iotalamate was injected into cubital vein in 15 seconds (3.3 ml/sec.), it was clarified by the first scan after the injection that contrast medium enough to visualize vascular cavity of 2 mm in diameter existed in vessels. That is, SOMATOM SD can visualize the intravascular phase of the contrast by the first or the second scan after the injection. Abdominal dynamic CT was very useful for the diagnosis of abdominal malignant tumor. (Tsunoda, M.)