[CT cavography: diagnosis of iliocaval thrombosis by administration of contrast medium into the foot]

CT permits demonstration of thrombus in the iliac veins and inferior vena cava by injecting contrast material into vein in the dorsum of the foot. This technique, called CT cavography in this paper, has advantages over conventional venography or DSA and also over sonography. It is indicated following phlebographic demonstration of recent pelvic thrombosis and for demonstrating tumour thrombi in patients with carcinomas of the kidney.