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British Journal of Radiology 74 (2001),1013-1016 © 2001 The British Institute of Radiology

Full paper

Spiral CT venography of the lower extremities by injection via an arm vein in patients with leg swelling

S Yoshida, MD, H Akiba, MD, M Tamakawa, MD, N Yama, MD, M Takeda, MD and M Hareyama, MD, PhD

Department of Radiology, Sapporo Medical University, School of Medicine, South-1, West-16, Chuo-ku, Sapporo 060-8543, Japan

Correspondence: Dr Satoru Yoshida, Department of Radiology, Muroran City General Hospital, Yamate-chou 3-8-1, Muroran 051-8512, Japan

The purpose of this prospective study was to assess the role of spiral CT venography (CTV) via an arm vein injection in the detection of causes of leg swelling. 42 consecutive patients with leg swelling were studied with indirect spiral CTV and ultrasound (US). CT parameters were as follows: 5 mm beam collimation; 7–10 mm s-1 table speed; and 2–3 mm reconstruction. Two consecutive spiral scans with a 40 s exposure time were performed from the pelvis to the knee. One bolus of 150 ml non-ionic contrast medium was injected at a rate of 3 ml s-1 by a power injector via an arm vein. The delay times to the first and second scans were 120 s and 180 s, respectively. Spiral CTV demonstrated not only deep vein thrombosis (DVT) (n=12) but also other abnormalities (n=25). US showed DVT (n=10) and some other abnormalities (n=5). The sensitivity and specificity of spiral CTV for femoropopliteal DVT, as compared with US, were both 100%. Two cases of DVT in the left common-external iliac vein (iliac vein compression syndrome) detected by spiral CTV were not confirmed by US. We were able to evaluate DVT above the knee with this method. Indirect spiral CTV showed promise for the diagnosis of DVT and other soft tissue diseases in patients with leg swelling.




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