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Radiology, Vol 189, 185-192, Copyright © 1993 by Radiological Society of North America
ARTICLES |
M Galanski, M Prokop, A Chavan, CM Schaefer, K Jandeleit and JE Nischelsky
Department of Diagnostic Radiology, Medical School Hannover, Germany.
PURPOSE: To evaluate the role of spiral computed tomography (CT) in diagnosis of renal arterial stenoses. MATERIALS AND METHODS: In 22 patients with suspected renovascular hypertension, spiral CT angiography of the renal arteries was compared with arterial digital subtraction angiography (DSA). For each patient, the peak transit time t (from intravenous injection to maximum enhancement of the abdominal aorta) was determined with a bolus injection of 15 mL of contrast medium. Spiral scanning started at the level of the superior mesenteric artery with a delay of t + 5 seconds after the start of injection of 100-150 mL of contrast medium. RESULTS: Spiral CT angiography demonstrated multiple renal arteries in five patients. A renal artery stenosis or occlusion was found in 15 of 22 patients (22 of 54 arteries). All findings were confirmed with arterial DSA. Vessel contrast on spiral CT scans was good to excellent in 19 of 22 patients. For diagnosis, axial-section and multiplanar reformatted images were superior to three-dimensional surface reconstructions and maximum- intensity projections. CONCLUSION: Spiral CT angiography is a promising screening method for renal artery stenosis.
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