From the *Department of Radiology, Medical University of Lübeck, Lübeck;
the †Department of Radiology, Universitätsklinikum Steglitz, Berlin;
the ‡Department of Radiology, Klinikum Großhadern der Ludwig-Maximilians-Universität, München;
the §Department of Radiology, Medical University of Würzburg, Würzburg;
and ∥Bracco-Byk Gulden, Konstanz, Germany.
Reprint requests: Caspar Brekenfeld, MD, Department of Diagnostic Radiology, Medical University of Zürich, Rämistrasse 100, CH—8091, Zürich, Switzerland; e-mail: [email protected]
Received September 21, 2000, and accepted for publication, after revision, January 30, 2001.