Contrast-Enhanced Ultrasound (CEUS) for the Characterization of Focal Liver Lesions – Prospective Comparison in Clinical Practice: CEUS vs. CT (DEGUM Multicenter Trial) Parts of this Manuscript were presented at the Ultrasound Dreiländertreffen 2008, Davos. - Seitz,K.; Strobel,D.; Bernatik,T. (Ultraschall in Med, 2009)