Abstract #1290

Magnetic Resonance Angiography (MRA) of the Calf Station at 3T: Intraindividual Comparison between Non-Enhanced ECG-Gated Flow-Dependent MRA, Continuous Table Movement MRA & Time-Resolved MRA

Stefan Haneder¹, Ulrike I. Attenberger², Philipp Riffel², Thomas Henzler², Stefan O. Schnberg², Henrik J. Michaely²

¹Institute of Clinical Radiology & Nuclear Medicine , University Medical Center Mannheim, Mannheim, Germany; ²Institute of Clinical Radiology & Nuclear Medicine, University Medical Center Mannheim, Mannheim, Germany

The purpose was to compare 3D non-enhanced ECG-gated inflow-dependent MRA (NE-MRA) vs. continuous table movement MR-angiography and time-resolved TWIST-MRA in the calf station at 3.0T in a clinical patient collective. Image qualities (IQ) and degree of stenoses were rated on a four point scale. Positive and negative predictive values, sensitivity and specificity for stenoses detection were calculated for overall graduation and severe stenoses. The results suggest that contrast-enhanced MRA techniques are superior to NE-MRA in terms of IQ and detection of stenoses. If technically successful, NE-MRA is characterized by a high NPV and overestimation of the degree of stenoses.