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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.