Abstract #0625

Non-Contrast-Enhanced High-Temporal-Resolution 4D MRA with an Acquisition Window Covering Two Cardiac Cycles: Assessment of Arteriovenous Malformations in the Brain

Hlne Raoult¹,², Elise Bannier², Benjamin Robert³, Peter Schmitt⁴, Jean-Yves Gauvrit¹,²

¹Neuroradiology, University Hospital, Rennes, France; ²Unit VISAGES U746 INSERM-INRIA, IRISA UMR CNRS 6074, University of Rennes, Rennes, France; ³Siemens S.A.S., Saint Denis, France, Metropolitan; ⁴Siemens AG, MR Application & Workflow Development, Erlangen, Germany

The present work applies a bSSFP NCE 4D MRA sequence with a temporal window covering two cardiac cycles (2 RR intervals) and assesses quality and diagnosis performance in ten patients with arteriovenous malformation. The sequence achieves high temporal and spatial resolution, yielding high-quality images with improved depiction of arterial feeding, nidus size and venous drainage compared with DSA. The venous drainage was better depicted with 2-RR than with 1-RR NCE MRA, improving AVM hemorrhagic risk evaluation, without any trade-off for the nidus delineation quality.