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Abstract #4723

Time-Resolved MRA Using Radial Multi-Echo Sequence and Sliding Window Reconstruction

Hyun Jong Jeong1, Saurabh Shah2, Christopher S. Eddleman3, John Sheehan4, James Carr4, Timothy John Carroll1,4

1Biomedical Engineering, Northwestern University, Chicago, IL, USA; 2Siemens Medical Solutions, Chicago, IL; 3Neurological Surgery, Northwestern University, Chicago, IL, USA; 4Radiology, Northwestern University, Chicago, IL, USA

We introduce a technique to decrease the actual acquisition time to decrease the temporal footprint and achieve true acceleration for time-resolved MRA by taking multiple echoes per TR, acquiring a full 3D volume in 7 seconds without parallel imaging. Combined with radial sliding window reconstruction, we obtained time resolved MRA with frame rates comparable to clinical X-Ray DSA, resulting in complete separation of arterial and venous phases. The technique has been verified in flow phantoms as well as volunteers and patients in vivo.