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Abstract #4500

Velocity-Selective Magnetization-Prepared Non-Contrast-Enhanced Cerebral MR Angiography at 3T

Qin Qin 1,2 , Taehoon Shin 3 , Michael Schar 1 , Hua Guo 4 , and Ye Qiao 1

1 Radiology, Johns Hopkins University, Baltimore, Maryland, United States, 2 Kirby Center, Kennedy Krieger Institute, Baltimore, Maryland, United States, 3 Radiology, University of Maryland, Baltimore, Maryland, United States, 4 Center for Biomedical Imaging Research, Biomedical Engineering, Tsinghua University, Beijing, China

The new velocity-selective saturation (VSS) pulse train, by embedding a pair of composite pulses for refocusing in each k-segment and phase cycling applied over consecutive k-segments, offers improved robustness to B0/B1 inhomogeneity in the brain at 3T. Velocity-selective magnetization-prepared non-contrast-enhanced cerebral MR angiography was demonstrated on healthy volunteers. Compared with TOF MRA, VSS prepared MRA depicted more distal branches of cerebral arteries and allowed for the whole-brain coverage without the requirement of section positioning orthogonal to the direction of flow.

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