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Abstract #0293

Multi-Directional High Moment Encoded 3D PCMRA In-Vivo

MAGNA25Nicholas Ryan Zwart1, James Grant Pipe1

1Neuroimaging Research, Barrow Neurological Institute, Phoenix, AZ, United States

Signal to noise ratio gains in low VENC phase contrast MRI are limited by the ability to successfully unalias phase measurements that fall outside the -180 to 180 degree interval. A new time efficient acquisition and reconstruction method for unaliasing velocity encoded phase is compared to the well known 3-point (or dual-VENC) method in-vivo.

Keywords

ability acquisition additional adjusted aliased aliasing appear applied assuming axes axial back balancing basis bath bias biased brute characterize charge completely component components configuration consistency corrected determined distributed distribution duration effectively efficacy efficiency efficient equal error errors example exception excite experiment extends failure fall flow force forcing fully gains gamma gradient grant greater improve in vivo integer interval inversion known laminar limited magnitude matrix maximize measure measured measures minus moment multiplied mutual neighbors noise normalized orientations orthogonal output outside parallel peak phantom pipe pixel plus poss practical practice previously principle projected properly proposed reconstructed regular replacement representing repulsion respective respectively robust robustness sampled scaled sensitive sensitivity sets setup sign simulated simulations solution spatial spirals squared stack successfully supported surrounding system table terms theory typical uniformly unwrap vector vectors velocity vessel viability