Abstract #0066

High Temporal-Resolution Three-Directional Velocity Measurements in a Single Breath-Hold Using EPI and Direct Inversion

Ning Jin¹, Rizwan Ahmad², Yu Ding², Sven Zuehlsdorff³, Orlando P. Simonetti²,⁴

¹Siemens Healthcare, Columbus, OH, United States; ²Davis Heart & Lung Research Institute, The Ohio State University, Columbus, OH, United States; ³Siemens Healthcare, Chicago, IL, United States; ⁴Department of Department of Internal Medicine, The Ohio State University, Columbus, OH, United States

A novel echo-planar (EPI) implementation of balanced four-point velocity encoded PC-MRI for rapid, breath-hold acquisition of three-directional velocity data with high temporal resolution is presented. A direct inversion with regularized least square estimation of velocities from the acquired phase data is used to increase temporal resolution by a factor of four. The combined approach enables simultaneous measurements of vx, vy, and vz with an effective temporal resolution of 14.5 ms within a single breath-hold.