Pulse sequences for phase-contrast SSFP imaging from a single steady-state
Nayak K, Nielsen J
University of Southern California
Steady-state phase contrast (SSPC) imaging achieves rapid flow measurements with high phase-signal-to-noise-ratio . However, due to the sensitivity of SSFP to eddy-current-induced phase variations from one TR to the next, two separate steady states are typically established (one for each value of the gradient first moment). This produces phase-contrast measurement errors in regions where the two images are not in perfect spatial alignment, and requires careful switching between the two steady states. We introduce two approaches to SSPC imaging from a single steady-state: (1) gradient inversion within a single TR, and (2) interleaved SSPC imaging using ""VENC pairing"".