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Servo Navigation and Phase Equalization Enhanced by Run-Time Stabilization (PEERS) for 3D EPI Time Series
By Malte Riedel, Thomas Ulrich, Samuel Bianchi and 1 others.
Abstract
Purpose
To enhance time-resolved segmented imaging by synergy of run-time stabilization and retrospective data-driven phasecorrection.
Methods
A segmented 3D EPI sequence for fMRI time series is equipped with servo navigation based on short orbital navigatorsand a linear perturbation model, enabling run-time correction for rigid-body motion, bulk phase, and frequency fluctuations.Complementary retrospective phase correction is based on the repetitive structure of the time series and serves to address residualphase and frequency offsets. The combined approach is termed phase equalization enhanced by run-time stabilization (PEERS).
