Paul I Dubovan1,2, Jake J Valsamis1,2, and Corey A Baron1,2
1Medical Biophysics, Western University, London, ON, Canada, 2Center for Functional and Metabolic Mapping, Robarts Research Institute, London, ON, Canada
1Medical Biophysics, Western University, London, ON, Canada, 2Center for Functional and Metabolic Mapping, Robarts Research Institute, London, ON, Canada
Considering the time-varying behavior of eddy currents in a computational eddy current correction model results in improved image quality for an advanced diffusion MRI technique known as Oscillating Gradient Spin Echo.
FIG. 3. Quantitative assessment of eddy current correction quality
between FSL eddy only (FSL), our time-constant model (TCEDDY), our time-varying
model (TVEDDY), and field monitored eddy current correction (FM). For both PGSE
and OGSE acquisitions, the MSE was measured between all volumes with inverse
distortions of both subjects, normalized by the mean MSE of each subject
without correction, and averaged over all directions. Statistically significant
changes in MSE between adjacent correction techniques is indicated by *(p <
0.01).
FIG. 2. Qualitative comparison between eddy current corrupted OGSE
slice without correction, and after correction with FSL eddy, TCEDDY, TVEDDY,
and field monitored eddy current modelling. Yellow arrow: blurring artefact corrected
by modelling eddy current decay.
