Presurgical planning with fMRI benefits from increased reliability and the possibility to
reduce measurement time introduced by using ultra-high field. Echo-planar imaging suffers,
however, from geometric distortions which scale with field strength and potentially give rise
to clinically significant displacement of functional activation. We evaluate the effectiveness of
a dynamic distortion correction (DDC) method based on unmodified single-echo EPI in the
context of simulated presurgical planning fMRI at 7 T and compare it with static distortion …

Presurgical planning with fMRI benefits from increased reliability and the possibility to
reduce measurement time introduced by using ultra-high field. Echo-planar imaging suffers,
however, from geometric distortions which scale with field strength and potentially give rise
to clinically significant displacement of functional activation.