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. Author manuscript; available in PMC: 2013 Jun 7.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2011;2011:6997–7000. doi: 10.1109/IEMBS.2011.6091769

Fig. 1.

Fig. 1

Susceptibility-induced magnetic field inhomogeneity causes geometric distortions along the phase encoding direction of EPI scans: (a) and (b) axial slice of B0 images of a DTI sequence with right-to-left and posterior-to-anterior phase encoding directions, respectively. (c) is an undistorted high-resolution T2-weighted fast spin echo MRI used as anatomic reference, and (d) is the corresponding phase field map image.