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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: Magn Reson Med. 2018 Jul 29;81(1):258–274. doi: 10.1002/mrm.27381

FIG. 8.

FIG. 8

Impact of FIDnav-based retrospective correction of abrupt motion in Subject 1. Sagittal and axial slices through 3D FLASH images are shown (from left to right) with no voluntary motion, uncorrected image with abrupt motion, and with retrospective motion compensation using the EM tracking and FIDnav motion estimates. NRMSE and SSIM indices, relative to the reference scan, are also shown. FIDnav-based correction of abrupt head motion results in a comparable increase in both qualitative image quality and quantitative metrics, relative to ground-truth correction with EM tracking motion measurements.