Abstract #1314

19F imaging with physiologic motion using UTE sequence with randomized spokes ordering

Bijaya Thapa^1,2, Kyle Jeong^1,3, Insun Lee¹, and Eun-Kee Jeong^1,4

¹Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, UT, United States, ²Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, United States, ³Department of Biomedical Engeneering, Salt Lake City, UT, United States, ⁴Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, United States

3D radial, such as ultra-short TE (UTE) MRI, is insensitive to motion-related ghosting artifact, mainly because of heavy over-sampling at the k-space origin. However, using the smooth view ordering, of which direction of the readout gradient smoothly changes, any small portion of FID data with motion-corruption tends to be clustered, while directions of random view ordering are spread out over the entire 3D surface. In this work, we will compare the artifact induced by both motion and missing lines in 3D UTE MRI for smooth and random view orderings.

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