Abstract #2654

Gibbs Ringing Correction for non-Cartesian Acquisitions

Jeffery Wong^1,2,3, Santiago Coelho^1,2, Hong-Hsi Lee^4,5, Jingjia Chen^1,2, Li Feng^1,2, Els Fieremans^1,2, and Dmitry S. Novikov^1,2

¹Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, ²Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, ³Department of Biomedical Engineering, New York University, Brooklyn, NY, United States, ⁴Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States, ⁵Department of Radiology, Harvard Medical School, Boston, MA, United States

Synopsis

Keywords: Artifacts, Artifacts

Motivation: Truncation in k-space leads to Gibbs ringing. Removal of Gibbs artifact for non-Cartesian isotropic sampling remains unaddressed.

Goal(s): To develop Gibbs ringing correction method for non-Cartesian isotropic k-space readouts.

Approach: We generalize the subvoxel-shift Gibbs ringing correction to isotropic sampling schemes.

Results: The developed correction removes Gibbs ringing for isotropic sampling schemes.

Impact: Gibbs ringing leads to artifacts and biases in parametric maps, especially in diffusion MRI. We generalize the subvoxel-shift Gibbs ringing correction, previously developed for cartesian EPI acquisitions, to non-Cartesian sampling. The method will increase the reproducibility of MRI processing pipelines.

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