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Abstract #1637

Effects of phase error on image reconstruction for simultaneous multi-slice readout-segmented diffusion MRI

SeyyedKazem HashemizadehKolowri1, Rong-Rong Chen1, Edward V. R. DiBella1,2,3, Edward W. Hsu3, Leslie Ying4, and Ganesh Adluru2

1ECE, University of Utah, SALT LAKE CITY, UT, United States, 2Radiology and Imaging Sciences, University of Utah, SALT LAKE CITY, UT, United States, 3Bioengineering, University of Utah, SALT LAKE CITY, UT, United States, 4Biomedical Engineering, The State University of New York (SUNY) at Buffalo, Buffalo, NY, United States

In this work, we study the effect of phase errors on the quality of image reconstructions for simultaneous multi-slice (SMS) readout-segmented echo planar imaging (RS-EPI) acquisitions. We propose an iterative split slice-GRAPPA (I-SSG) algorithm to train improved kernels using estimated diffusion weighted images (DWIs) rather than baseline images. Results from stroke patients show that the proposed I-SSG algorithm produces consistently better reconstructions than the SSG algorithm in the presence of baseline phase errors.

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Abstract