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Abstract #2385

Dark rim artifacts from motion in highly accelerated 3D cardiac perfusion imaging

Haonan Wang 1 , Neal Kepler Bangerter 1 , Eugene Kholmovski 2 , Meredith Ireene Taylor 1 , and Edward V.R DiBella 2

1 Department of Electrical & Computer Engineering, Brigham Young University, Provo, UT, United States, 2 Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, UT, United States

Dark rim artifacts are seen in first-pass myocardial perfusion imaging and impede accurate diagnosis of ischemia even when the image quality is otherwise reasonable. Gibbs ringing and cardiac motion are thought to be the main causes of dark rim artifacts for 2D multi-slice methods. New 3D acquisitions with high degrees of undersampling are starting to be used, but the longer readout may lead to more motion-related artifacts. In this study, we demonstrate that motion can create dark rim artifacts such as those observed in a highly-accelerated 3D acquisition. The artifacts depend on phase encode orderings and the timing of motion.

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