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Abstract #3787

Phase Dispersion from Steady-State Signal Behavior in Phase-Sensitive Multiband Imaging with Application to MREIT

Guita Banan1, Munish Chauhan2, Manish Amin1, Sudhir Ramanna3, Zahra Hosseini4, Essa Yacoub3, Michael Schär5, Thomas H Mareci1, and Rosalind J Sadleir2
1Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, United States, 2School of Biological and Health System Engineering, Arizona State University, Tempe, AZ, United States, 3University of Minnesota, Minneapolis, MN, United States, 4MR R&D Collaboration, Siemens Medical Solutions USA, Atlanta, GA, United States, 5Department of Radiology, Johns Hopkins University, Baltimore, MD, United States

Incorporating multiband excitation into phase-sensitive imaging introduces distortions in the phase measurements. We used simulations and phantom images to show that a previously unreported phase dispersion problem arises within multiband-slice phase maps. We show that this problem can be understood in terms of the steady-state signal behavior and propose imaging protocols to resolve it. Human scans using these protocols show minimal phase dispersion. We are adopting this protocol for our studies of phase-sensitive magnetic resonance electric impedance tomography (MREIT).

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