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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