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Abstract #0094

Cyclic Continuous Max-Flow: Phase Processing Using the Inherent Topology of Phase

John Stuart Haberl Baxter1, Zahra Hosseini1, Junmin Liu2, Maria Drangova3, and Terry M Peters1

1Biomedical Engineering Graduate Program, Western University, London, ON, Canada, 2Imaging Laboratories, Robarts Research Institute, London, ON, Canada, 3Department of Medical Biophysics, Western University, London, ON, Canada

Tissue susceptibility differences manifest in MR phase images as high-frequency changes in an otherwise smooth phase background. Two paradigms currently exist for isolating these changes: one involves phase unwrapping followed by filtering; the other involves filtering the complex signal. Both rely on a linear topology, which can result in artifacts such as phase wraps and shadowing, as phase is inherently cyclic. This paper introduces the cyclic continuous max-flow (CCMF) method, which uses optimization over a cyclic topology to process phase information. More robust field maps are generated using this approach compared to the traditional paradigms.

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