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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