Abstract #3518

Optimization-Based Simultaneous Combination and Unwrapping for MR Phase Imaging

John S H Baxter^1,2, Zahra Hosseini^1,2, Olivia W Stanley^1,3, Ravi S Menon^1,3, Maria Drangova^1,2,3, and Terry M Peters^1,2,3

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

MRI phase allows for the extraction of inherent tissue contrasts arising from differences in magnetic susceptibility. However, in order to enhance signal-to-noise ratio and accelerate acquisition, modern MRI uses multiple receiver coils. Extracting susceptibility information relies on combining phase information from these multiple channels. Once combined, phase unwrapping beyond the [$$$-\pi$$$, $$$\pi$$$] range allows for further processing and visualization. These processes can be sensitive to noise and errors which are compounded during serial processing, motivating more robust integrated algorithms. This paper introduces simultaneous combination and unwrapping (SCAU) that simultaneously estimates channel phase offset images and a combined unwrapped image.

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