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Abstract #2854

Preserving vessel conspicuity and contrast in local frequency maps by processing channel phase images prior to combination

Zahra Hosseini1, Junmin Liu2, and Maria Drangova3

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

Local frequency shift (LFS) mapping from multi-channel acquisition is traditionally performed with channel-combined data set prior to background field removal. In this work we utilize inter-echo variance channel combination to evaluate the effect of pre-channel combination (pre-CC) phase image processing on the quality of LFS maps. We compare our results with post-channel combination (post-CC) LFS maps. The results illustrate superior performance in the contrast of LFS maps resulting from pre-CC processing compared to the post-CC LFS maps. Several examples where vessel conspicuity is lost through post–CC processing but preserved through pre-CC processing are presented.

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