Junmin Liu1, David A. Rudko1, 2, Joseph S. Gati1, Ravi S. Menon1, 2, Maria Drangova1, 2
1Imaging Research Laboratories, Robarts research Institution, The University of Western Ontario, London, Ontario, Canada; 2Department of Medical Biophysics, The University of Western Ontario, London, Ontario, Canada
We present a new phase unwrapping algorithm, which uses an orthogonal recursive approach (PUROR) to remove streaks that result following conventional 2D phase unwrapping. The performance of the proposed technique is evaluated with a set of volunteer brain images acquired at 7 T, and the results are compared with those unwrapped using the PhiUN and PRELUDE algorithms. The PUROR algorithm is shown to represent a robust and rapid (less than 1 s per slice) phase unwrapping approach for application in high-field and high-resolution susceptibility mapping and offers improved phase unwrapping at the brain/cortex edge.
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