Mid-sagittal spiral MRI of speech production often suffers from a distinct and disruptive aliasing artifact arising from a spurious signal outside the FOV. In this work, we determine that the spurious signal is caused by gradient nonlinearity and an ineffective anti-aliasing filter in spiral readout. We propose and evaluate two methods to mitigate the artifact, termed the large FOV (LF) method and the estimation-subtraction (ES) method. Qualitative evaluation score from two speech experts using a 5-level Likert scale improved 1.25 and 1.35 with 228.8% and 6.9% increment of reconstruction time for the LF and ES methods, respectively.
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