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Abstract #1760

Spiral Deblurring Using B0 Maps with B0 Drift Correction

Melvyn B Ooi1,2, Dinghui Wang2, Ashley G Anderson III2, Zhiqiang Li2, Nicholas R Zwart2, Ryan K Robison2, and James G Pipe2

1Philips Healthcare, Cleveland, OH, United States, 2Imaging Research, Barrow Neurological Institute, Phoenix, AZ, United States

Spiral MRI enables long sampling durations but at the cost of increased sensitivity to B0-field fluctuations. For example, scanner B0-drift will be observed in spiral MRI as a time-varying component of image blurring. A spiral deblurring strategy is presented where a reference B0 map is acquired at the start of the spiral exam; F0 navigators then quickly measure B0 drift over the course of the spiral exam, and are used to calculate B0-drift corrected B0-maps for deblurring of the current scan. F0-navigator accuracy is verified with independent B0-map acquisitions, and improved spiral deblurring is shown for a structural brain scan.

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