Abstract #1760

Spiral Deblurring Using B0 Maps with B0 Drift Correction

Melvyn B Ooi^1,2, 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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