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.
