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Abstract #3390

Evaluation of Off-Resonance Correction with and Without an Acquired Field Map in Variable-Density Contrast Enhanced Spiral Perfusion Imaging

Christopher Sica1, Matt Restivo2, Chris Kramer3, Craig Meyer2, Michael Salerno3

1Radiology, Pennsylvania State University, Hershey, PA, United States; 2Biomedical Engineering, University of Virginia, Charlottesville, VA, United States; 3Cardiology, University of Virginia, Charlottesville, VA, United States

Off-resonance correction removes spiral-related blurring artifacts. Usually a collected field map is required, lowering the efficiency of data collection. Time sensitive applications would benefit from an automatic deblurring algorithm that does not require an acquired field map. This work compares the performance of a field map based semi-automatic (SA) deblurring technique with full automatic (FA) technique and a standard gridding reconstruction (UC), in the context of spiral stress perfusion imaging. A blinded evaluation of images from 8 subjects yielded mean scores of 3.9 (UC), 4.2 (SA) and 4.3 (FA) (p=0.2), with a trend towards automatic reconstruction (FA/SA) being superior to UC (p=0.14).