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Abstract #1041

Reducing scan time for full MRI examination of the ankle by 45% while maintaining diagnostic value using combined compressed sensing and parallel imaging.

Onno Baur1, Chiel Den Harder1, Robert Hemke1, Mario Maas1, Farood Faridmojtahedi2, Elwin De Weerdt3, Maarten Versluis3, Mascha Van Der Kwaak1, and Aart Nederveen2

1Radiology & Nuclear medicine, Academic Medical Center, Amsterdam, Netherlands, 2Radiologie, Academic Medical Center, Amsterdam, Netherlands, 3Healthcare, Philips, Best, Netherlands

Dixon imaging is a well-known imaging technique that provides robust water-fat separation but requires relatively long acquisition times. We scanned twelve healthy volunteers with a standard ankle examination containing multiple Dixon sequences and an accelerated examination using CS-SENSE, a combination of Parallel Imaging and Compressed Sensing. A five-point Likert scale was used to compare reference images to CS-SENSE images. Although using CS-SENSE caused a slight SNR reduction, the diagnostic value was not impaired. Applying CS-SENSE on an ankle examination protocol resulted in a feasible reduction of the total acquisition time by 45% from 13’38” to 7’49”, without losing diagnostic value.

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