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Abstract #2406

Improved Single-Pass Dual Echo Dixon Imaging with Ramp Sampling and Flexible Echo Times

Ken-Pin Hwang1, 2, Olen Rambow2, Ersin Bayram3, John D. Hazle2, John E. Madewell4, Zachary W. Slavens5, Anthony T. Vu5, Jingfei Ma2

1Global Applied Science Laboratory, General Electric Healthcare, Houston, TX, United States; 2Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, TX, United States; 3Global Applied Science Laboratory, GE Healthcare, Houston, TX, United States; 4Department of Radiology, University of Texas MD Anderson Cancer Center, Houston, TX, United States; 5MR Engineering, General Electric Healthcare, Waukesha, WI, United States

Errors in conventional two-point fat-water separation methods may occur when acquired echo times deviate far from those expected by the separation algorithm. Single-pass, dual-echo sequences are particularly vulnerable when pursuing high resolution at higher field strengths, where the increased frequency shift of lipid demands shorter echo times and echo spacings. This study alleviates this resolution limitation by extending the sampling window to the ramps of the readout pulses and freeing the echo time constraints with a flexible TE algorithm. With this combined method, we demonstrate improved spatial resolution while also improving the overall scan efficiency the sequence.

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Keywords

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