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Abstract #0119

Turboprop+': Enhanced Turboprop DWI with a New Phase Correction

Chu-Yu Lee1, 2, Zhiqiang Li3, James G. Pipe2, Josef P. Debbins, 12

1Electrical Engineering, Arizona State University, Tempe, AZ, United States; 2Neuroimaging Research, Barrow Neurological Institute, Phoenix, AZ, United States; 3MR engineering, GE Healthcare, Waukesha, WI, United States

Compared with conventional (multishot FSE) DW-PROPELLER, Turboprop gives increased sampling efficiency, a wider self-navigated region, and reduced specific absorption rate (SAR) by incorporating the GRASE readout to collect gradient echoes around the primary spin-echo. However, phase errors using the GRASE readout, which are exacerbated with preceding large diffusion gradients, induce image artifacts in Turboprop. To mitigate this issue, X-prop and Steer-prop techniques have been proposed, which keep the gradient echoes encoded into separate blades. In this work, we introduced a method to correct the off-resonance phase in Turboprop, called Turboprop+. The results suggest that Turboprop+ has greater immunity to the artifacts from off-resonance phase, compared with X-prop.