Meeting Banner
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.

Abstract PDF Presentation Video

Keywords

absorption allows around artifacts assigned assuming axis barrow benefits blade blades bulk calibration called central collect concatenated concatenation consistent correct correction creating decrease depiction diameter diffusion echoes effectively efficiency electrical encoded engineering enhanced errors even exacerbated exhibited fewer gives gradient gradients greater healthy immunity implemented improvement incorporating induce institute introduced isotropic issue keep larger lobes loss makes maps matrix measure measured minimal minimized minor mitigate mitigated motion navigated neurological outer phoenix pipe preceding primarily primary prop propeller proposed pulse readout reconstruction reduced remaining remove removed retain sampling scanner schemes self sensitivity separate since slices slowly space spin steer subsequent suggest temporal turbo turboprop varies volunteer wider width