Meeting Banner
Abstract #1882

Diffusion-Prepared Single-Shot Fast Spin-Echo Imaging and the Effects of Eddy Currents: Preliminary Investigation

Valentina Taviani1, Jean H. Brittain2, Bruce D. Collick3, Diego Hernando1, Nathan S. Artz1, Scott B. Reeder1, 4

1Department of Radiology, University of Wisconsin, Madison, WI, United States; 2Applied Science Laboratory, GE Healthcare, Madison, WI, United States; 3GE Healthcare, Waukesha, WI, United States; 4Department of Medical Physics, University of Wisconsin, Madison, WI, United States

Diffusion-prepared (DP) fast spin-echo (FSE) techniques could potentially produce distortion-free, diffusion-weighted images with high SNR and high resolution. However, the large diffusion-sensitizing gradients applied during the preparation can produce eddy-current-induced phase shifts at the time of magnetization tip-up, resulting in an unwanted modulation of the transverse magnetization. In this work we demonstrate the improved eddy current properties of a twice-refocused diffusion preparation scheme when compared to previously reported once-refocused preparations and we show preliminary phantom data obtained with a DP single-shot FSE technique and the twice-refocused diffusion-encoding scheme.

Abstract PDF Poster PDF

Keywords

acceptable acquisition aimed aligned although amplitudes applications applied artifacts avoid axes axial axis bipolar body bottom breast cancellation channel coil column contrast convention converted created development diffusion dimensional distribution drop dual eddy encode encoded encoding evaluation fast generate gill good gradient gradients hemes hold hows idea induced isotropic jean least limits longitudinal loss magnetization makes maps matrix maxim medical middle minimal modulation module motivated occur pared patent phantom physical physics pipe played plied potential preliminary prep preparation preparations prepared previous produce produces properties pulse pulses quadrature readout reeder refocused refocusing reported residua return scheme schemes selective sensitive serious sets sett shot slew slice slices spatial spherical spin subtracting transform tube turn twice ultimately uniform unwanted valuated yielded