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Abstract #2407

Evaluation of Chemical Shift Based Fat Suppression Using 2DRF Pulses

Rainer Schneider1, 2, Thorsten Speckner1, Jens Haueisen2, Josef Pfeuffer1

1Siemens Healthcare, Erlangen, Germany; 2Institute of Biomedical Engineering and Informatics, TU Ilmenau, Ilmenau, Germany

Custom-designed spatial spectral pulses (SPSP) have been shown to suppress fat signal effectively by taking advantage of chemical shift along the fast direction. However, the proper design of such SPSP pulses depends on many variables and their performance was never evaluated so far. In this work, a simplified implementation of this approach and a detailed performance evaluation is done. Reduced FOV diffusion-weighted images subject are acquired in phantom and human and compared to two other state-of-the-art fat suppression techniques. In conclusion, the proposed approach demonstrated here can offer the best compromise regarding residual fat signal and acquisition speed.

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Keywords

acquisition acquisitions actual adiabatic adjacent adjustment advantage affect analytically appropriate artifacts assess assuming bearing beyond biomedical blipped chemical common comparing compromise computing conducted contribution criterion custom depending depends design designed deviation diffusion dimensions displacement distance duration durations eddy effective efficiency engineering evaluated evaluation excitation excited excluded field former free frequency full furthermore general ghost goal good gradient hence human implementation in vivo influencing informatics inhomogeneities inspection institute inversion investigate lobes long longer lowest magnitude manually many matches mind minimal necessary need noise note object offer offset outperforms overlapping part performance phantom pixels planar prior process profile prone proper proposed pulse pulses realization recently reconstruction rectilinear reduce reduced reported required requires residual residuals resolution respect respectively reveal saturation scanner selected selective sensitive settings side significantly simplified slice solely spatial special spectral speed speeds spine subject subjects subsequent suitable suppression susceptibility table takes tends terms trajectory underlying unexcited untouched variables visible visual water yuan