A method for macroscopic B0 field inhomogeneity compensated SWI using 3D z-shim multi-echo GRE
Dongyoeb Han 1 , Yoonho Nam 1 , Sung-Min Gho 1 , and Dong-Hyun Kim 1
Yonsei University, Seoul, Korea
Susceptibility weighted imaging based on GRE provides
enhancement of susceptibility difference which is useful
for visualization of vein, micro-hemorrhage and iron
deposition. However, GRE suffers from the macroscopic B0
inhomogeneity due to air/tissue boundary and this effect
is shown as SNR loss both in magnitude and phase. Here,
an improved algorithm for B0 field inhomogeneity
compensated SWI, applicable to both magnitude and phase,
is proposed using the 3D z-shim mGRE sequence.
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