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Abstract #2941

Improved Conjugate-Gradient Phase Correction Algorithm for Multi-Shot DWI

Zhang J, Moseley M, Liu C
Stanford University, Stanford University

SNAILS image reconstruction by using CG method is more susceptible to physiological artifacts than SENSE due to worse system condition. We present an improved algorithm (ICG) here by introducing an additional phase correction stage into the original algorithm. By evaluating the performance of both algorithms at various degrees of motion and signal to noise ratio (SNR), we demonstrate that ICG increases both image quality and converging speed significantly. According to the simulation results, the image quality is increased almost independent of SNR, while the improvement in the converging speed is more significant at higher SNR.