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Abstract #4162

Reduction of Eddy-Current-Induced Distortion in Diffusion-Weighted EPI Using Spin-Tagging

Kun Zhou1, Wei Liu1

1Siemens (Shenzhen) Magnetic Resonance Ltd., Shenzhen, Guangdong, China

A spin-tagging based method is proposed to correct eddy currents induced distortions in DW-EPI images. In this method strips placed by tagging pulses are used to characterize image distortion. Parameters (scaling and shifting factors) describing distortion are derived by comparing strip images of distorted image and reference image (image with b = 0). After that pixel shifting map is calculated using these parameters and used to perform distortion correction.