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.
