Abstract #1640
Simultaneous Nyquist ghost and Geometric distortion correction based on reversed readout strategy in EPI
Victor B. Xie 1,2 , Adrian Tsang 1,2 , and Ed X. Wu 1,2
1
Laboratory of Biomedical Imaging and Signal
Processing, The University of Hong Kong, Hong Kong, Hong
Kong SAR, China,
2
Department
of Electrical and Electronic Engineering, The University
of Hong Kong, Hong Kong, Hong Kong SAR, China
Echo planar imaging (EPI) has been used in many
applications such as fMRI and DWI. However, EPI images
are prone to Nyquist ghost and geometric distortion.In
this study, we proposed a new scheme based on reversed
readout strategy to correct both Nyquist ghost and
geometric distortion artifacts on EPI images
simultaneously. We have demonstrated the proposed method
can effectively remove Nyquist ghost and correct
geometric distortion both in phantom and rat brain. This
method may be paticularly suited for dynamic EPI
protocols such as fMRI and dynamic contrast-enhanced MRI
applications.
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