Abstract #0647
Nyquist Ghosting Correction For Simultaneous Multislice Echo Planar Imaging
Kangrong Zhu 1 , Robert F. Dougherty 1 , Atsushi M. Takahashi 2 , John M. Pauly 1 , and Adam B. Kerr 1
1
Stanford University, Stanford, CA, United
States,
2
Athinoula
A. Martinos Imaging Center at MIT, McGovern Institute
for Brain Research, MIT, MA, United States
In simultaneous multislice (SMS) EPI the ghosting
artifacts cannot be accurately corrected in each
individual slice if the correction is performed
independently of the slice unaliasing. In this work a
SMS acquisition is represented as a 3D k-space
acquisition, where the k
x
dimension
is fully sampled and the k
y
-k
z
plane
is undersampled. Eddy current effects that lead to the
ghosting artifacts are treated as part of the encoding
matrix, allowing both slice unaliasing and eddy current
effects to be simultaneously and accurately corrected
for with the proposed matrix-decoding method. Parallel
imaging reconstruction is also incorporated in the
proposed method.
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