Abstract #0680
B 0 Drift and Respiratory Motion Correction by Dual-Echo Susceptibility Correction (DESC)
Di Xu 1,2 , Steven M Shea 1,3 , Wesley D Gilson 1 , and Sunil G Patil 1
1
Center for Applied Medical Imaging, Imaging
and Computer Vision, Siemens Corporation, Corporate
Technology, Baltimore, Maryland, United States,
2
Department
of Biomedical Engineering, Johns Hopkins University,
School of Medicine, Baltimore, Maryland, United States,
3
Department
of Radiology, Stritch School of Medicine, Loyola
University Chicago, Maywood, IL, United States
A new B
0
correction
method known as Dual-Echo Susceptibility Correction (DESC)
for Echo-planar (EP) based magnetic resonance imaging
(MRI) is introduced. The proposed DESC method is
comprised of 1) an acquisition of two EPI echoes; 2)
modeling the susceptibility changes from B0 drift and
respiratory motion using a smoothing polynomial function
and 3) an iterative reconstruction framework to
accurately estimate B0 corrected data. The DESC method
is evaluated in an MR thermometry application as a proof
of concept. It is shown that the DESC method reduces B
0
drift
and respiratory motion-related inaccuracies, while being
computationally efficient.
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