Novel Half Fourier Reconstruction Recovering Signal Loss from Off-resonance
Seul Lee1 and Gary Glover2
1Department of Electrical Engineering, Stanford University, Stanford, CA, United States, 2Department of Radiology, Stanford University, Stanford, CA, United States
Since half k-space reconstruction reduces scan time while
keeping spatial resolution, it can be used for T2* weighted images such as
functional MRI that requires fairly long TE. Functional MRI is sensitive
to off-resonance because there exist large susceptibility variations in
air-tissue interfaces such as sinuses. Existing half k-space reconstruction is
vulnerable to off-resonance since it might lose most of the image energy when
there is a large amount of phase shift. In this study, we suggest a new half
k-space reconstruction method that is more robust to off-resonance compared to
existing reconstruction method.
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