Abstract #0031
Prephased O-space Imaging for Reduction of Asymmetrical Local K-space Coverage
Leo K. Tam 1 , Gigi Galiana 1 , Haifeng Wang 1 , Emre Kopanoglu 1 , Andrew Dewdney 2 , Dana C. Peters 1 , and R. Todd Constable 1
1
Diagnostic Radiology, Yale University, New
Haven, CT, United States,
2
Siemens
Healthcare AG, Erlangen, Bavaria, Germany
Local k-space, the spatial derivative of the encoded
phase has been used to visualize and design strategies
to mitigate the spatially-varying encoding of nonlinear
gradient encoding. To reduce the local k-space asymmetry
of O-space imaging, the phase prior to readout is
adjusted for each readout in a technique called
prephasing, first proposed by Gallichan et. al.
Prephased O-space imaging shows reduced MSE, though
artifacts from previous simulations of asymmetrical
k-space were not corroborated. Parallel receiver
information may sufficiently localize signal conditional
on appropriate imaging parameters.
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