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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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