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Abstract #1387

Robust k-space trajectory mapping with data readout concatenation and automated phase unwrapping reference point identification

E. Brian Welch1,2,3, Ryan K. Robison4, and Kevin D. Harkins2,3

1Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, United States, 2Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, United States, 3Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 4Neuroimaging Research, Barrow Neurological Institute, Phoenix, AZ, United States

A fundamental challenge when mapping k-space trajectories that require unwrapping of phase proportional to position in k-space is the accrual of phase during gradient prewinders and phase encodes, which are not sampled. To overcome this challenge, we present a simple method using data readout concatenation and automated phase unwrapping reference point identification to robustly map a broad range of trajectories. This approach works for any k-space trajectory for which data readouts can be connected to provide a path crossing near the center of k-space from which 1D phase unwrapping can be performed.

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