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Abstract #5072

Weisskoff Stability Metrics Dependence on K-Space Trajectory

E. Brian Welch1,2, Ad Moerland3, Elizabeth A. Moore3, J. Christopher Gatenby1, John C. Gore1

1Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, United States; 2MR Clinical Science, Philips Healthcare, Highland Heights, OH, United States; 3MR Clinical Science, Philips Healthcare, Best, Netherlands

Measurement of an MR scanners signal stability is important for clinical and research sites acquiring data known to be adversely affected by system instabilities such as functional MRI. In particular, the Weisskoff plot and its associated radius of decorrelation (RDC) metric are often used to compare systems. The RDC is known to be influenced by the noise level of the data. However, it has not been widely reported that the observed RDC is also affected by k-space trajectory. Here we present stability measurements from a single scanner collected using four distinct k-space acquisition trajectories: Cartesian, multivane (propeller), spiral and radial.