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Abstract #2625

Cartesian Quasi-Random Sampling for Multiple Contrasts and Dynamic Imaging

Philipp Ehses1, Nicole Seiberlich2, Martin Blaimer3, Felix Breuer3, Wolfgang R. Bauer4, Peter M. Jakob1,3

1Dept. of Experimental Physics 5, Universitt Wrzburg, Wrzburg, Germany; 2Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, OH, USA; 3Research Center Magnetic Resonance Bavaria (MRB), Wrzburg, Germany; 4Dept. of Internal Medicine I, Universitt Wrzburg, Wrzburg, Germany

It has previously been shown that using random numbers to shuffle the phase encoding line order in dynamic MRI allows one to continuously update k-space in a non-orderly fashion. However, even a small set of random numbers may contain elements with very similar values. This observation has lead to the development of quasi-random numbers, which are designed to better obey the intended distribution. We propose a simple method for quasi-random shuffling of the phase encoding line order in Cartesian MRI and demonstrate its application on the example of a single-shot inversion-recovery TrueFISP experiment.