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Abstract #0882

Optimizing the fixed angular increment between k-space spokes can lead to improved SNR in radial imaging

S Sophie Schauman1, Thomas W Okell1, and Mark Chiew1
1Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Many dynamic MRI methods use golden ratio radial sampling. Here, we show that golden ratio sampling is not always ideal from an SNR point of view, and that optimizing the fixed angular increment between spokes can lead to more uniform coverage of k-space, which in turn can lead to lower g-factors in a non-Cartesian parallel imaging reconstruction. The method we present, the Set Increment with Limited Views Encoding Ratio method, SILVER, maintains the flexibility of reconstructing a single dataset at multiple temporal resolutions but improves SNR compared with the golden ratio method.

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