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Abstract #2836

Improved Temporal Resolution in Radial K-Space Sampling Using an Hourglass Filter

Maria Magnusson1,2, Olof Dahlqvist Leinhard2,3, Patrik Brynolfsson2,4, Peter Lundberg2,3

1Department of Electrical Engineering, Linkping University, Linkping, Sweden; 2Center for Medical Image Science and Visualization (CMIV), Linkping University, Linkping, Sweden; 3Department of Medical and Health sciences, Linkpings University, Linkping, Sweden; 4Radiation Sciences, Ume Universitet, Ume, Sweden

Using a radial sampling of k-space where consecutive profiles are separated by an angle δγ as close as possible to 180/(golden ratio), dynamic scans with high temporal resolution can be achieved. By using N profiles where N is a prime number, all profiles are updated before any profile is revisited, ensuring a completely filled k-space before any profile is re-sampled. Using a modified hourglass-shaped sliding window filter during reconstruction, oversampling near the origin can be used to significantly increase temporal resolution without compromising image quality.