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Abstract #2155

Optimisation of Poisson-disk Sampling Pattern for Highly Accelerated Femoral NCE-MRA

Hao Li1, Martin John Graves2, David John Lomas1, and Andrew Nicholas Priest2
1Department of Radiology, University of Cambridge, Cambridge, United Kingdom, 2Department of Radiology, Addenbrooke’s Hospital, Cambridge, United Kingdom

NCE-MRA techniques have a long acquisition time but can be accelerated by compressed sensing, parallel imaging and partial Fourier sampling using, for example, a Poisson-disk sampling pattern. In this study, we optimised the parameters in sampling pattern design with different acceleration factors for the 3D accelerated femoral fresh-blood-imaging sequence. The NCE-MRA data were reconstructed using weighted subtraction in k-space combined with phase correction. In a comparison using retrospective acceleration by subsampling of a full dataset, the optimised patterns outperformed the non-optimised patterns.

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