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Abstract #1839

Accelerating multi-contrast multidimensional motion-corrected non-Cartesian iterative reconstructions with the Toeplitz approach

Andrew Phair1, Gastao Cruz1, René Botnar1, and Claudia Prieto1
1School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom


Iterative reconstructions for multi-contrast multidimensional non-Cartesian MRI can require considerable computation time, with a large fraction dedicated to non-uniform fast Fourier transforms (NUFFTs). The Toeplitz approach has been previously shown to allow NUFFT operations to be replaced by computationally efficient fast Fourier transforms (FFTs) without loss of accuracy. Herein, we combine this approach with a 3D multi-contrast low-rank cardiac-motion-corrected radial reconstruction with low-rank patch-based regularisation to achieve a ~13.3-fold computational speed-up.

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