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Abstract #4898

Dynamic Auto-calibrated Multiband CAIPIRINHA: proof of principle and application to cardiac tissue phase mapping

Giulio Ferrazzi1, Jean Pierre Bassenge1, Clarissa Wink1, Johannes Mayer1, Anthony N. Price2, Steen Moeller3, Pierre-François Van de Moortele3, Alexander Ruh4, Michael Markl4,5, and Sebastian Schmitter1,3

1Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany, 2Centre for the Developing Brain, Department of Perinatal Imaging & Health, Division of Imaging Sciences & Biomedical Engineering, King´s College London, London, United Kingdom, 3Department of Radiology, Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, 4Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States, 5Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Chicago, IL, United States

In conventional multiband CAIPIRINHA, an additional reference scan is acquired to allow the separation of the simultaneously excited slices. In this study, an acquisition-reconstruction method that makes use of the multiband data itself to calculate this reference scan is presented. The immediate implication is that the full multiband acceleration can be exploited. In addition, since the reference data has the same resolution and phase structure to multiband (i.e. it is the same data), improved slice separation is achieved. The method was implemented starting from a 2D CINE phase-contrast MR sequence, and it was used to assess velocities in the myocardium in two subjects scanned at 3T.

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