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 Markl^4,5, and Sebastian Schmitter^1,3

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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