Abstract #4073

Simultaneous multi-slice 23Na imaging using radial CAIPIRINHA

Marco L. Wittrich^1,2, Armin M. Nagel^1,3, Sebastian Schmitter^1,4, Peter Bachert^1,2, Mark E. Ladd^1,2,5, and Fabian J. Kratzer^1,2

¹Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, ²Faculty of Physics and Astronomy, University of Heidelberg, Heidelberg, Germany, ³University Hospital Erlangen, Institute for Radiology, Friedrich‐Alexander‐Universität Erlangen‐Nürnberg (FAU), Erlangen, Germany, ⁴Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany, ⁵Faculty of Medicine, University of Heidelberg, Heidelberg, Germany

Synopsis

Keywords: High-Field MRI, Non-Proton, 23Na,SMS,radial CAIPIRINHAIn this work, a simultaneous multi-slice (SMS) approach using radial CAIPIRINHA was implemented for sodium MRI. Initial experiments were confined to two simultaneously excited slices. Here, simulated and measured slice profiles agreed well with expectations. Further, the SNR of the acquired SMS images was analyzed and compared to reference measurements of the individual slices. An SNR increase of up to 38% when maintaining flip angle and up to 13% for constant SAR was observed. Lastly, in-vivo head images (2.9x2.9x12mm³) were obtained showing the feasibility of ²³Na SMS MRI.

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