Abstract #0621

Fully Integrated Scanner Implementation of Direct Signal Control for 2D T2-Weighted TSE at Ultra-High Field

Raphael Tomi-Tricot^1,2,3, Jan Sedlacik^2,3, Jonathan Endres⁴, Juergen Herrler⁵, Patrick Liebig⁶, Rene Gumbrecht⁶, Dieter Ritter⁶, Tom Wilkinson^2,3, Pip Bridgen⁷, Sharon Giles⁷, Armin M. Nagel⁴, Joseph V. Hajnal^2,3, Radhouene Neji^1,2, and Shaihan J. Malik^2,3

¹MR Research Collaborations, Siemens Healthcare Limited, Frimley, United Kingdom, ²Biomedical Engineering Department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, ³Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, ⁴Institute of Radiology, University Hospital Erlangen, Erlangen, Germany, ⁵Institute of Neuroradiology, University Hospital Erlangen, Erlangen, Germany, ⁶Siemens Healthcare GmbH, Erlangen, Germany, ⁷School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom

Direct Signal Control (DSC) uses parallel transmission (pTx) with more flexibility than conventional static RF shimming to tackle RF inhomogeneity at ultra-high field in fast spin echo (FSE) sequences by varying complex weights of successive RF pulses independently along the refocusing train. Also, unlike other dynamic pTx methods, it preserves RF pulse properties and sequence timing. This work demonstrates the applicability of DSC in routine conditions for neuroimaging, with minimal workflow disruption. In-vivo T2-weighted FSE results exhibit higher signal and better homogeneity when using DSC over RF shimming, while explicitly ensuring safe operation.

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