Interleaved binomial k T -points for water-selective imaging at 7T.

Autor: Löwen D; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany., Pracht ED; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany., Stirnberg R; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany., Liebig P; Siemens Healthcare GmbH, Erlangen, Germany., Stöcker T; German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.; Department of Physics and Astronomy, University of Bonn, Bonn, Germany.
Jazyk: angličtina
Zdroj: Magnetic resonance in medicine [Magn Reson Med] 2022 Dec; Vol. 88 (6), pp. 2564-2572. Date of Electronic Publication: 2022 Aug 09.
DOI: 10.1002/mrm.29376
Abstrakt: Purpose: We present a time-efficient water-selective, parallel transmit RF excitation pulse design for ultra-high field applications.
Methods: The proposed pulse design method achieves flip angle homogenization at ultra-high fields by employing spatially nonselective INLINEMATH -points pulses were carried out and compared in terms of duration, homogeneity, fat suppression and pulse energy. For validation, in vivo MP-RAGE and 3D-EPI data were acquired.
Results: Simulation results show that interleaved binomial INLINEMATH -points pulses is demonstrated in vivo at 7T, confirming Bloch simulation results.
Conclusion: In this work, we present a time efficient and robust parallel transmission technique for nonselective water excitation with simultaneous flip angle homogenization at ultra-high field.
(© 2022 The Authors. Magnetic Resonance in Medicine published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.)
Databáze: MEDLINE
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