2D 23Na imaging using half-VERSE pulses
Marco L. Wittrich1,2, Armin M. Nagel1,3, Sebastian Schmitter1,4, Peter Bachert1,2, Mark E. Ladd1,2,5, and Fabian J Kratzer1,2
1Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 2Faculty of Physics and Astronomy, University of Heidelberg, Heidelberg, Germany, 3Institute of Radiology, University Hospital Erlangen, Friedrich‐Alexander‐Universität Erlangen‐Nürnberg (FAU), Erlangen-Nürnberg, Germany, 4Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany, 5Faculty of Medecine, University of Heidelberg, Heidelberg, Germany
In this work, a 2D radial 23Na sequence with half-VERSE pulses was developed to reduce SAR and achieve ultra-short TEs. Simulations and measurements of the slice profiles showed good agreement between full- and half-VERSE pulses with a maximal deviation in the FWHM of 7%.
In measurements, the TEmin was reduced from 1.41ms to 0.1ms by the use of half- instead of full-VERSE pulses. This resulted in an SNR gain of up to 18% in phantom, 7% in brain and 26% in calf measurements.
Last, rapid single-slice 23Na images (2.9x2.9x12mm3) were obtained in a clinically feasible acquisition time of 2:56min.
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