405-03-009 ISMRM Abstract

Calibration-free pTx-enabled 2D TSE at 7T: a scalable 2-spokes approach with assessment of the slice profile effect

Primary: Physics & Engineering - Parallel Transmit & Multiband

Secondary: Physics & Engineering - High-Field MRI

405-03-009 · Ultra-High Field Hardware and Systems · Tuesday, 12 May, 1:40 PM–3:30 PM · Ballroom West

Keywords: RF Pulse Design & Fields 7T PTx Turbo Spin-Echo (TSE) Universal pulse

Accepted

Anna Reitmann ^1,2, Joseph Brégeat¹, Franck Mauconduit¹, Jürgen Herrler³, Alexandre Vignaud¹, Aurélien Massire², Vincent Gras¹

¹CEA NeuroSpin, Paris-Saclay University, CNRS, Gif-Sur-Yvette, France

²Siemens Healthcare SAS, Courbevoie, France

³Siemens Healthineers AG, Erlangen, Germany

Presenting Author: Anna Reitmann

Synopsis

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References

1. Setsompop, K., Alagappan, V., Gagoski, B., Witzel, T., Polimeni, J., Potthast, A., ... & Adalsteinsson, E. Slice‐selective RF pulses for in vivo B inhomogeneity mitigation at 7 tesla using parallel RF excitation with a 16‐element coil. Magnetic Resonance in Medicine: An Official Journal of the International Society for Magnetic Resonance in Medicine, 2008; 60(6), 1422-1432. 10.1002/mrm.21739 [doi]

2. Tse, D. H., Wiggins, C. J., & Poser, B. A. High‐resolution gradient‐recalled echo imaging at 9.4 T using 16‐channel parallel transmit simultaneous multislice spokes excitations with slice‐by‐slice flip angle homogenization. Magnetic resonance in medicine, 2017; 78(3), 1050-1058 10.1002/mrm.26501 [doi]

3. Carr, H. Y., & Purcell, E. M. Effects of diffusion on free precession in nuclear magnetic resonance experiments. Physical review, 1954; 94(3), 630. 10.1103/PhysRev.94.630 [doi]

4. Yetisir, F., Poser, B. A., Grant, P. E., Adalsteinsson, E., Wald, L. L., & Guerin, B. Parallel transmission 2D RARE imaging at 7T with transmit field inhomogeneity mitigation and local SAR control. Magnetic resonance imaging, 2022; 93, 87-96. 10.1016/j.mri.2022.08.006 [doi]

5. Brégeat, J., Massire, A., Boulant, N., Gras, V., & Mauconduit, F. Joint design of a 90-180 spokes pulse in pTX for 2D TSE imaging at 11.7 Tesla. In Proc. Annual Meeting of the ISMRM 2025.

6. Zhang, M., & Rodgers, C. T. Scalable spokes pTx pulses for 2D turbo‐spin‐echo imaging at 7 T. Magnetic Resonance in Medicine, 2025. https://doi.org/10.1002/mrm.70068 [doi]

7. Hennig, J., & Scheffler, K. Hyperechoes. Magnetic Resonance in Medicine: An Official Journal of the International Society for Magnetic Resonance in Medicine, 2001; 46(1), 6-12. https://doi.org/10.1002/mrm.1153 [doi]

8. Gras, V., Vignaud, A., Amadon, A., Le Bihan, D., & Boulant, N. Universal pulses: a new concept for calibration‐free parallel transmission. Magnetic resonance in medicine, 2017; 77(2), 635-643 10.1002/mrm.26148 [doi]

9. Gras, V., Mauconduit, F., Vignaud, A., Amadon, A., Le Bihan, D., Stöcker, T., & Boulant, N. Design of universal parallel‐transmit refocusing kT‐point pulses and application to 3D T2‐weighted imaging at 7T. Magnetic Resonance in Medicine, 2018; 80(1), 53-65 10.1002/mrm.27001 [doi]

10. Wu, C. Y., Polimeni, J. R., & Cloos, M. A. Improved flip-angle uniformity in 0.35-mm slices using asymmetric pTx spoke pulses. In Proc. Annual Meeting of the ISMRM 2025.

11. Mauconduit, F., Gras, V., Vignaud, A., & Boulant, N. MetaPulse2D: methodology to enable universal slice specific spokes pulses in parallel transmission. In Proc. Annual Meeting of the ISMRM 2022.

Cite this abstract

http://echo.ismrm.org/p/ISMRM2026/405-03-009