Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026 · Cape Town, South Africa
462-06-014 ISMRM Abstract

Static and dynamic parallel transmit pulse design for a 4Tx/16Rx breast coil array at 7T

Primary: Physics & Engineering - RF Pulse Design & Fields
Secondary: Physics & Engineering - High-Field MRI
462-06-014 · Breast MRI: Technical Developments · Tuesday, 12 May, 4:55 PM–5:50 PM · Digital Posters Row C
Keywords: Breast 7T Ultra-high field RF Pulse Design Parallel Transmission (pTx)
Accepted
Nico Egger 1, Laurent Ruck1, Sophia Nagelstraßer1, Jürgen Herrler2, Andreas K Bitz3, Titus Lanz4, Michael Uder1, Sebastian Bickelhaupt1, Armin M NAGEL1,5
1Institute of Radiology, University Hospital Erlangen (UKER), Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
2Siemens Healthineers AG, Erlangen, Germany
3Electrical Engineering and Information Technology, University of Applied Sciences - FH Aachen, Aachen, Germany
4RAPID Biomedical, Rimpar, Germany
5Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
Presenting Author: Nico Egger

Synopsis

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References

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3. Grimm J, Aigner CS, Dietrich S, et al. In Vivo 3D Liver Imaging at 7 T Using kT-Point pTx Pulses and a 32-Tx-Channel Whole-Body Radiofrequency Coil Array. NMR Biomed 2025;38. https://doi.org/10.1002/nbm.70170 [doi]
4. Van de Moortele P-F, Ugurbil K. Very fast multi channel B1 calibration at high field in the small flip angle regime. In Proceedings of the 17th Annual Meeting of ISMRM, Honolulu, HI, 2009. p. 367.
5. Egger N, Ruck L, Nagelstraßer S, et al. Evaluation of an interleaved acquisition scheme for improved robustness of channel‐wise relative B1+ mapping at 7 T. Magn Reson Med 2025. https://doi.org/10.1002/mrm.70101 [doi]
6. Yarnykh VL. Actual flip-angle imaging in the pulsed steady state: a method for rapid three-dimensional mapping of the transmitted radiofrequency field. Magn Reson Med 2007;57:192-200. https://doi.org/10.1002/mrm.21120 [doi]
7. Dietrich S, Aigner CS, Kolbitsch C, et al. 3D Free-breathing multichannel absolute B1+ Mapping in the human body at 7T. Magn Reson Med 2021;85:2552-2567. https://doi.org/10.1002/mrm.28602 [doi]
8. Nagel AM, Laun FB, Weber MA, et al. Sodium MRI using a density-adapted 3D radial acquisition technique. Magn Reson Med 2009;62:1565-1573. https://doi.org/10.1002/mrm.22157 [doi]
9. Egger N, Nagelstraßer S, Wildenberg S, et al. Accelerated B1+ mapping and robust parallel transmit pulse design for heart and prostate imaging at 7 T. Magn Reson Med 2024;92:1933-1951. https://doi.org/10.1002/mrm.30185 [doi]
10. Schmitter S, Wu X, Adriany G, et al. Cerebral TOF angiography at 7T: Impact of B1 (+) shimming with a 16-channel transceiver array. Magn Reson Med 71, 966–977 (2013). https://doi.org/10.1002/mrm.24749 [doi]
11. Cloos M, Boulant N, Luong M, et al. kT‐points: short three‐dimensional tailored RF pulses for flip‐angle homogenization over an extended volume. Magn Reson Med 2012;67:72-80. https://doi.org/10.1002/mrm.22978 [doi]
12. Leitão D, Tomi-Tricot R, Bridgen P, et al. Parallel transmit pulse design for saturation homogeneity (PUSH) for magnetization transfer imaging at 7T. Magn Reson Med 88.1 (2022): 180-194. https://doi.org/10.1002/mrm.29199 [doi]
13. Majewski K, Simultaneous optimization of radio frequency and gradient waveforms with exact Hessians and slew rate constraints applied to kT-points excitation. J Magn Reson. Med. 326:106941. https://doi.org/10.1016/j.jmr.2021.106941 [doi]

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http://echo.ismrm.org/p/ISMRM2026/462-06-014