Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026 · Cape Town, South Africa
451-01-009 / 451-01-009 ISMRM Abstract

Monitoring and Correction of RF Transmission Nonlinearities in MRF-based B1+ mapping at 7T

Primary: Acquisition & Reconstruction - Artifacts and Correction Strategies
Secondary: Physics & Engineering - System Imperfections
451-01-009 · Parallel Transmission at High Fields · Tuesday, 12 May, 8:20 AM–9:56 AM · Power Pitch Theatre 1
451-01-009 · Parallel Transmission at High Fields · Tuesday, 12 May, 8:20 AM–9:56 AM · Power Pitch Theatre 1
Keywords: MR Fingerprinting RF Arrays & Systems System Imperfections: Measurement & Correction PTx B1 Mapping
Accepted
Max Lutz 1, Frank Seifert1, Sebastian Schmitter1,2,3
1Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Berlin, Germany
2Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, United States of America
3Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
Presenting Author: Max Lutz

Synopsis

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References

1. Vannesjo SJ, Haeberlin M, Kasper L, et al. Gradient system characterization by impulse response measurements with a dynamic field camera. Magn Reson Med. 2013;69(2):583-593. doi:10.1002/mrm.24263 [doi]
2. Landes VL, Nayak KS. Iterative correction of RF envelope distortion with GRATER‐measured waveforms. Magn Reson Med. 2020;83(1):188-194. doi:10.1002/mrm.27930 [doi]
3. Çavuşoğlu M, Dietrich BE, Brunner DO, Weiger M, Pruessmann KP. Correction of parallel transmission using concurrent RF and gradient field monitoring. Magn Reson Mater Phys Biol Med. 2017;30(5):473-488. doi:10.1007/s10334-017-0620-5 [doi]
4. Stang PP, Kerr A, Grissom W, Pauly JM, Scott GC. Vector Iterative Pre-Distortion: An Auto-calibration Method for Transmit Arrays. In: Proceedings of the 17th Annual Meeting of ISMRM. Honolulu, Hawaii, USA; 2009:395.
5. Aghaeifar A, Bosch D, Heule R, et al. Intra-scan RF power amplifier drift correction. Magn Reson Med. 2024;92(2):645-659. doi:10.1002/mrm.30078 [doi]
6. Lutz M, Silemek B, Seifert F, et al. Impact of RF imperfections on MRF-based and reference B1+ mapping methods with a commercial 1Tx/32Rx head coil. In: Proceedings of the 32nd Annual Meeting of ISMRM. Singapore; 2024:0473.
7. Lutz M, Aigner CS, Flassbeck S, et al. B1-MRF: Large dynamic range MRF-based absolute B1+ mapping in the human body at 7T. Magn Reson Med. 2024;92(6):2473-2490. doi:10.1002/mrm.30242 [doi]
8. Seifert F, Wübbeler G, Junge S, Ittermann B, Rinneberg H. Patient safety concept for multichannel transmit coils. J Magn Reson Imaging. 2007;26(5):1315-1321. doi:10.1002/jmri.21149 [doi]
9. Seifert F, Pfeiffer H, Mekle R, Waxmann P, Ittermann B. 7T 8-channel pTx head coil with high B1+ efficiency optimized for MRS. In: Proceedings of the 24th Annual Meeting of ISMRM. Singapore; 2016:3545. https://cds.ismrm.org/protected/16MProceedings/PDFfiles/3545.html. Accessed June 19, 2025.
10. Jiang Y, Ma D, Seiberlich N, Gulani V, Griswold MA. MR fingerprinting using fast imaging with steady state precession (FISP) with spiral readout. Magn Reson Med. 2015;74(6):1621-1631. doi:10.1002/mrm.25559 [doi]

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http://echo.ismrm.org/p/ISMRM2026/451-01-009