Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026 · Cape Town, South Africa
468-05-015 ISMRM Abstract

Application of voxel-wise SAR efficiency as a metric to assess compatibility of novel materials in pTx systems.

Primary: Physics & Engineering - Non-Array RF Coils, Antennas & Waveguides
Secondary: Physics & Engineering - Hybrid & Novel Systems Technology
468-05-015 · Safety · Tuesday, 12 May, 4:00 PM–4:55 PM · Digital Posters Row I
Keywords: RF Arrays & Systems Metamaterials RF shimming Dielectric materials PTx compatibility
Accepted
Ignacio N López-Martínez 1,2, Thomas M Fiedler2,3,4,5, Rita Schmidt6, Mark E Ladd1,2,3, Stephan Orzada2
1Faculty of Physics and Astronomy, Heidelberg University, Heidelberg, Germany
2Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
3Faculty of Medicine, Heidelberg University, Heidelberg, Germany
4Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg, Germany
5Clinical Cooperation Unit Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
6Weizmann Institute of Science, Rehovot, Israel, Israel
Presenting Author: Ignacio N López-Martínez

Synopsis

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References

1. Webb A, Shchelokova A, Slobozhanyuk A, Zivkovic I, Schmidt R. Novel materials in magnetic resonance imaging: high permittivity ceramics, metamaterials, metasurfaces and artificial dielectrics. MAGMA. 2022;35(6):875-94. https://doi.org/10.1007/s10334-022-01007-5. [doi]
2. Grissom W, Yip CY, Zhang Z, Stenger VA, Fessler JA, Noll DC. Spatial domain method for the design of RF pulses in multicoil parallel excitation. Magn Reson Med. 2006;56(3):620-9. https://doi.org/10.1002/mrm.20978 [doi]
3. Cloos MA, Boulant N, Luong M, Ferrand G, Giacomini E, Le Bihan D, et al. kT -points: short three-dimensional tailored RF pulses for flip-angle homogenization over an extended volume. Magn Reson Med. 2012;67(1):72-80. https://doi.org/10.1002/mrm.22978 [doi]
4. Zelinski AC, Wald LL, Setsompop K, Goyal VK, Adalsteinsson E. Sparsity-enforced slice-selective MRI RF excitation pulse design. Ieee Transactions on Medical Imaging. 2008;27(9):1213-29. https://doi.org/10.1109/tmi.2008.920605 [doi]
5. Orzada S, Maderwald S, Poser BA, Johst S, Kannengiesser S, Ladd ME, et al. Time-interleaved acquisition of modes: an analysis of SAR and image contrast implications. Magn Reson Med. 2012;67(4):1033-41. https://doi.org/10.1002/mrm.23081 [doi]
6. Katscher U, Börnert P, Leussler C, van den Brink JS. Transmit SENSE. Magn Reson Med. 2003;49(1):144-50. https://doi.org/10.1002/mrm.10353 [doi]
7. Hubmann MJ, Nurzed B, Hansen SL, Kowal R, Schön N, Wenz D, et al. Reproducibility of Electromagnetic Field Simulations of Local Radiofrequency Transmit Elements Tailored for 7 T MRI. Sensors (Basel). 2025;25(6). https://doi.org/10.3390/s25061867 [doi]
8. Rupprecht S, Sica CT, Chen W, Lanagan MT, Yang QX. Improvements of transmit efficiency and receive sensitivity with ultrahigh dielectric constant (uHDC) ceramics at 1.5 T and 3 T. Magn Reson Med. 2018;79(5):2842-51. https://doi.org/10.1002/mrm.26943 [doi]
9. Koolstra K, Bornert P, Brink W, Webb A. Improved image quality and reduced power deposition in the spine at 3 T using extremely high permittivity materials. Magn Reson Med. 2018;79(2):1192-9. https://doi.org/10.1002/mrm.26721 [doi]
10. Lakshmanan K, Carluccio G, Walczyk J, Brown R, Rupprecht S, Yang QX, et al. Improved whole-brain SNR with an integrated high-permittivity material in a head array at 7T. Magn Reson Med. 2021;86(2):1167-74. https://doi.org/10.1002/mrm.28780 [doi]
11. Carluccio G, Collins CM. High-permittivity pads to enhance SNR and transmit efficiency in MRI of the heart at 7T: a simulation study. MAGMA. 2022;35(6):903-9. https://doi.org/10.1007/s10334-022-01018-2 [doi]

Cite this abstract

http://echo.ismrm.org/p/ISMRM2026/468-05-015