Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026 · Cape Town, South Africa
368-03-010 ISMRM Abstract

Compact 4 MHz GaN RF Power Amplifier with Digital Phase Correction for Distributed Parallel Transmit at Low Field

Primary: Physics & Engineering - Low-Field MRI
Secondary: Physics & Engineering - RF Arrays & Systems
368-03-010 · Low Field Systems and Applications · Monday, 11 May, 1:50 PM–2:45 PM · Digital Posters Row I
Keywords: Portable systems RF power amplifier B1 gradient B0-gradient-free GaN Power Systems
Accepted
Reid Bolding1,2, Christopher Vaughn 3, Jacob Hannan4, Jessie EP Sun1, William A Grissom3, Mark Griswold1,2,5,6,7
1Department of Radiology, Case Western Reserve University, Cleveland, United States of America
2Department of Radiology, University Hospitals, Cleveland, United States of America
3Case Western Reserve University, Cleveland, United States of America
4Department of Physics, Case Western Reserve University, Cleveland, United States of America
5Department of Biomedical Engineering, Case Western Reserve University, Cleveland, United States of America
6University Hospitals Cleveland Medical Center, Cleveland, Ohio, United States of America
7Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, Ohio, United States of America
Presenting Author: Christopher Vaughn

Synopsis

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References

1. C. E. Vaughn, N. R. Bolding, M. A. Griswold, and W. A. Grissom, "Selective Encoding through Nutation and Fingerprinting (SENF): 1D Experimental Validation on a 47.5 mT Low-Field Scanner", in Proceedings of the 31st Meeting of the International Society for Magnetic Resonance in Medicine (2022). doi:10.58530/2022/0371 [doi]
2. C. E. Vaughn, N. R. Bolding, M. A. Griswold, and W. A. Grissom, “Selective Encoding through Nutation and Fingerprinting (SENF) using Quadratic RF Phase Modulation and the Bloch-Siegert Shift,” in Proceedings of the 2023 Meeting of the International Society for Magnetic Resonance in Medicine (2023) doi:10.58530/2023/1101 [doi]
3. L. L. Wald, P. C. McDaniel, T. Witzel, J. P. Stockmann, and C. Z. Cooley, "Low‐cost and portable MRI", en, Journal of Magnetic Resonance Imaging 52, 686–696 (2020). doi:10.1002/jmri.26942 [doi]
4. A. Samardzija, K. Selvaganesan, H. Z. Zhang, H. Sun, C. Sun, Y. Ha, G. Galiana, and R. T. Constable, "Low-Field, Low-Cost, Point-of-Care Magnetic Resonance Imaging", en, Annual Review of Biomedical Engineering 26, 67–91 (2024). doi:10.1146/annurev-bioeng-110122-022903 [doi]
5. N. Gudino, J. A. Heilman, M. J. Riffe, O. Heid, M. Vester, and M. A. Griswold, "On-coil multiple channel transmit system based on class-D amplification and pre-amplification with current amplitude feedback: On-Coil Current-Mode Parallel Transmit System", en, Magnetic Resonance in Medicine 70, 276–289 (2013). doi:10.1002/mrm.24462 [doi]
6. S. L. Colino, R. A. Beach, and EPC-Co, Fundamentals of Gallium Nitride Power Transistors, App Note: AN002, en, 2020.
7. N. R. Bolding, Chris Vaughn, Aria Patel, Snow Lin, Andrew Dupuis, William A Grissom, and Mark A Griswold, “Digital Synthesis at the Coil in a WiFi-enabled Modular Switch Mode RFPA Platform for Gradient-Free Imaging,” in Proceedings of the 2023 Meeting of the International Society for Magnetic Resonance in Medicine (2023) doi:10.58530/2023/1067 [doi]
8. N. R. Bolding, Christopher Vaughn, Aria Patel, Snow Lin, Andrew Dupuis, William A Grissom, and Mark A Griswold, "Three-Channel Modular Transmit Array for RF Gradient MRI: Enabling Low-Cost, Scalable RF Arrays Through Active Decoupling" in Proceedings of the 2025 Meeting of the International Society for Magnetic Resonance in Medicine (2025) doi:10.58530/2025/3306 [doi]
9. J. B. Martin, S. A. Srinivas, C. E. Vaughn, H. Sun, M. A. Griswold, and W. A. Grissom, "Selective excitation localized by the Bloch–Siegert shift and a B1+ gradient", Magnetic Resonance in Medicine 88, 1081–1097 (2022). doi:10.1002/mrm.29271 [doi]

Cite this abstract

http://echo.ismrm.org/p/ISMRM2026/368-03-010