Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026 · Cape Town, South Africa
569-01-005 ISMRM Abstract

Two-Dimensional accelerated Spatial Encoding using only RF field gradients with SGS-FREE

Primary: Acquisition & Reconstruction - Pulse Sequence Design and Spatial Encoding Methods
Secondary: Acquisition & Reconstruction - Signal Modeling
569-01-005 · Signal Modeling and Signal Preparation: Novel Approaches · Wednesday, 13 May, 8:20 AM–9:15 AM · Digital Posters Row J
Keywords: Pulse Sequence Design RF Pulse Design & Fields Mid-field MRI Parallel Transmission (pTx) B1 Encoding
Accepted
PARKER J JENKINS1,2,3, Daniel C Pizetta 3,4, Lance DelaBarre1, Michael Mullen3, Efrain Torres3, Brooklynn Dobson1, Angela Teeple1, Sai Abitha Srinivas3, Mateus J Martins5,6, Edson Vidoto5,6, Breno H Da Silva6, Andre F Rodrigues6, Gregor Adriany1, Ben Parkinson7, Michael Garwood1
1Center for Magnetic Resonance Research, Dept. of Radiology, University of Minnesota, Minneapolis, United States of America
2Biomedical Engineering, University of Minnesota, Minneapolis, United States of America
3Adialante LLC, Minneapolis, United States of America
4Sao Carlos Institute of Physics, University of Sao Paulo, IFSC – USP, Sao Carlos, Brazil
5University of Sao Paulo, Ribeirao Preto, Brazil
6Centro de Imagens e Espectroscopia por Ressonância Magnética, University of Sao Paulo, Ribeirao Preto, Brazil
7Robinson Research Institute, Victoria University, Wellington, New Zealand
Presenting Author: Daniel C Pizetta

Synopsis

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References

1. Torres E, Froelich T, Wang P, DelaBarre L, Mullen M, Adriany G, Pizetta DC, Martins MJ, Vidoto ELG, Tannús A, Garwood M. B1 -gradient-based MRI using frequency-modulated Rabi-encoded echoes. Magn Reson Med. 2022 Feb;87(2):674-685. doi: 10.1002/mrm.29002. Epub 2021 Sep 9. PMID: 34498768; PMCID: PMC8627437. [doi] [pmid]
2. Froelich, T., et al., Fast spin-echo approach for accelerated B1 gradient–based MRI. Magnetic Resonance in Medicine, 2023. 89(6): p. 2204-2216. doi: 10.1002/mrm.29592 [doi]
3. Wang, P., et al., Correcting image distortions from a nonlinear B1+-gradient field in frequency-modulated Rabi-encoded echoes. Magnetic Resonance in Medicine, 2022. 89(5): p. 2100-2108. doi: 10.1002/mrm.29549 [doi]
4. Lee Y, Han Y, Park H, Watanabe H, Garwood M, Park J. New phase-based B1 mapping method using two-dimensional spin-echo imaging with hyperbolic secant pulses. Magn Reson Med. 2015;73:170-181. doi: 10.1002/mrm.25110 [doi]
5. Mullen M, Garwood M. Contemporary approaches to high-field magnetic resonance imaging with large field inhomogeneity. Prog Nucl Mag Res Sp. 2020;120-121:95-108. doi:10.1016/j.pnmrs.2020.07.003 [doi]
6. Garwood, M. and L. DelaBarre, The return of the frequency sweep: designing adiabatic pulses for contemporary NMR. J Magn Reson, 2001. 153(2): p. 155-77. doi: 10.1006/jmre.2001.2340 [doi]
7. Pizetta, D. C., Mullen, M., Jenkins, P., Vidoto, E. L. G., Martins, M. J., Tannús, A., Garwood, M., & Torres, E. Achieving 2D sub-millimeter images using Phase-Encoded Frequency-modulated Rabi Encoded Echoes in a B0 gradientless inhomogeneous 0.5T magnet. in ISMRM Annual Meeting & Exhibition (2025). doi:10.58530/2025/2612 [doi]
8. Jenkins, P. J. B., Wu, X., Adriany, G., & Garwood, M. Sequential Gradient Superposition (SGS) FREE. in ISMRM Annual Meeting & Exhibition (2023). doi:10.58530/2023/0304. [doi]
9. B Parkinson*, K Bouloukakis, H W Weijers, J Olatunji, M Szmigiel, M W Hunter, T Froelich, J Bailey and M Garwood. Design and manufacture of an ultra-compact, 1.5 T class, controlled-contact resistance, REBCO, brain imaging MRI magnet. Supercond. Sci. Technol. 37 115026. doi: 10.1088/1361-6668/ad80d5 [doi]
10. Theilenberg S, Shang Y, Ghazouani J, Kumaragamage C, Nixon TW, McIntyre S, Vaughan JT, Parkinson B, Garwood M, de Graaf RA, Juchem C. Design and realization of a multi-coil array for B0 field control in a compact 1.5T head-only MRI scanner. Magn Reson Med. 2023 Sep;90(3):1228-1241. doi: 10.1002/mrm.29692. [doi]
11. Martins MJ, Vidoto ELG, Tannús A. inventors; Universidade de São Paulo, assignee. Espectrômetro para uso em sistemas de ressonância magnética e sistemas de ressonância magnética. Patent No. BR102015000624-1. 2015.
12. Silva DMDD, Pizetta DC, Lourenço GV, Vidoto ELG, Martins MJ & TannúsA Magnetic resonance system configuration and editing tools. In Proceedings of the IUPESM World Congress on Medical Physics & Biomedical Engineering, Toronto, CA, 2015. p.667–668.
13. Pizetta DC, Shimada DHT, Falvo M, et al., inventors. PyMR—a framework for programming magnetic resonance systems. Brazil Software Registry No. BR512019001829-0. 2017.
14. Pizetta DC. PyMR: A Framework for Programming Magnetic Resonance Systems. PhD thesis. Instituto de Física de São Carlos; 2018. DOI: 10.11606/T.76.2019.tde-06052019-103714. [doi]

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http://echo.ismrm.org/p/ISMRM2026/569-01-005