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Sensors
Volume 25
Issue 13
10.3390/s25134021
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Communication

Simulation Design of an Elliptical Loop-Microstrip Array for Brain Lobe Imaging with an 11.74 Tesla MRI System †

by
Daniel Hernandez
1,
Taewoo Nam
1,
Eunwoo Lee
2,
Yeji Han
3,
Yeunchul Ryu
4,
Jun-Young Chung
5,* and
Kyoung-Nam Kim
3,*
1
Neuroscience Research Institute, Gachon University, Incheon 21988, Republic of Korea
2
Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Republic of Korea
3
Department of Biomedical Engineering, Gachon University, Seongnam 13120, Republic of Korea
4
Department of Radiological Science, Gachon University, Incheon 21999, Republic of Korea
5
Department of Neuroscience, College of Medicine, Gachon University, Incheon 21565, Republic of Korea
*
Authors to whom correspondence should be addressed.
†
This article is a revised and expanded version of a paper entitled Elliptical Loop-Microstrip Array for Focus Brain Lobe Imaging with 11.74 Tesla MRI System, which was presented at the 2024 IEEE 21st Biennial Conference on Electromagnetic Field Computation (CEFC), Jeju, Korea, 2–5 June 2024.
Sensors 2025, 25(13), 4021; https://doi.org/10.3390/s25134021 (registering DOI)
Submission received: 3 May 2025 / Revised: 25 June 2025 / Accepted: 26 June 2025 / Published: 27 June 2025
(This article belongs to the Special Issue Advanced Biomedical Imaging and Signal Processing)
Versions Notes

Abstract

Magnetic resonance imaging (MRI) is a powerful medical imaging technique used for acquiring high-resolution anatomical and functional images of the human body. With the development of an 11.74 Tesla (T) human MRI system at our facility, we are designing novel radiofrequency (RF) coils optimized for brain imaging at ultra-high fields. To meet specific absorption rate (SAR) safety limits, this study focuses on localized imaging of individual brain lobes rather than whole-brain array designs. Conventional loop coils, while widely used, offer limited |B1|-field uniformity at 500 MHz—the Larmor frequency at 11.74 T, which can reduce image quality. Therefore, it is important to develop antennas and coils for highly uniform fields. As an alternative, we propose an elliptical microstrip design, which combines the compact resonant properties of microstrips with the enhanced field coverage provided by loop geometry. We simulated a three-element elliptical microstrip array and compared its performance with a conventional loop coil. The proposed design demonstrated improved magnetic field uniformity and coverage across targeted brain regions. Preliminary bench-top validation confirmed the feasibility of resonance tuning at 500 MHz, supporting its potential for future high-field MRI applications.
Keywords: electromagnetic simulations; magnetic fields; microstrip; MRI electromagnetic simulations; magnetic fields; microstrip; MRI

Share and Cite

MDPI and ACS Style

Hernandez, D.; Nam, T.; Lee, E.; Han, Y.; Ryu, Y.; Chung, J.-Y.; Kim, K.-N. Simulation Design of an Elliptical Loop-Microstrip Array for Brain Lobe Imaging with an 11.74 Tesla MRI System. Sensors 2025, 25, 4021. https://doi.org/10.3390/s25134021

AMA Style

Hernandez D, Nam T, Lee E, Han Y, Ryu Y, Chung J-Y, Kim K-N. Simulation Design of an Elliptical Loop-Microstrip Array for Brain Lobe Imaging with an 11.74 Tesla MRI System. Sensors. 2025; 25(13):4021. https://doi.org/10.3390/s25134021

Chicago/Turabian Style

Hernandez, Daniel, Taewoo Nam, Eunwoo Lee, Yeji Han, Yeunchul Ryu, Jun-Young Chung, and Kyoung-Nam Kim. 2025. "Simulation Design of an Elliptical Loop-Microstrip Array for Brain Lobe Imaging with an 11.74 Tesla MRI System" Sensors 25, no. 13: 4021. https://doi.org/10.3390/s25134021

APA Style

Hernandez, D., Nam, T., Lee, E., Han, Y., Ryu, Y., Chung, J.-Y., & Kim, K.-N. (2025). Simulation Design of an Elliptical Loop-Microstrip Array for Brain Lobe Imaging with an 11.74 Tesla MRI System. Sensors, 25(13), 4021. https://doi.org/10.3390/s25134021

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