Work

Discretely Dielectric-Material Coated Dipole Antenna: Enhanced Tuning and Electric Field Reduction for Safety at 300 MHz

Year: 2025

Type: conference-paper

Abstract: Motivation: Dipole antennas struggle with imaging small regions at 300 MHz due to their reliance on physical length for tuning, which limits resolution. Goal(s): This study aims to develop a discretely dielectric-material-coated (DDMC) dipole antenna for dipole-length-independent frequency tuning, improving imaging quality and safety. Approach: We designed and constructed discretely dielectric-material-coated dipole antenna and compared the DDMC design with fractionated dipole designs using simulations and bench-testing, employing a high-dielectric-material to achieve 300 MHz resonance without altering physical dimensions. Results: The DDMC dipole provided a more uniform B1+ distribution and lower electric fields, demonstrating superior decoupling and a higher Q-factor for enhanced ultra-high-field MRI performance. Impact: This research advances ultra-high-field MRI technology by enhancing imaging quality and safety through innovative dipole antenna designs. Future studies can explore optimized dielectric materials, improving access to high-resolution imaging in clinical settings and benefiting patients with complex anatomical needs.

Source: Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition

DOI: 10.58530/2025/4266

Authors: Aditya Bhosale, Yunkun Zhao, Komlan Payne, Leslie Ying, Xiaoliang Zhang

Institution: University at Buffalo, State University of New York

Language: English

Topic: Antenna Design and Analysis

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: green

Funder: National Institute of Biomedical Imaging and Bioengineering