Improvements in radio-frequency transmission for ultra-high field magnetic resonance imaging through a bilateral monopole antenna
- Authors
- Kim, Han-Joong; Heo, Phil; Han, Sang-Doc; Kim, Donghyuk; Song, Hyunwoo; Kim, Kyoung-Nam
- Issue Date
- 2018
- Publisher
- TAYLOR & FRANCIS INC
- Keywords
- Electromagnetic simulation; magnetic resonance imaging; radio-frequency coil
- Citation
- ELECTROMAGNETICS, v.38, no.5, pp.283 - 290
- Journal Title
- ELECTROMAGNETICS
- Volume
- 38
- Number
- 5
- Start Page
- 283
- End Page
- 290
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/5241
- DOI
- 10.1080/02726343.2018.1473141
- ISSN
- 0272-6343
- Abstract
- Inhomogeneous magnetic flux density under ultra-high field (UHF) magnetic resonance imaging (MRI) is mainly caused by a shortened RF wavelength propagating through a dielectric medium. Numerous studies on several types of traveling-wave antenna for UHF MRI are underway because of the potential alternative strategy of a large field of view with deeper penetration depth. In this study, a bilateral monopole antenna is proposed to improve RF transmission field (|B-1(+)|) uniformity at 297.2 MHz of 7 T. To investigate |B-1(+)| uniformity in this scenario, a bilateral monopole antenna is optimized by performing an electromagnetic simulation using a finite-difference time-domain method and improvements achieved using the optimized bilateral monopole antenna structure are discussed.
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