Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 유형석 | - |
dc.date.accessioned | 2022-12-06T04:38:17Z | - |
dc.date.available | 2022-12-06T04:38:17Z | - |
dc.date.issued | 2021-05 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v. 69, NO. 5, Page. 2686-2696 | en_US |
dc.identifier.issn | 0018-9480;1557-9670 | en_US |
dc.identifier.uri | https://ieeexplore.ieee.org/document/9358238 | en_US |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/178019 | - |
dc.description.abstract | In ultrahigh field magnetic resonance imaging (MRI) using a static magnetic field over 7 T, the inhomogeneity in the time-varying magnetic field ( B1), which is caused by its short wavelength, is mitigated by using a multichannel radio frequency (RF) coil as an antenna. However, the conventional multichannel RF coil has a fixed configuration; consequently, its transmit efficiency (TE) changes according to the head shape of the patient. In this study, a geometrically adjustable eight-channel RF transmitter head coil for 7-T MRI was proposed. All resonators and supporting structures (called bridges) in the coil have interlocking teeth at their sides, allowing each channel to adjust its geometric location according to the head shape of the patient. Scenarios for conventional and proposed coils in three different configurations were simulated and compared in terms of the transmitted component of the B1 field ( B+ 1 field) and specific absorption rate (SAR) maps. The simulation results indicate that, for a given configuration and head shape, the TE of the proposed coil was higher than that of the conventional coil, while the SAR efficiency remained unchanged. Furthermore, the S-parameter matrix of the proposed coil and the measured B1 field produced by the two channels facing each other show that the proposed coil resonates at 298 MHz with acceptable mutual coupling and effectively improves the B1 field intensity. Moreover, the obtained signal-to-noise ratio (SNR) maps and magnetic resonance (MR) images prove that the proposed coil is an efficient candidate for an RF transmitter or transceiver head coil used in 7-T MRI. | en_US |
dc.description.sponsorship | This work was supported by the National Research Foundation of Korea funded by Ministry of Education, Science and Technology through the Basic Science Research Program under Grant 2019R1A2C2004774. | en_US |
dc.language | en | en_US |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | en_US |
dc.subject | Radio frequency | en_US |
dc.subject | Head | en_US |
dc.subject | Magnetic resonance imaging | en_US |
dc.subject | Shape | en_US |
dc.subject | Magnetic heads | en_US |
dc.subject | Resonators | en_US |
dc.subject | Shape measurement | en_US |
dc.subject | Adjustable coil | en_US |
dc.subject | magnetic resonance imaging (MRI) | en_US |
dc.subject | radio frequency (RF) coil | en_US |
dc.subject | 7 T | en_US |
dc.subject | transmitter head coil | en_US |
dc.title | Adjustable RF Transmitter Head Coil: Improving Transmit Efficiency With SAR Management for 7-T Magnetic Resonance Imaging | en_US |
dc.type | Article | en_US |
dc.relation.no | 5 | - |
dc.relation.volume | 69 | - |
dc.identifier.doi | 10.1109/TMTT.2021.3057620 | en_US |
dc.relation.page | 2686-2696 | - |
dc.relation.journal | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | - |
dc.contributor.googleauthor | Cho, Youngdae | - |
dc.contributor.googleauthor | Basir, Abdul | - |
dc.contributor.googleauthor | Yoo, Hyoungsuk | - |
dc.sector.campus | S | - |
dc.sector.daehak | 공과대학 | - |
dc.sector.department | 바이오메디컬공학전공 | - |
dc.identifier.pid | hsyoo | - |
dc.identifier.orcid | https://orcid.org/0000-0001-5567-2566 | - |
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