Built-In Coil Current Sensing for 7-Tesla 1H/23Na and 1H/31P Magnetic Resonance Imaging

This article introduces two designs for dual-tuned built-in radio-frequency coil current sensing in 7-Tesla magnetic resonance imaging based on the current forcing property of the quarter-wave transmission line. The first design offers dual-tuned built-in coil current sensing at 1H/23Na resonant fre...

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Bibliographic Details
Published in:	Journal of Electromagnetic Engineering and Science Vol. 24; no. 2; pp. 120 - 128
Main Authors:	Abuelhaija, Ashraf, Saleh, Gameel, Issa, Samer, Nashwan, Osama, Salama, Sanaa
Format:	Journal Article
Language:	English
Published:	한국전자파학회JEES 31.03.2024 한국전자파학회
Subjects:	전자/정보통신공학 Magnetic Resonance Imaging Power Amplifier Radio Frequency Current Sensing Dual-Tuned
ISSN:	2671-7255, 2671-7263
Online Access:	Get full text
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Summary:	This article introduces two designs for dual-tuned built-in radio-frequency coil current sensing in 7-Tesla magnetic resonance imaging based on the current forcing property of the quarter-wave transmission line. The first design offers dual-tuned built-in coil current sensing at 1H/23Na resonant frequencies to probe the coil current consecutively at 298 MHz and 78.8 MHz, without the need for any integrated sensor on the coil. The second design enables dual-tuned built-in coil current sensing at 1H/31P resonant frequencies to probe the coil current at 298 MHz and 120 MHz consecutively. The first design achieved good matching (<-40 dB) and low insertion loss (<0.5 dB) for 1H and 23Na magnetic resonance signals. The 1H/31P design also exhibited good matching (<-30 dB) and low insertion loss (<0.67 dB). Therefore, both designs show promising potential for monitoring current flows in dual-tuned coils at the Larmor frequencies of different atomic nuclei.
ISSN:	2671-7255 2671-7263
DOI:	10.26866/jees.2024.2.r.211