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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Vydáno v:Journal of Electromagnetic Engineering and Science Ročník 24; číslo 2; s. 120 - 128
Hlavní autoři: Abuelhaija, Ashraf, Saleh, Gameel, Issa, Samer, Nashwan, Osama, Salama, Sanaa
Médium: Journal Article
Jazyk:angličtina
Vydáno: 한국전자파학회JEES 31.03.2024
한국전자파학회
Témata:
전자/정보통신공학
Magnetic Resonance Imaging
Power Amplifier
Radio Frequency
Current Sensing
Dual-Tuned
ISSN:2671-7255, 2671-7263
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Popis
Shrnutí: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