PIN diode driver for NMR and MRI

Daniel Højrup Johansen*, Mohammed M. Albannay, J. R. Petersen, V. Zhurbenko, J. H. Ardenkjær-Larsen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Designing custom coils for magnetic resonance systems, such as nuclear magnetic resonance (NMR) spectrometers and magnetic resonance imaging (MRI) scanners, often entails using non-standard configurations of the transmit-receive (T/R) switch and Q-spoiling circuits. The built-in drivers of commercial NMR and MRI systems are, typically, only reconfigurable within a narrow application range (if at all). Thus, the built-in driver may not be able to properly control the custom T/R switches and Q-spoiling circuits when using custom built coils. We present a PIN diode driver which functions in both an MRI scanner and NMR spectrometer. The PIN diode driver is based on readily available discrete components and achieves switching times for the reverse and forward bias states (transmit on and off) of 2 μs and 0.4 μs respectively. Hence, this work enables a higher degree of customization of the RF switching circuits in an MR system and is potentially of interest for designers of custom coils for both NMR spectrometers and MRI scanners.
Original languageEnglish
JournalJournal of Magnetic Resonance
Volume300
Pages (from-to)114-119
ISSN1090-7807
DOIs
Publication statusPublished - 2019

Keywords

  • Active decoupling
  • Driver
  • MRI
  • NMR
  • PIN diode
  • Q-spoiling
  • Switch
  • TR switching

Cite this

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title = "PIN diode driver for NMR and MRI",
abstract = "Designing custom coils for magnetic resonance systems, such as nuclear magnetic resonance (NMR) spectrometers and magnetic resonance imaging (MRI) scanners, often entails using non-standard configurations of the transmit-receive (T/R) switch and Q-spoiling circuits. The built-in drivers of commercial NMR and MRI systems are, typically, only reconfigurable within a narrow application range (if at all). Thus, the built-in driver may not be able to properly control the custom T/R switches and Q-spoiling circuits when using custom built coils. We present a PIN diode driver which functions in both an MRI scanner and NMR spectrometer. The PIN diode driver is based on readily available discrete components and achieves switching times for the reverse and forward bias states (transmit on and off) of 2 {\^I}¼s and 0.4 {\^I}¼s respectively. Hence, this work enables a higher degree of customization of the RF switching circuits in an MR system and is potentially of interest for designers of custom coils for both NMR spectrometers and MRI scanners.",
keywords = "Active decoupling, Driver, MRI, NMR, PIN diode, Q-spoiling, Switch, TR switching",
author = "Johansen, {Daniel H{\o}jrup} and Albannay, {Mohammed M.} and Petersen, {J. R.} and V. Zhurbenko and Ardenkj{\ae}r-Larsen, {J. H.}",
year = "2019",
doi = "10.1016/j.jmr.2019.01.017",
language = "English",
volume = "300",
pages = "114--119",
journal = "Journal of Magnetic Resonance",
issn = "1090-7807",
publisher = "Elsevier",

}

PIN diode driver for NMR and MRI. / Johansen, Daniel Højrup; Albannay, Mohammed M.; Petersen, J. R.; Zhurbenko, V.; Ardenkjær-Larsen, J. H.

In: Journal of Magnetic Resonance, Vol. 300, 2019, p. 114-119.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - PIN diode driver for NMR and MRI

AU - Johansen, Daniel Højrup

AU - Albannay, Mohammed M.

AU - Petersen, J. R.

AU - Zhurbenko, V.

AU - Ardenkjær-Larsen, J. H.

PY - 2019

Y1 - 2019

N2 - Designing custom coils for magnetic resonance systems, such as nuclear magnetic resonance (NMR) spectrometers and magnetic resonance imaging (MRI) scanners, often entails using non-standard configurations of the transmit-receive (T/R) switch and Q-spoiling circuits. The built-in drivers of commercial NMR and MRI systems are, typically, only reconfigurable within a narrow application range (if at all). Thus, the built-in driver may not be able to properly control the custom T/R switches and Q-spoiling circuits when using custom built coils. We present a PIN diode driver which functions in both an MRI scanner and NMR spectrometer. The PIN diode driver is based on readily available discrete components and achieves switching times for the reverse and forward bias states (transmit on and off) of 2 μs and 0.4 μs respectively. Hence, this work enables a higher degree of customization of the RF switching circuits in an MR system and is potentially of interest for designers of custom coils for both NMR spectrometers and MRI scanners.

AB - Designing custom coils for magnetic resonance systems, such as nuclear magnetic resonance (NMR) spectrometers and magnetic resonance imaging (MRI) scanners, often entails using non-standard configurations of the transmit-receive (T/R) switch and Q-spoiling circuits. The built-in drivers of commercial NMR and MRI systems are, typically, only reconfigurable within a narrow application range (if at all). Thus, the built-in driver may not be able to properly control the custom T/R switches and Q-spoiling circuits when using custom built coils. We present a PIN diode driver which functions in both an MRI scanner and NMR spectrometer. The PIN diode driver is based on readily available discrete components and achieves switching times for the reverse and forward bias states (transmit on and off) of 2 μs and 0.4 μs respectively. Hence, this work enables a higher degree of customization of the RF switching circuits in an MR system and is potentially of interest for designers of custom coils for both NMR spectrometers and MRI scanners.

KW - Active decoupling

KW - Driver

KW - MRI

KW - NMR

KW - PIN diode

KW - Q-spoiling

KW - Switch

KW - TR switching

U2 - 10.1016/j.jmr.2019.01.017

DO - 10.1016/j.jmr.2019.01.017

M3 - Journal article

VL - 300

SP - 114

EP - 119

JO - Journal of Magnetic Resonance

JF - Journal of Magnetic Resonance

SN - 1090-7807

ER -