On the SNR of Cryogenic Receive Coils when using Room Temperature Preamplifiers

Daniel Højrup Johansen; Juan Diego Sanchez; Vitaliy Zhurbenko; Jan Henrik Ardenkjær-Larsen

On the SNR of Cryogenic Receive Coils when using Room Temperature Preamplifiers

Daniel Højrup Johansen, Juan Diego Sanchez, Vitaliy Zhurbenko, Jan Henrik Ardenkjær-Larsen

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Abstract

Significant increase of the signal-to-noise ratio (SNR) is possible by cooling receive coils to cryogenic temperatures, if they are not highly sample noise dominated. Conventionally, the noise of the preamplifier is excluded leading to an overestimation of the achievable SNR gain. In this work, we show that for the case of a small-animal birdcage coil for ¹³C at 3T cooled with liquid nitrogen to 77K, the SNR is overestimated by approximately 40% if the effect of the room temperature preamplifier is excluded. Hence, the preamplifier should either be included in the SNR gain estimation or cooled with the coil.

Original language	English
Publication date	2019
Number of pages	3
Publication status	Published - 2019
Event	ISMRM 27th Annual Meeting & Exhibition - Palais des congrès de Montréal, Montréal, Canada Duration: 11 May 2019 → 16 May 2019 Conference number: 27 http://www.ismrm.org/19m/

Conference

Conference	ISMRM 27th Annual Meeting & Exhibition
Number	27
Location	Palais des congrès de Montréal
Country/Territory	Canada
City	Montréal
Period	11/05/2019 → 16/05/2019
Internet address	http://www.ismrm.org/19m/

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title = "On the SNR of Cryogenic Receive Coils when using Room Temperature Preamplifiers",

abstract = "Significant increase of the signal-to-noise ratio (SNR) is possible by cooling receive coils to cryogenic temperatures, if they are not highly sample noise dominated. Conventionally, the noise of the preamplifier is excluded leading to an overestimation of the achievable SNR gain. In this work, we show that for the case of a small-animal birdcage coil for 13C at 3T cooled with liquid nitrogen to 77K, the SNR is overestimated by approximately 40% if the effect of the room temperature preamplifier is excluded. Hence, the preamplifier should either be included in the SNR gain estimation or cooled with the coil.",

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TY - ABST

T1 - On the SNR of Cryogenic Receive Coils when using Room Temperature Preamplifiers

AU - Johansen, Daniel Højrup

AU - Sanchez, Juan Diego

AU - Zhurbenko, Vitaliy

AU - Ardenkjær-Larsen, Jan Henrik

N1 - Conference code: 27

PY - 2019

Y1 - 2019

N2 - Significant increase of the signal-to-noise ratio (SNR) is possible by cooling receive coils to cryogenic temperatures, if they are not highly sample noise dominated. Conventionally, the noise of the preamplifier is excluded leading to an overestimation of the achievable SNR gain. In this work, we show that for the case of a small-animal birdcage coil for 13C at 3T cooled with liquid nitrogen to 77K, the SNR is overestimated by approximately 40% if the effect of the room temperature preamplifier is excluded. Hence, the preamplifier should either be included in the SNR gain estimation or cooled with the coil.

AB - Significant increase of the signal-to-noise ratio (SNR) is possible by cooling receive coils to cryogenic temperatures, if they are not highly sample noise dominated. Conventionally, the noise of the preamplifier is excluded leading to an overestimation of the achievable SNR gain. In this work, we show that for the case of a small-animal birdcage coil for 13C at 3T cooled with liquid nitrogen to 77K, the SNR is overestimated by approximately 40% if the effect of the room temperature preamplifier is excluded. Hence, the preamplifier should either be included in the SNR gain estimation or cooled with the coil.

M3 - Conference abstract for conference

T2 - ISMRM 27th Annual Meeting & Exhibition

Y2 - 11 May 2019 through 16 May 2019

ER -

On the SNR of Cryogenic Receive Coils when using Room Temperature Preamplifiers

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