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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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 languageEnglish
Publication date2019
Number of pages3
Publication statusPublished - 2019
EventISMRM 27th Annual Meeting & Exhibition - Palais des congrès de Montréal, Montréal, Canada
Duration: 11 May 201916 May 2019
Conference number: 27


ConferenceISMRM 27th Annual Meeting & Exhibition
LocationPalais des congrès de Montréal
Internet address


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