NMR and MRI obtained with high transition temperature dc SQUIDs

We have measured nuclear magnetic resonance (NMR) signals from several samples at room temperature in magnetic fields ranging from about 0.05 mT to 2 mT using a spectrometer based on a high-Tc dc SQUID (high transition temperature dc Superconducting QUantum Interference Device). We are able to observe proton signals from 1 mL of mineral oil in 2 mT in a single transient. The sensitivity of this system has also allowed the detection of proton NMR at magnetic fields as low as 0.059 mT, which is comparable to the Earth’s field. Such results make possible a number of new experiments in magnetic resonance imaging (MRI). We present a two-dimensional image of a phantom filled with mineral oil obtained in a field of 2 mT.

Bibliographic Details

Main Authors:	Souza,R.E. de, Schlenga,K., Wong-Foy,A., McDermott,R., Pines,A., Clarke,John
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 1999
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000400009
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