SQUID-detected microtesla MRI in the presence of metal

Michael Mößle*, Song I. Han, Whittier R. Myers, Seung Kyun Lee, Nathan Kelso, Michael Hatridge, Alexander Pines, John Clarke

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

108 Scopus citations


In magnetic resonance imaging performed at fields of 1 T and above, the presence of a metal insert can distort the image because of susceptibility differences within the sample and modification of the radiofrequency fields by screening currents. Furthermore, it is not feasible to perform nuclear magnetic resonance (NMR) spectroscopy or acquire a magnetic resonance image if the sample is enclosed in a metal container. Both problems can be overcome by substantially lowering the NMR frequency. Using a microtesla imaging system operating at 2.8 kHz, with a superconducting quantum interference device as the signal detector, we have obtained distortion-free images of a phantom containing a titanium bar and three-dimensional images of an object enclosed in an aluminum can; in both cases high-field images are inaccessible.

Original languageEnglish (US)
Pages (from-to)146-151
Number of pages6
JournalJournal of Magnetic Resonance
Issue number1
StatePublished - Mar 2006


  • Low field
  • Magnetic resonance imaging
  • RF screening
  • SQUID detection
  • Susceptibility artifacts

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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