SQUID-Detected Microtesla MRI in the presence of Metal

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In magnetic resonance imaging (MRI) 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 (SQUID) as the signal detector, we have obtained ... continued below

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Moessle, Michael; Han, Song-I.; Myers, Whittier; Lee, Seung-Kyun; Kelso, Nathan; Hatridge, Michael et al. September 6, 2006.

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In magnetic resonance imaging (MRI) 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 (SQUID) 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.

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  • Journal Name: Journal of Magnetic Resonance; Journal Volume: 179; Related Information: Journal Publication Date: 2006

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  • Report No.: LBNL--61849
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 902447
  • Archival Resource Key: ark:/67531/metadc879962

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  • September 6, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 29, 2016, 7:03 p.m.

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Moessle, Michael; Han, Song-I.; Myers, Whittier; Lee, Seung-Kyun; Kelso, Nathan; Hatridge, Michael et al. SQUID-Detected Microtesla MRI in the presence of Metal, article, September 6, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc879962/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.