| Literature DB >> 16310385 |
Michael Mössle1, Song-I Han, Whittier R Myers, Seung-Kyun Lee, Nathan Kelso, Michael Hatridge, Alexander Pines, John Clarke.
Abstract
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.Entities:
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Year: 2005 PMID： 16310385 DOI： 10.1016/j.jmr.2005.11.005
Source DB: PubMed Journal: J Magn Reson ISSN： 1090-7807 Impact factor: 2.229