The apparent concentration of lithium (Li) in vivo was determined for several regions in the brain and muscle of rats by 7 Li NMR imaging at 4.7 T with inclusion of an external standard of known concentration and visibility. The average apparent concentrations were 10.1 mM for muscle, and 4.2-5.3 mM
The distribution of lithium in rat brain and muscle in vivo by 7Li NMR imaging
β Scribed by Richard A. Komoroski; John M. Pearce; Joseph E. O. Newton
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 437 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0740-3194
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β¦ Synopsis
Abstract
The regional distribution of lithium (Li) in vivo was determined on a relative basis in the brain and muscle of rats by ^7^Li NMR imaging. Both high resolution ^7^Li NMR spectroscopy and atomic absorption spectrophotometry were performed on extracts of brain and muscle tissue from the same rats. The average in vivo results were generally in good agreement with the corresponding average in vitro results, despite the relatively low signalβtoβnoise ratio of the in vivo images. There was good agreement between the two in vitro methods of analysis, both on average and for individual animals. Significant differences were found in vivo among Li concentration ratios for the various brain regions and muscle by ^7^Li imaging, as well as by the in vitro methods.
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