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Quantitative lithium magnetic resonance spectroscopy in the normal human brain on a 3 T clinical scanner
Author(s) -
Smith Fiona E.,
Cousins David A.,
Thelwall Peter E.,
Ferrier I. Nicol,
Blamire Andrew M.
Publication year - 2011
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.22923
Subject(s) - nuclear magnetic resonance , magnetic resonance imaging , nuclear magnetic resonance spectroscopy , lithium (medication) , human brain , spectroscopy , nuclear medicine , chemistry , medicine , physics , radiology , psychiatry , quantum mechanics
Abstract Lithium (Li) is a core for many neuropsychiatric conditions. The safe serum range of Li treatment is narrow, and regular monitoring by blood test is required, although serum levels are thought to be a poor indicator of Li concentration in the brain itself. Brain Li concentration can be measured by magnetic resonance spectroscopy. However, little data exist in the healthy human brain, and there are no studies of the relaxation properties of brain 7 Li at 3 T. Here, 11 healthy male subjects were prescribed Li over a period of 11 days. In seven subjects, the in vivo T 1 of 7 Li was measured to be 2.1 ± 0.7 s. In the remaining subjects, spectroscopic imaging (1D) yielded a mean brain 7 Li concentration of 0.71 ± 0.1 mM, with no significant difference between gray and white matter. Mean serum concentration was 0.9 ± 0.16 mM, giving a mean brain/serum ratio of 0.78 ± 0.26. Magn Reson Med, 2011. © 2011 Wiley‐Liss, Inc.