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Journal of Lipid Research, Vol 38, 343-347, Copyright © 1997 by Lipid Research, Inc.
A Sbarbati, U Guerrini, P Marzola, R Asperio and F Osculati
In vivo distinction between small deposits of brown adipose tissue (BAT)
and surrounding tissues may be difficult. In this article, we propose an
experiment paradigm, based on techniques of chemical shift magnetic
resonance imaging (CSI), which can improve the methods presently available
for the study of BAT. Male rats were examined in an imager-spectrometer
equipped with a 4.7 T magnet. Proton spectra of isolated BAT deposits
showed that both fat and water protons contributed significantly to the
genesis of the magnetic resonance signal. An equivocal definition of BAT
deposits was obtained by three (respectively, spin-echo, water-selective,
and fat-selective) images. The spin-echo (SE), T1-weighted image provided
the best anatomical description of the structures. The images selective for
fat-protons displayed the degree of lipid accumulation in each area. The
images selective for water-protons provided an internal control of adipose
tissue localization. The proposed paradigm allows an unequivocal definition
of BAT deposits and appears particularly useful in studies where
experimental manipulation (i.e., cold acclimation or drug treatment)
produces changes in this issue.
ARTICLES
Chemical shift imaging at 4.7 tesla of brown adipose tissue
Institute of Anatomy and Histology, University of Verona, Italy.
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E. Lunati, P. Marzola, E. Nicolato, M. Fedrigo, M. Villa, and A. Sbarbati In vivo quantitative lipidic map of brown adipose tissue by chemical shift imaging at 4.7 tesla J. Lipid Res., August 1, 1999; 40(8): 1395 - 1400. [Abstract] [Full Text] |
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