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A theoretical analysis using ratios of the major elements measured by neutron activation analysis to derive total body water, protein, and fat
Author(s) -
Sutcliffe J. F.,
Smith A. H.,
Barker M. C. J.,
Smith M. A.
Publication year - 1993
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.597009
Subject(s) - neutron activation analysis , nitrogen , oxygen , hydrogen , chemistry , carbon fibers , reproducibility , neutron , analytical chemistry (journal) , radiochemistry , neutron activation , materials science , chromatography , physics , nuclear physics , organic chemistry , composite number , composite material
A theoretical analysis based upon Reference Man is used to derive the water, protein, and fat components of soft tissue using the ratios of carbon/oxygen and nitrogen/hydrogen determined by in vivo neutron activation analysis and measurement of body mineral content by dual energy x‐ray absorptiometry. The standard deviations in the estimates of water, protein, and fat are 0.58, 0.59, and 0.53 kg, respectively, if the reproducibility of measurement of the carbon/oxygen ratio is 2.5% and of the nitrogen/hydrogen ratio is 5%, the accuracy of measurement of bone mineral is 4%, and estimate of glycogen is 0.5 kg. New neutron activation technology may permit sufficiently precise measurements.