Total body composition by dual-photon (153Gd) absorptiometry
The lean-fat composition (%FATR) of soft tissue and the mineral mass of the skeleton were determined in vivo using dual-photon (153Gd) absorptiometry (dose under 2 mrem). A rectilinear raster scan was made over the entire body in 18 subjects (14 female, 4 male). Single-photon absorptiometry (125I) measured bone mineral content on the radius. Percentage fat (%FATD) was determined in the same subjects using body density (from underwater weighing with correction for residual lung volume). Lean body mass (LBM) was determined using both %FATR and %FATD. Percentage fat from absorptiometry and from underwater density were correlated (r . 0.87). The deviation of %FATD from %FATR was due to the amount of skeletal mineral as a percentage of the LBM (r . 0.90). Therefore, skeletal variability, even in normal subjects, where mineral ranges only from 4 to 8% of the LBM, essentially precludes use of body density as a composition indicator unless skeletal mass is measured. Anthropometry (fatfolds and weight) predicted %FATR and LBM at least as well as did underwater density. The predictive error of %FATR from fatfolds was 5% while the predictive error in predicting LBM from anthropometry was 2 to 3 kg (3%).
- Research Organization:
- Univ. of Wisconsin, Madison
- OSTI ID:
- 5975445
- Journal Information:
- Am. J. Clin. Nutr.; (United States), Journal Name: Am. J. Clin. Nutr.; (United States) Vol. 40:4; ISSN AJCNA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of dual-photon absorptiometry systems for total-body bone and soft tissue measurements: Dual-energy X-rays versus gadolinium 153
Measurement of the subcutaneous fat in the distal forearm by single photon absorptiometry
Related Subjects
59 BASIC BIOLOGICAL SCIENCES
ADIPOSE TISSUE
ANIMAL CELLS
ANIMAL TISSUES
ANIMALS
BETA DECAY RADIOISOTOPES
BODY
BODY COMPOSITION
CONNECTIVE TISSUE
CONNECTIVE TISSUE CELLS
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
DIAGNOSTIC USES
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
FAT CELLS
GADOLINIUM 153
GADOLINIUM ISOTOPES
IN VIVO
INTERMEDIATE MASS NUCLEI
ISOTOPE APPLICATIONS
ISOTOPES
LABELLED COMPOUNDS
MAMMALS
MAN
MINERALS
MONITORING
NUCLEI
ORGANS
PHOTON EMISSION SCANNING
PRIMATES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SKELETON
SOMATIC CELLS
TISSUES
TRACER TECHNIQUES
USES
VERTEBRATES