title: In vivo precision of the GE Lunar iDXA for the measurement of visceral adipose tissue in adults: the influence of body mass index.
abstract: CoreScan is a new software for the GE Lunar iDXA, which provides a quantification of visceral adipose tissue (VAT). The objective of this study was to determine the in vivo precision of CoreScan for the measurement of VAT mass in a heterogeneous group of adults. Forty-five adults (aged 34.6 (8.6) years), ranging widely in body mass index (BMI 26.0 (5.2)  kg/m(2); 16.7-42.4 kg/m(2)), received two consecutive total body scans with repositioning. The sample was divided into two subgroups based on BMI, normal-weight and overweight/obese, for precision analyses. Subgroup analyses revealed that precision errors (RMSSD:%CV; root mean square standard deviation:% coefficient of variation) for VAT mass were 20.9 g:17.0% in the normal-weight group and 43.7 g:5.4% in overweight/obese groups. Our findings indicate that precision for DXA-VAT mass measurements increases with BMI, but caution should be used with %CV-derived precision error in normal BMI subjects.
authors.affiliation: Carnegie Faculty, Leeds Metropolitan University, Headingley Campus, Leeds, UK.
authors.forename: M G
authors.initials: MG
authors.lastname: Mellis
authors.affiliation: Division of Medical Physics, University of Leeds, Leeds, UK.
authors.forename: B
authors.initials: B
authors.lastname: Oldroyd
authors.affiliation: Carnegie Faculty, Leeds Metropolitan University, Headingley Campus, Leeds, UK.
authors.forename: K
authors.initials: K
authors.lastname: Hind
mesh_terms: D050153:Abdominal Fat / Q000000981:diagnostic imaging*; D015502:Absorptiometry, Photon / Q000379:methods*; D000328:Adult; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results; D012984:Software