title: Evaluation of fat-free mass by whole-body counter in Japanese healthy young adults.
abstract: Whole-body counters (WBCs) are special instruments for measuring internal irradiation doses and are usually housed within or around nuclear facilities in the event of unexpected radiation emergencies. As a substantial proportion of total body potassium (TBK) is found in fat-free mass (FFM), FFM volume can be predicted from WBC-measured (40)K. We screened TBK in Japanese healthy young adults using a WBC and found strong linear correlations between TBK and lean body mass (LBM) and body mass index (r = 0.97, P < 0.01 and r = 0.47, P < 0.01, respectively). Multiple linear regression analysis, following adjustments for sex, indicates that only LBM has a significant correlation with TBK (P < 0.01). These results strongly support the feasibility of using WBCs for estimating FFM.
authors.affiliation: Department of Radiation Biophysics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Morita
authors.forename: Noboru
authors.initials: N
authors.lastname: Takamura
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Murakami
authors.forename: Ohzora
authors.initials: O
authors.lastname: Jo
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Aoyagi
authors.forename: Shunichi
authors.initials: S
authors.lastname: Yamashita
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Okumura
mesh_terms: D015502:Absorptiometry, Photon; D000273:Adipose Tissue / Q000378:metabolism*; D000328:Adult; D001823:Body Composition; D005260:Female; D006801:Humans; D008297:Male; D011188:Potassium / Q000378:metabolism*; D014915:Whole-Body Counting
chemical_list: D011188:Potassium