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Naoko Morita, Noboru Takamura, Tomohiko Murakami, Ohzora Jo, Kiyoshi Aoyagi, Shunichi Yamashita, Yutaka Okumura, Evaluation of fat-free mass by whole-body counter in Japanese healthy young adults, Radiation Protection Dosimetry, Volume 123, Issue 1, January 2007, Pages 128–130, https://doi.org/10.1093/rpd/ncl079
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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 40K. 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.