title: The Prevalence and Characteristics of Brown Adipose Tissue in an (18)F-FDG PET Study of Koreans.
abstract: OBJECTIVE
  The object of this study was to evaluate the prevalence and characteristics of brown adipose tissue (BAT) in Korean subjects using (18)F-fluorodeoxyglucose positron emission tomography ((18)F-FDG PET).
  
  
  METHODS
  Six thousand and five consecutive (18)F-FDG PET/CT scans of 5,115 patients (3,007 females and 2,108 males, mean age 53.5 years) were retrospectively reviewed. We characterized the nature of BAT, such as its location, and we assessed the influence of sex, age, body mass index (BMI), and temperature on BAT.
  
  
  RESULTS
  The prevalence of BAT in Koreans in a single (18)F-FDG PET/CT scan in average conditions was 1.07%. The BAT detection rate was higher in females than males (1.32% vs 0.73%), and also with younger age (7.94% vs 0.73%), lower BMI (BMI with BAT, 21.1 vs BMI without BAT, 23.15) and cold outdoor temperature (1.65% vs 0.49%). The most frequent location of BAT was the supraclavicular area (left, 0.91%; right, 0.88%) and ventral neck area (left, 0.62%; right, 0.63%).
  
  
  CONCLUSIONS
  The characteristics of BAT in Koreans are not different from those described for Caucasians. However, the low prevalence of BAT in our study might be related to some scan condition like ambient temperature, but further study is needed.
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: Joon Yeun
authors.initials: JY
authors.lastname: Park
authors.affiliation: Department of Pediatrics, Korea Institute of Radiological & Medical Sciences, Seoul, Korea.
authors.forename: Jung Sub
authors.initials: JS
authors.lastname: Lim
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: Eun Young
authors.initials: EY
authors.lastname: Park
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: A Ra
authors.initials: AR
authors.lastname: Cho
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: Byeong Il
authors.initials: BI
authors.lastname: Kim
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: Gi Jeong
authors.initials: GJ
authors.lastname: Cheon
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: Chang Woon
authors.initials: CW
authors.lastname: Choi
authors.affiliation: Department of Nuclear Medicine, Korea Institute of Radiological & Medical Sciences, 75 Nowon-gil, Nowon-gu, Seoul, 139-706 South Korea.
authors.forename: Sang Moo
authors.initials: SM
authors.lastname: Lim
keywords: Brown adipose tissue; FDG; Korean; PET