Characterization of brown adipose tissue ¹⁸F-FDG uptake in PET/CT imaging and its influencing factors in the Chinese population

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• 作者：Xiaonan Shao ; Xiaoliang Shao ; Xiaosong Wang ; Yuetao Wang ; ^{yuetao-w@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Brown adipose tissue ; Deoxyglucose ; Emission-computed ; Tomography ; X-ray computed
• 刊名：Nuclear Medicine and Biology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：43
• 期：1
• 页码：7-11
• 全文大小：423 K

文摘

¹⁸F-FDG PET/CT has been widely applied for tumor imaging. However, it is reported that many normal tissues, e.g., brown adipose tissue, can also uptake ¹⁸F-FDG. The purpose of this study was to determine the imaging characteristics of ¹⁸F-FDG uptake in brown adipose tissue (BAT) in PET/CT. A total of 2,944 patients who underwent PET/CT from September 2011 to March 2013 were analyzed retrospectively. Imaging features of ¹⁸F-FDG uptake in BAT were analyzed. Univariate analysis and logistic regression analysis were performed to evaluate the effect of age, gender, cancer status, body mass index (BMI), average daily maximum temperature of imaging month and fasting plasma glucose (Glu) on the positive rate of ¹⁸F-FDG uptake in BAT. The results showed that 1.9% (57/2944) patients had ¹⁸F-FDG uptake in BAT. ¹⁸F-FDG, manifested as flaky, nodular and beaded shape, was symmetrically distributed in the adipose tissues of cervical and supraclavicular, mediastinal, paravertebral, and perirenal areas. Uptake of ¹⁸F-FDG within cervical/supraclavicular area was most common (89.5%, 51/57) with an SUV_max ranging from 2.8 to 31.4. Univariate analysis showed that gender and cancer status were not significantly correlated with the BAT ¹⁸F-FDG uptake rate. In contrast, age, BMI, Glu and average daily maximum temperature in the imaging month were significantly correlated with the BAT ¹⁸F-FDG uptake rate (P < 0.05). Further logistic regression analysis showed that only age, BMI and average daily maximum temperature were significant (OR < 1, P < 0.05). Based on the value of OR, the most significant factor that affects BAT ¹⁸F-FDG uptake rate was age, followed by the average daily maximum temperature and BMI. We concluded that Chinese adult has low positive rate of ¹⁸F-FDG uptake in BAT. Cervical/Supraclavicular is the most common area with BAT ¹⁸F-FDG uptake. Age, average daily maximum temperature and BMI are independent factors affecting ¹⁸F-FDG uptake.