Yuhua Yang1, Yiling Wang2, Juyi Lin1, Lisha Liu1, Shengcai Huang3. 1. Department of PET/CT, First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi Zhuangzu, China. 2. Department of Radiology, First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi Zhuangzu, China. 3. Department of PET/CT, First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi Zhuangzu, China. shcaihuang@126.com.