1. Department of Radiology Liuzhou People's Hospital Affiliated to Guangxi Medical University No. 8 Wenchang Road Liuzhou 545006 P. R. China
2. Central Laboratory Shanghai Tenth People's Hospital Tongji University School of Medicine Shanghai 200072 P. R. China
3. National Center for International Research of Bio‐targeting Theranostics Guangxi Key Laboratory of Bio‐targeting Theranostics Guangxi Medical University No. 22 Shuangyong Road 22 Nanning 530021 P. R. China