1. Invasive Technology Department, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
2. Invasive Technology Department, Shandong Medical Imaging Research Institute, Jinan, Shandong 250021, P.R. China
3. Department of Physical Examination, Jining First People's Hospital, Jining, Shandong 272000, P.R. China