1. Department of Radiology; Beijing Shijitan Hospital affiliated to Capital University of Medical Sciences; Beijing; China
2. Department of CT; Shandong Medical Imaging Research Institute; Jinan; China
3. Beijing Shijitan Hospital affiliated to Capital University of Medical Sciences; Beijing; China
4. Department of Radiology; Shandong Chest Hospital; Jinan; China
5. Healthcare, Siemens Ltd; Beijing; China