1. Department of Medical Image, The First Affiliated Hospital of Xi’anJiaotong University, Xi’an, China
2. Department of CT, The Weapons Industry of 521 Hospital, Xi’an, China
3. Department of Radiology, The Affiliated Hospital of Shaanxi University of traditional Chinese Medicine, Xian yang, China
4. The Second Department of Thoracic Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China