1. Department of Radiology, Beijing Chaoyang Hospital of Capital Medical University, Beijing, China

2. Department of Radiology, the second affiliated Hospital of Xi'an Medical College, Xi’an City,China

3. Department of Clinical Pathology, Beijing Chaoyang Hospital of Capital Medical University, Beijing, China

4. Respiratory Diseases Research Center, Beijing Chaoyang Hospital of Capital Medical University, Beijing, China

5. Siemens MR Northeastern Collaboration Application Department, Siemens MRI Center, Beijing,China