1. School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology 516 Jun Gong Road Shanghai 200093 China
2. Department of Radiology Fudan University Shanghai Cancer Center 270 Dongan Road Shanghai 200032 China
3. Radiology Department Shanghai Pulmonary Hospital 507 Zheng Min Road Shanghai 200433 China
4. Department of Radiology The First Affiliated Hospital of Zhengzhou University Zhengzhou 450052 China
5. School of Electrical and Computer Engineering University of Oklahoma Norman OK 73019 USA