1. From the Departments of Radiology (T.W., Y.Y., X.S.) and Thoracic Surgery (Y.S., X.L., Y.Z., J.D., M.Z., D.X., C.C.), Shanghai Pulmonary Hospital, Tongji University School of Medicine, Zhengmin Rd 507, Shanghai 200443, China; and Department of Computer Science and Technology, College of Electronics and Information Engineering, Tongji University, Shanghai, China (S.C.).