1. Department of Radiology, The First Hospital of Shijiazhuang City, Shijiazhuang, Hebei 050011, P.R. China
2. Department of Cardiothoracic Surgery, The First Hospital of Shijiazhuang City, Shijiazhuang, Hebei 050011, P.R. China
3. Department of Computerized Tomography, The First Hospital of Shijiazhuang City, Shijiazhuang, Hebei 050011, P.R. China