Risk factor analysis for major mediastinal vessel invasion in thymic epithelial tumors based on multi-slice CT Imaging oleh Yu-Hui Ma, Yu-Hui Ma, Jie Zhang, Wei-Qiang Yan, Jiang-Tao Lan, Xiu-Long Feng, Shu-Mei Wang, Guang Yang, Yu-Chuan Hu, Yu-Chuan Hu, Guang-Bin Cui, Guang-Bin Cui