Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing);
Department of Radiology;
Peking University Cancer Hospital&Institute;
Beijing 100142;
China;
Department of Forensic Medicine;
Shanxi Medical University;
Taiyuan 030001;
China;
Department of Radiology;
the Sixth Affiliated Hospital;
Sun Yat-sen University;
Guangzhou 510655;
China;
Department of Radiology;
National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital;
Chinese Academy of Medical Sciences and Peking Union Medical College;
Beijing 100021;
China;
Department of Medical Imaging;
Cancer Hospital of China Medical University;
Shenyang 110042;
China;
Rectal cancer; T3 stage; substage; distance to mesorectal fascia; magnetic resonance imaging;