Department of Radiation Oncology;
Fudan University Shanghai Cancer Center;
Department of Oncology;
Shanghai Medical College;
Fudan University;
Department of Colorectal Surgery;
Fudan University Shanghai Cancer Center;
Department of Endoscopic Center;
Zhongshan Hospital;
Fudan University;
Department of Radiology;
Fudan University Shanghai Cancer Cente;
Locally; advanced; rectal; cancer; Neoadjuvant; chemoradiation; Diffusion-weighted; magnetic; resonance; imaging; Apparent; diffusion; coefficient;