Fig. 1
The subdivision of CTV. a The CTV-C of the uterine cervical cancer was evenly divided into CTV-Cup and CTV-Cdown according to the length of the target. b The uterus of the uterine cervical cancer (CTV-U). (c)The CTV-V of the postoperative cervical cancer was evenly divided into CTV-Vup and CTV-Vdown according to the length of the target. d–g The CTV-N was firstly divided into four portions from supper to low, and the boundaries were the bifurcation of the common iliac artery, the appearance of the piriformis muscle, and the appearance of the femoral head. Then, the middle two portions were subdivided into four sections along the transverse axis and midline of the body, and the lowest portion was divided into two parts according to the midline of the body