因为肿瘤位于盆腔深部,直肠癌复发的诊断非常困难。利用超声波可以检查盆腔器官,估计病变性质。经82例患者证明,手术后局部解剖关系破坏,确定诊断困难。应用超声方法,在短时间内就能得到软组织的正常和病理结构变化声像图,还可以观察大血管的搏动、肠蠕动,估计膀胱轮廓变化及 Because the tumor is located deep in the pelvic cavity, the diagnosis of rectal cancer recurrence is very difficult. Ultrasound can be used to examine pelvic organs and estimate the nature of the lesion. The 82 patients demonstrated that the local anatomical relationship was destroyed after the operation and the diagnosis was difficult. Ultrasound can be used to obtain normal and pathological changes of soft tissue in a short period of time. It is also possible to observe the pulsations and peristalsis of large vessels and to estimate changes in the contour of the bladder.