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直肠癌单纯根治切除术的五年生存率,据有关报导均不高。为了进一步提高其生存率和生存质量,近年来国内外都采用了综合性治疗方法,特别是直肠癌的术前放射治疗日趋受到重视,并取得了一定的成效。X 线双对比造影是诊断直肠癌及直肠癌放疗前定位设计和放疗后疗效观察的主导影像检查方法。由于放疗后复杂的组织
The five-year survival rate of radical radical resection for rectal cancer is not reportedly high. In order to further improve its survival rate and quality of life, comprehensive treatment methods have been adopted at home and abroad in recent years. In particular, preoperative radiation therapy for rectal cancer has become increasingly important and has achieved certain results. X-ray double-contrast angiography is the dominant imaging examination method for the diagnosis of rectal cancer and rectal cancer before radiotherapy and after radiotherapy. Due to the complex tissue after radiotherapy