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食管癌常规放疗的疗效不明显,5年生存率8%～10%,失败的原因为肿瘤局部未控和复发,20世纪90年代随着影像学和三维适形放射技术的发展,三维适形放疗在靶区确定,剂量分布均匀性,减少靶区周围正常组织受照射容积及剂量均有优势,在鼻咽癌、前列腺癌、非小细胞癌等的三维适形放疗与常规治疗的随机对比研究中已得到证实,但食管癌行全程三维适形放疗治疗的文献报道较少。
The curative effect of conventional radiotherapy of esophageal cancer is not obvious, 5-year survival rate of 8% to 10%, the reason for the failure of tumor uncontrolled and recurrence, the 20th century, 90’s with the development of imaging and three-dimensional conformal radiotherapy in the 1990s, three-dimensional conformal Radiotherapy in the target area to determine the uniformity of dose distribution, reduce the normal tissue around the target volume and dose irradiation have advantages in nasopharyngeal carcinoma, prostate cancer, non-small cell lung cancer and other three-dimensional conformal radiotherapy and conventional treatment of random comparison The study has been confirmed, but the full line of three-dimensional conformal radiotherapy esophageal cancer treatment reported less literature.