食管癌的首选治疗是手术切除。但常常由于病期太晚，或由于内科原因，往往大多数的病人需进行放射治疗。外照射放射治疗食管癌一般均采用外照射（远距离治疗）。常用直线加速器的X线，在我国钻60－γ线也常用。通常采用前正中及背部两个斜野交叉照射，其5年生存率为4．5％－17 The preferred treatment for esophageal cancer is surgical resection. However, most patients often require radiation therapy because of the late stage of illness or due to medical reasons. External radiation therapy for esophageal cancer generally uses external irradiation (distance therapy). X-rays of commonly used linear accelerators are commonly used for drilling 60-γ lines in China. Normally used in the middle of the front and the back of the back, the 5-year survival rate is 4.5%-17.