放射治疗是胸廓入口食管癌重要的治疗手段。射野设计时,由于颈胸部外轮廓的变化、食管和脊髓的距离很近,可导致靶区剂量分布不均匀和脊髓量过高。因此,我们提出一种新的方法——楔形补偿两前斜野照射法解决上述存在的问题. 测量表明颈段和胸廓入口处食管和脊髓的距离约3.0cm,食管偏左0.9cm。因此,在模拟定位及治疗计 Radiation therapy is an important treatment for thoracic entry esophageal cancer. When the field is designed, due to changes in the external contour of the neck and the distance between the esophagus and the spinal cord, the dose distribution in the target area and the spinal cord volume may be too high. Therefore, we propose a new method—wedge compensation for the two front oblique field irradiation methods to solve the above-mentioned problems. The measurements showed that the distance between the esophagus and the spinal cord at the entrance of the neck and the thorax was about 3.0 cm, and the esophagus was left at 0.9 cm. Therefore, in the simulation of positioning and treatment