食管癌是我国常见病、多发病，在食管癌的治疗过程中，放疗占有举足轻重的地位，以往设野大多依据食管钡餐造影及在模拟机下吞钡时梗阻为中心设野，随着ＣＴ的逐渐普及，能够对食管癌的大小及侵犯范围作出较为准确的估计，使放射治疗更加个体化、准确化［１］。我们通过对... Esophageal cancer is a common and frequently-occurring disease in China. Radiotherapy plays a decisive role in the treatment of esophageal cancer. In the past, most of the established fields were based on esophageal barium meal imaging and obstruction at the time of swallowing under the simulator. Gradually spread, can make a more accurate estimate of the size of the esophageal cancer and range of violations, so that radiation therapy is more individualized and accurate [1]. We pass through...