Results and conclusion : the extracted esophageal boundary variations between adjacent time frame sequences can be applied to estimate the tumor motions as well as the required safe margins 结论：移动评估的结果，有利于治疗计画中安全边距的缩小，在肿瘤治疗剂量增加时仍能有效控制正常组织所接受之剂量，降低正常组织副作用发生机率及其发生的严重程度。
