CAJ | 학술논문

调强放疗逐渐成为鼻咽癌的主要治疗方式。其疗程一般为7~8周，随着治疗进行，患者口咽反应逐渐加重，体重下降，肿瘤组织退缩，靶区周围组织发生变化。这些变化将影响靶区及危及器官的剂量分布，因此调强放疗期间复位进行靶区修正是很有必要的。
조강방료축점성위비인암적주요치료방식。기료정일반위7~8주，수착치료진행，환자구인반응축점가중，체중하강，종류조직퇴축，파구주위조직발생변화。저사변화장영향파구급위급기관적제량분포，인차조강방료기간복위진행파구수정시흔유필요적。
Intensity modulated radiation therapy(IMRT)has become the mainstay of treatment modal-ity for nasopharyngeal carcinoma(NPC). The whole treatment course generally continues 7 to 8 weeks. With the radiotherapy proceeding,the patients exhibit oropharyngeal reaction aggravating,weight losing and tumor shrinking,resulting in the changes of tumor target and surrounding tissue. Those changes may influence the dose distribution of tumor and organ at risk. It is necessary to modulate target volume during radiotherapy of NPC.