CAJ | 학술논문

　　目的比较子宫颈癌术后盆腔复发不同射野数目调强放疗(IMRT)计划的靶区和危及器官剂量学差异。方法10例子宫颈癌术后盆腔复发的病例，分别设计5、7及9野的IMRT计划，比较各计划间靶区剂量学特点及危及器官的受照射剂量及体积。结果5F-IMRT、7F-IMRT及9F-IMRT计划的靶区V95%、D95%及剂量的适形性与均匀性未见统计学差异。危及器官的受照射剂量及体积，各IMRT计划之间的差异无统计学意义。结论子宫颈癌术后盆腔复发放疗，在靶区的剂量分布和正常器官保护方面，5、7及9野的IMRT计划相比未见优劣。
　　목적비교자궁경암술후분강복발불동사야수목조강방료(IMRT)계화적파구화위급기관제량학차이。방법10례자궁경암술후분강복발적병례，분별설계5、7급9야적IMRT계화，비교각계화간파구제량학특점급위급기관적수조사제량급체적。결과5F-IMRT、7F-IMRT급9F-IMRT계화적파구V95%、D95%급제량적괄형성여균균성미견통계학차이。위급기관적수조사제량급체적，각IMRT계화지간적차이무통계학의의。결론자궁경암술후분강복발방료，재파구적제량분포화정상기관보호방면，5、7급9야적IMRT계화상비미견우렬。
Objective To compare the dosimetric difference in planning target volumn and organ at risk(OAR) between intensity modulated radiation therapy(IMRT) plans with different beam arrangements. Methods Ten patients with recurrent cervical cancer were included in the study. For each patient, three IMRT treatment plans with 5,7and 9 beam fields were designed respectively. The target volume dose , conformal index(CI), homogeneity index(HI), and the dose and volume radiated of the OAR were compared. Results There was no significant differences among the IMRT plans in target volume dose, CI, HI. The dose and volumes of OAR among the IMRT plans were no significantly different. Conclusion In the dose distribution of target and the protection of normal structures, there was no obvious advantage among the 5-field IMRT, 7-field IMRT and 9-field IMRT plans in treating recurrent cervical cancer.