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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。
Objective To compare the dosimetry of target areas and endocrine organs in patients with recurrent esophageal carcinoma after IMRT. Methods 10 cases of recurrent pelvic cancer after cervical cancer cases were designed 5,7 and 9 field IMRT plan to compare the dosimetry between target sites and the risk of organ irradiation dosage and volume. Results The conformability and uniformity of V95%, D95% and dose of 5F-IMRT, 7F-IMRT and 9F-IMRT were not statistically different. There was no significant difference in the doses and volumes of organs that were endangering organs and the IMRT plans. Conclusions Pelvic Recurrence Radiotherapy after Cervical Cancer Operation There are no pros and cons of IMRT in 5, 7 and 9 fields in terms of target dose distribution and normal organ preservation.