子宫颈癌四野照射屏蔽铅块设计探讨  

Radiation barrier for cervical cancer treated with external radiation

作　　者：秦日昇[1] 刘美莲[4] 马秋英[2] 徐李容[1] 刘陶文[1] 王琼[3] 叶仕其[1] 

机构地区：[1]广西壮族自治区南溪山医院放疗科,桂林541002 [2]广西壮族自治区南溪山医院妇科,桂林541002 [3]广西壮族自治区南溪山医院B超室,桂林541002 [4]桂林医学院附属医院肿瘤科

出　　处：《肿瘤研究与临床》2009年第11期769-771,共3页Cancer Research and Clinic

基　　金：广西科学研究与技术开发计划（桂科攻：0592007-2F）

摘　　要：目的探讨子宫颈癌四野照射合理铅块设计配合腔内治疗的更佳方法。方法对39例各期子宫颈癌患者四野照射时超声测量子宫颈管至肿瘤外缘距离及妇科检查了解子宫旁情况，TPS计算四野照射时用固定铅块的放射治疗方法的子宫旁剂量，关注子宫旁的低剂量区。结果四野照射时用固定铅块的放射治疗方法可能导致子宫旁的低剂量区，且肿瘤可能落在低剂量区内。39例患者中仍有29例见子宫旁不良改变，即肿瘤可能落在低剂量区内。结论使用等中心技术个体化设计四野照射时的中线屏蔽铅块，能更好地消除子宫旁的低剂量区。Objective To study more reasonable method of radiation barrier for cervical cancer treated with external radiation. Methods The distance from cervical canals to tumor＇s margin in x axis was measured by B ultrasonic, around uterus were evaluated by physical examination.and the dose around uterus for patient who used fixed lead brick for radiation barrier when treated with external radiation were calculationed by TPS, in 39 case of cervical cancer treated with external radiation combine with intracavitary irradiation.Pay attention to the lower dose area around uterus. Results It might bring about lower close area around uterus who used fixed lead brick for radiation barrier when treated with external radiation,and mass might be in above area. Conclusion Cervical cancer treated with external radiation with source axial distance （SAD）, and radiation barrier with lead brick individuate may help for to avoid the lower dose area around uterus.

关 键 词：子宫颈肿瘤 放射疗法 放射治疗剂量 

分 类 号：R737.33[医药卫生—肿瘤] R284.2[医药卫生—临床医学]