摘要
目的探讨宫颈癌俯卧位IMRT时Belly-board不同位置对靶区动度和剂量分布的影响。方法分别测量10例宫颈癌患者在Belly-board上两种体位(PⅠ:耻骨联合上缘置于Belly-board孔下缘;PⅡ:骶髂关节的下缘置于Belly-board孔下缘)下靶区移动的范围及靶区剂量分布,比较两者的关系。结果靶区在腹背方向存在一定的移动(1～1.5cm),有统计学意义(P<0.05),而在水平及头脚方向的移动无统计学意义(P>0.05);但靶区移动时,靶区本身在各剂量区的受照体积差异无统计学意义(P>0.05)。结论 Belly-board的位置不同会造成靶区的空间位置改变,但靶区移动对靶区剂量分布无影响。
Objective To investigate the influence of two different prone positions with belly-board on target motions and their dose distributions in pelvic 3-Dimension intensity-modulated radiation radiotherapy of cervical cancer.Methods The motion ranges of GTV under two different prone positions with belly-board（The first prone position： the lower end of belly-board hole opening near the upper end of lumbosacral junction;the second prone position： the lower end of belly-board hole opening near the lower end of the sacroiliac joints） and the dose-volume histograms of GTV,CTV and PTVwere measured for all 10 cervical cancer patients received pelvic radiotherapy,and the relationship of them was compared.Results The target motions under two different prone positions with belly-board are existed in the abdomen-back＇ directions（1~1.5cm）,and have statistical significance（P0.05）,while there is no statistical significance in the head-feet＇ directions and left-right＇ directions（P0.05）;But the dose-volume histogram changes of GTV,CTV and PTV under two different prone positions with belly-board are no Statistical significance（P0.05）.Conclusion The target motions under two different prone positions with belly-board are existed,but they have no influence on dose-volume histograms of themselves.
出处
《肿瘤防治研究》
CAS
CSCD
北大核心
2011年第4期416-419,共4页
Cancer Research on Prevention and Treatment
关键词
宫颈癌
Belly-board靶区移动
盆腔放疗
三维适形放疗
调强放疗
Cervical cancer
Belly-board
Target motions
Pelvic radiotherapy
3-Dimension conformal radiation therapy
3-Dimension intensity-modulated radiation therapy
