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膀胱容量变化对宫颈癌放疗中肿瘤体积及参考点位置的影响 被引量:5

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摘要 目的:分析膀胱不同容量对宫颈癌大体肿瘤体积(GTV)、中心点及体表参考点位置的影响,为勾画靶区提供参考。方法:选取IIB^IIIB期宫颈癌患者17例,分别在膀胱充盈及排空状态下行模拟定位CT扫描,由同一位医生勾画膀胱不同容量下肿瘤GTV,比较充盈状态下(GTVF)与排空状态下(GTVE)肿瘤体积大小、中心点三维坐标及体表参考点三维坐标的差异,分析参考点位置变化与膀胱容量的相关性。结果:宫颈肿瘤GTVF与GTVE的体积分别为(70.42±30.29)cm3、(71.66±30.15)cm3,两者比较差异无统计学意义(P=0.236)。膀胱充盈与排空状态下,GTV中心点X轴坐标分别为-6.00±12.37、-6.34±11.94(P=0.21),Y轴分别为-423.37±142.27、-427.40±139.13(P=0.01),Z轴分别为-52.82±14.05、-51.46±12.04(P=0.35)。膀胱充盈与排空状态下体表参考点X轴的坐标分别为-12.02±18.43、-11.96±18.40(P=0.86),Y轴的坐标分别为-377.49±136.76、-378.28±135.84(P=0.43),Z轴坐标分别为74.60±20.10、68.55±19.75(P=0.02)。参考点在Z轴方向的位移与膀胱容量呈正相关(P=0.001)。结论:膀胱充盈状态对宫颈肿瘤GTV大小无明显影响,对宫颈肿瘤中心点及体表参考点位置均有影响。膀胱不同容量下宫颈肿瘤GTV的位移以头足方向为著,而体表参考点的位移在前后方向更明显。
出处 《现代妇产科进展》 CSCD 北大核心 2015年第6期459-461,共3页 Progress in Obstetrics and Gynecology
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参考文献15

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