DTI和DTT评估孕产史对女性盆底肌的影响  

DTI and DTT in evaluation of effect of childbearing history on female pelvic floor muscles

作　　者：门永超 孙成凤[1] 韩雨[1] 常光辉[1] 张桂华[1] 刘金刚[1] 王滨[2] 王锡臻[1] 

机构地区：[1]潍坊医学院附属医院医学影像中心,潍坊市261035 [2]滨州医学院影像学研究所,烟台市261003

出　　处：《实用医学杂志》2016年第20期3391-3393,共3页The Journal of Practical Medicine

基　　金：国家自然科学基金项目(编号:81171303;30470518);山东省自然科学基金(编号:ZR2009CL046;ZR2010HQ029);山东省优秀中青年科学家科研奖励基金(编号:BS2012YY038);潍坊医学院大学生科技创新基金(编号:KX2015011);潍坊医学院附属医院科技青年基金(编号:K12QC1040)

摘　　要：目的:探讨DTI及DTT评估孕产史对女性盆底肌的影响的可行性。方法:将46名健康女性分为未生育组和已生育组,行磁共振常规序列和DTI成像。调节最小FA阈值进行纤维重建,获得最佳纤维重建参数。测量双侧耻骨直肠肌的表观弥散系数(ADC)、各向异性分数(FA)、容积比各向异性(VRA)和T2加权迹线(T2-WT)。比较未生育组和已生育组的各参数值变化。结果:(1)纤维示踪设置最小FA取值0.18时获得的DTT图像得分最高。(2)未生育组和已生育组的耻骨直肠肌的ADC值分别为(1.24±0.11)×10^(-3)mm^2/S,(1.33±0.11)×10^(-3)mm^2/s(P=0.017);FA、VRA和T2-WT值均差异无统计学意义(P>0.05)。结论:当最小FA设为0.18时,纤维示踪得到的女性盆底肌三维结构显示最佳,DTI和DTT可评估孕产史对女性盆底肌的影响。Objective To investigates the feasibility of diffusion tensor imaging（DTI） and diffusion tensor tracking（DTT） for evaluation of the effect of childbearing history on female pelvic floor muscles.Methods Fortysix healthy females were divided into two groups：nulliparous and primiparous.MR conventional sequences and DTI were acquired.The optimized FA threshold value was obtained by regulating the FA to fiber tracking.The two groups were compared in terms of ADC,FA,VRA and T2-WT.Results （1）The DTT of FA 0.18 got the highest score in fiber tracking.（2）The ADC of nulliparous subjects and the subjects who had given birth were（1.24±0.11）×10^-3 mm^2/s,（1.33±0.11）×10^-3 mm^2/s（P=0.017）.There were no statistical differences in FA,VRA and T2-WT between the two groups（P〉0.05）.Conclusions The optimized FA threshold of fiber tracking in pelvic floor muscles is 0.18.DTI and DTT may be used to evaluate the effect of childbearing history on female pelvic floor muscles.

关 键 词：盆底肌 DTI DTT 孕产史 

分 类 号：R711.5[医药卫生—妇产科学]