孕中晚期宫内胎儿脊柱腰骶段曲度变化的MRI研究  

MRI study on the curvature of the lumbosacral segment of fetal spine in the middle and third trimester of pregnancy

作　　者：任红 田迷迷 赵鹏 韩慧芝 林祥涛 REN Hong;TIAN Mimi;ZHAO Peng;HAN Huizhi;LIN Xiangtao(Department of Medical Imaging,Shandong Provincial Hospital Affiliated to Shandong First Medical University,Jinan 250021,China;Department of Medical Imaging,Shandong Provincial Hospital,Jinan 250021,China;Shandong University,Jinan 250012,China)

机构地区：[1]山东第一医科大学附属省立医院医学影像科,山东济南250021 [2]山东省立医院医学影像科,山东济南250021 [3]山东大学,山东济南250012

出　　处：《医学影像学杂志》2024年第2期87-90,共4页Journal of Medical Imaging

基　　金：山东省自然科学基金项目(编号:ZR2021MH216)。

摘　　要：目的探讨宫内胎儿脊柱腰骶段曲度随孕龄增长的变化规律。方法选取MRI证实腰骶椎体未见异常的胎儿63例,分为四组:24~27周、28~30周、31~34周、35~37周。测量参数:腰椎前凸角(lumbar lordosis angle,LLA)、腰骶前凸角(lumbosacral lordosis angle,LSLA)、骶骨倾斜角(sacral tilt,ST)、骶骨水平倾角(sacral inclination angle,SIA)。比较参数的差异性及相关性;绘制参数生长趋势图;建立线性回归方程。结果24~37周胎儿LLA值为(-20.5±9.1)°、LSLA值为(174.0±2.3)°、ST值为(-12.5±19.4)°、SIA值为(-19.5±17.8)°。参数均无性别差异;LLA与ST、SIA均呈正相关;ST与SIA呈正相关;LSLA与ST呈正相关;孕周与参数不相关。线性回归方程为LLA=0.219×ST-19.205(R^(2)=0.251,P<0.001)。结论胎儿腰椎后凸、65%胎儿骶骨前凸,胎儿有轻微腰骶前凸。推测胎儿骶骨进化是以S1为中心逐渐向后方旋转移动。Objective To investigate the changes of lumbosacral curvature of intrauterine fetus with gestational age.Methods Sixty-three fetuses with no abnormal lumbosacral vertebra confirmed by MRI were divided into four groups:24~27W,28~30W,31~34W,and 35~37W.Measurement parameters were as follows:Lumbar lordosis angle(LLA),Lumbosacral lordosis angle(LSLA),Sacral tilt(ST),and lumbar Lordosis Angle(LSLA),and Sacral inclination angle(SIA).The difference and correlation of parameters were compared and the growth trend chart was plotted.The linear regression equation was established.Results The LLA value,LSLA value,ST value and SIA value were(-20.5±9.1)°,(174.0±2.3)°,(-12.5±19.4)°and(-19.5±17.8)°respectively.There was no gender difference in parameters.LLA was positively correlated with ST and SIA.ST was positively correlated with SIA.LSLA was positively correlated with ST.Gestational age was not correlated with the parameters.The linear regression equation was LLA=0.219×ST-19.205(R^(2)=0.251,P<0.001).Conclusions In the present work,we clarify the existence mode of fetal lumbosacral segment curvature,establish the parameters for evaluating lumbosacral curvature,and infer the mode of fetal sacral evolution,which can be used as a reference for evaluating the development of fetal lumbosacral vertebrae and a better quantitative assessment of spinal development status.

关 键 词：宫内胎儿 腰骶曲度 腰椎前凸角 腰骶前凸 磁共振成像 

分 类 号：R714.5[医药卫生—妇产科学] R445.2[医药卫生—临床医学]