MRI对正常胎儿标本小脑蚓部的测量

目的描述正常胎儿标本小脑蚓部在不同孕周的正常发育生长曲线。材料与方法使用3.0 T MRI对63例胎儿标本进行扫描,孕周15~40周,其中符合测量要求的为52例,扫描序列:T1WI、T2WI;扫描层面:矢状面、冠状面、横轴面;测量:小脑蚓前后径、上蚓高度及下蚓高度。对上述测量结果和孕周之间作回归分析。结果小脑蚓前后径、上蚓高度、下蚓高度与孕周分别呈线性正相关,上蚓高度稍大于下蚓高度,原裂和下后裂在多数正中矢状面上显示清晰,P0.05。结论胎儿小脑蚓部于17孕周以后在MRI上可显示其正常表现及发育生长规律。

MRI measurement of fetal cerebellar vermis development

Objectives: To study the growth curve of the fetal cerebellar vermis in different gestational age.Materials and Methods:Sixty-three fetuses (15— 40 gestational weeks) were scanned by 3.0 T magnetic resonance, in which 52 cases met the measurement requirements. Scanning sequence: T1WI, T2WI. Scanning plane: Sagittal, Coronal, Axial. Measurement: the antero-posterior diameter (APD), the height of anterior and posterior vermis. The linear regression between the gestational age and parameters mentioned above was analyzed.Results:The antero-posterior diameter, the height of anterior and posterior vermis were positively correlated with gestational age. The height of anterior vermis slightly higher than posterior vermis, the primary and infero-posterior ifssure could clearly displayed in the most middle sagittal plane, P<0.05.Conclusions:The normal performance and growth curve of the fetal cerebellar vermis can be described by MR imaging after 17 weeks.