摘要
目的通过MRI测量正常胎儿后颅窝各指标值,推算正常值参考范围。方法对242胎胎龄28～40周胎儿以1.5T MR仪行头部成像。用Image J Basics(Version 1.38)软件分别于正中矢状面T2WI测量小脑前后径、上下径、正中矢状面小脑面积及脑外间隙,并进行统计学分析。结果正中矢状面胎儿小脑上下径、前后径及小脑面积的95%可信区间分别为19.87～20.72mm、15.50～16.50mm、316.25～338.87mm2。小脑前后径、上下径,正中矢状面小脑面积与胎龄呈正相关(r2=0.846、0.826、0.865,P均<0.05);胎儿正中矢状面后颅窝脑外间隙95%可信区间为5.48～6.01mm,与胎龄无明显相关(r2=0.032,P>0.05)。结论 MRI可评价胎儿后颅窝结构,为围产期评估后颅窝发育状况提供重要参考依据。
Objective To measure the main dimensions of fetal normal posterior cranial fossa with MRI, and to obtain the ranges of their normal values. Methods Data of 1.5T head MRI of 242 fetuses in 28-40 gestational weeks were collected. The cerebellar anteroposterior diameter, vermis length, cerebellar sagittal area and extracerebral space were calculated using Image J Basics software, and statistical analysis of these data was performed. Results The 95% confidence interval of anteroposterior diameter, vermis length and cerebellar sagittal area was 19.87-20.72 mm, 15.50-16.50 mm and 316.25-338.87 mm2, respectively. The anteroposterior diameter, vermis length, cerebellar sagittal area and FA （in weeks） had positive correlation with gestational age （r2=0.846, 0.826, 0.865, all P〈0.05）. The 95% confidence intervals of extracerebral space in the median sagittal plane was 5.48-6.01 mm, not correlated with gestational age （r2=0.032, P〉0.05 ）. Conclusion The development of fetal normal posterior cranial fossa can be displayed and quantified by 1.5T MRI, which is valuable for clinical diagnosis and evaluation on fetal development.
出处
《中国介入影像与治疗学》
CSCD
2013年第8期473-476,共4页
Chinese Journal of Interventional Imaging and Therapy
基金
辽宁省2008年度高等学校创新科技团队基金(2008T200)
关键词
胎儿
颅窝
后
磁共振成像
Fetus
Cranial fossa, posterior
Magnetic resonance imaging
