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目的探讨核磁共振与超声在胎儿小脑延髓池增宽(Broadening cisterna magna)中的诊断价值。方法经超声检查怀疑胎儿小脑延髓池增宽的孕妇24例,在系统超声检查后48小时内进行胎儿MRI检查。将MRI、超声、随访结果进行对照比较研究。结果 22名孕妇共检查出胎儿24例,MRI证实胎儿小脑延髓池增宽22例,占超声诊断的91.7%(22/24),合并中枢神经其他异常者12例,其中胼胝体发育不良1例,侧脑室增宽4例,Dandy-Walke7例,检出超声漏诊合并侧脑室增宽2例,胼胝体发育不良1例,Dandy-Walker畸形2例。结论核磁共振检查对小脑延髓池增宽的诊断价值明显高于超声,有助于明确诊断胎儿小脑延髓池增宽和合并畸形的诊断。
Objective To investigate the diagnostic value of magnetic resonance imaging and ultrasound in Broadening cisterna magna. Methods Twenty-four pregnant women suspected of having a widened cerebellar cisternia were examined by sonography. Fetal MRI was performed within 48 hours after system ultrasound examination. MRI, ultrasound, follow-up results were compared with the control study. Results Totally 24 fetuses were detected in 22 pregnant women. MRI showed that 22 cases of fetal cerebellomedullary cistern widened, accounting for 91.7% (22/24) of ultrasound diagnosis, and 12 cases of other abnormalities of central nervous system, including 1 case of corpus callosum dysplasia, 4 cases of lateral ventricle widening, Dandy-Walke7 cases, detection of missed diagnosis of ultrasound combined with lateral ventricular enlargement in 2 cases, corpus callosum dysplasia in 1 case, Dandy-Walker malformation in 2 cases. Conclusion The diagnostic value of MRI in the cerebellar cisterna broadenis is obviously higher than that of ultrasound, which is helpful to diagnose the widening of cerebellomedullary cistern and deformity.