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目的探讨三维超声对胎儿小脑蚓部发育异常的诊断方法及临床应用价值。方法选取2013年1月至10月在二维超声检查中发现可疑小脑蚓部异常的64例胎儿,采用彩色多普勒超声诊断仪,应用三维超声来诊断检查胎儿小脑蚓部的正中矢状切面及其相关结构。结果二维扫查和三维成像两种方法显示小脑蚓部的成功率分别为34.38%和90.62%,两种扫描方式获取小脑蚓部矢状面的影像效果比较差异有统计学意义(P<0.01);58例小脑蚓部发育过小10例,Dandy-Walker畸形8例,小脑蚓部上抬14例,单纯颅后窝池增宽18例,第四脑室导水管梗阻8例。结论运用三维超声可清晰显示透明隔腔、胼胝体和小脑蚓部、丘脑和枕大池等结构,可客观评估胎儿小脑蚓部的发育状况,方法有效,对诊断胎儿小脑蚓部发育异常具有重要的临床价值。
Objective To investigate the diagnostic value and clinical value of three-dimensional ultrasound in the development of fetal cerebellar vermis. Methods Sixty-four fetuses with abnormal vermis in the two-dimensional ultrasonography were selected from January 2013 to October 2013. The color Doppler ultrasound was used to diagnose the median sagittal section of the cerebellar vermis. And its related structure. Results Two-dimensional scanning and three-dimensional imaging showed that the successful rates of cerebellar vermis were 34.38% and 90.62%, respectively. There was significant difference between the two scanning methods in obtaining cerebellar vermis sagittal image (P <0.01) ); 58 cases of cerebellar vermis were underdeveloped in 10 cases, Dandy-Walker deformity in 8 cases, cerebellar vermis uplift in 14 cases, simple cranial hedgerow enlargement in 18 cases, the fourth ventricular aqueduct obstruction in 8 cases. Conclusion Three-dimensional ultrasonography can clearly show the structures of the transparent compartment, the corpus callosum and cerebellar vermis, the thalamus and the occipital cistern. It can evaluate the development of the vermis of the cerebellar cerebrum objectively and effectively. It is an important clinical tool for the diagnosis of abnormalities of vermis value.