ABSTRACT
Objective To study the application value of three-dimensional transabdominal ultrasound VCI-C imaging in detection of fetal cerebellar vermis.Methods Totally 300 normal fetuses at 18 ～ 36 gestation weeks were examined by three-dimensional ultrasound VCI-C imaging to observe the fetal cerebellar vermis.Results The view of three-dimensional ultrasound VCI-C imaging well evaluated the integrity and size of vermis morphous,identified characteristic signs of vermis:the fourth ventricle apex and vermis crack.The brain stem and vermis were almost parallel in normal fetus.The angle between them was (3.89 ± 1.58)°.There was no significant relation between the gestational age and the angle.The craniocaudal diameter,anteroposte diameter and acreage of the cerebellar vermis were positively correlated with gestational age.Conclusion The three-dimensional ultrasound VCI-C imaging could help evaluate the development of the cerebellar vermis and show the information of cerebellar vermis and its surrounding structure.It offers a new method to evaluate the fetal cerebellar vermis.