Neuroimaging

摘要

Transvaginal high-resolution ultrasound and three-dimensional (3D) ultraosund have been establishingsonoembryology in the first trimester as well as neurosonography. Fetal brain is rapidly developing and changing itsappearance week by week during pregnancy. The brain is the most important organ but it is quite hard to observe detailedstructure of this organ by conventional transabdominal sonography. It is possible to observe the whole brain structure bymagnetic resonance imaging in the post half of pregnancy, but it is difficult in the first half of gestation and transvaginalhigh-resolution 3D ultrasound is the most powerful modality. As for brain vascularization, main arteries and veins havebeen demonstrated and evaluated in various CNS conditions. Transvaginal high-resolution 3D ultrasound can demonstratecerebral fine vascular anatomy such as medullary vessels and it is greatly expected to estimate neurological prognosis inrelation with vascular development during fetal period.