ABSTRACT
The brain is one of the most challenging areas to image in the fetus. This is due to the fact that for a full evaluation, several planes are required, and those planes are not parallel to each other. One of the biggest challenges in imaging the fetal brain is visualizing the corpus callosum, especially in cases of ventriculomegaly where it must be assessed to rule out agenesis of the corpus callosum. Using Three-dimensional (3D) ultrasound in the study of the fetal brain is further complicated by the changing anatomy with advancing gestation in addition to the complex anomalies that distort most major anatomical landmarks. Combining tomographic ultrasound imaging with volume contrast imaging results in marked improvement in the quality of the images. As such, learning how to properly utilize the various 3D techniques and modalities is invaluable in the evaluation of the fetal brain.
