Magnetic resonance imaging of the fetal brain

US remains the key imaging technique for prenatal screening of CNS pathology. However, MR imaging of the fetal brain is a powerful tool to further characterize CNS anomalies, especially during the third trimester. The prognosis of CNS anomalies detected at fetal MR imaging is not always known. As such, management may be problematic with regards to medical interruption of pregnancy. A multidisciplinary approach is essential in order to insure comprehensive evaluation and management of the pregnancy.