Fetal brain MR imaging.

Area of Science:

• Radiology
• Neuroimaging
• Prenatal Diagnosis

Background:

• Magnetic Resonance (MR) imaging and faster techniques have significantly advanced in-utero fetal brain imaging over the last decade.
• Prenatal diagnosis of complex fetal brain abnormalities is now feasible through detailed analysis of morphology and signal characteristics.

Purpose of the Study:

• To illustrate and discuss major fetal brain malformations and associated morphologic changes.
• To review destructive lesions and isolated ventriculomegalies in the fetal brain.
• To provide an overview of the advantages and disadvantages of T1 and T2 MR imaging sequences for fetal brain assessment.

Main Methods:

• Review of neuroimaging literature focusing on in-utero fetal brain MR imaging.
• Analysis of illustrative cases demonstrating normal brain development and various pathologies.
• Discussion of T1 and T2 weighted imaging sequences and their utility.

Main Results:

• Detailed illustration of normal fetal brain development as a baseline for comparison.
• Comprehensive discussion of major brain malformations, including specific morphologic changes.
• Categorization and description of destructive lesions and isolated ventriculomegalies.
• Comparative analysis of T1 and T2 sequences for fetal brain imaging.

Conclusions:

• In-utero fetal brain MRI is a powerful tool for diagnosing complex brain abnormalities prenatally.
• Understanding normal development and specific imaging features is crucial for accurate diagnosis.
• Knowledge of sequence-specific advantages and limitations aids in optimizing fetal MR imaging protocols.