Imaging the pediatric liver: MRI and CT

Area of Science:

• Pediatric Radiology
• Medical Imaging
• Hepatology

Background:

• Accurate imaging of the pediatric liver is crucial for diagnosis and management of various conditions.
• Computed tomography (CT) and magnetic resonance imaging (MRI) are commonly used modalities, but their comparative efficacy in children requires ongoing evaluation.

Purpose of the Study:

• To compare the diagnostic performance of MRI and CT in evaluating the pediatric liver across different age groups and disease types.
• To assess the ability of each modality to visualize intrahepatic venous anatomy and detect focal and diffuse liver lesions.

Main Methods:

• Retrospective review of MRI and CT scans from 27 pediatric patients (2 weeks to 16 years old) with normal or diseased livers.
• Analysis of image quality, lesion detection rates, and visualization of intrahepatic venous structures.

Main Results:

• MRI demonstrated superior visualization of normal intrahepatic venous anatomy compared to CT, irrespective of disease presence, type, or patient age.
• Focal hepatic lesions appeared iso- or hypointense on T1-weighted and hyperintense on T2-weighted MRI sequences.
• MRI detected three lesions missed by CT, and correctly identified two cases where CT was equivocal or abnormal, revealing normal liver parenchyma.

Conclusions:

• MRI is a more sensitive imaging technique than CT for evaluating the pediatric liver, particularly for venous anatomy and lesion detection.
• MRI offers significant advantages in pediatric liver imaging, potentially replacing CT in many clinical scenarios, especially for infants and young children.