Purpose or Case Report: Pediatric inflammatory bowel disease (IBD) poses significant challenges in diagnosis and management, particularly concerning the use of gadolinium-based contrast agents in magnetic resonance enterography (MRE). This study aimed to evaluate the efficacy of diffusion-weighted imaging (DWI) compared to contrast-enhanced sequences in detecting active inflammation in pediatric IBD, with a focus on minimizing gadolinium exposure.
Methods & Materials: A sub-study was conducted within a larger prospective cohort of pediatric IBD patients. MRE imaging data from 50 patients were analyzed using a standardized protocol. Two separate sessions involved blinded review of DWI and contrast-enhanced sequences by experienced reviewers, followed by statistical analysis to assess correlation and inter-rater reliability.
Results: Strong correlation was observed between DWI and contrast-enhanced sequences in detecting active inflammation, except in the jejunum. Penetrating complications were accurately detected by both methods, with contrast-enhanced imaging providing superior anatomical delineation in certain cases. Inter-rater reliability analysis showed moderate to fair agreement among reviewers.
Conclusions: DWI shows promise as a non-invasive alternative to contrast-enhanced sequences in initial assessments of pediatric IBD, potentially reducing the need for gadolinium. However, contrast-enhanced sequences remain crucial in specific scenarios, highlighting the importance of tailored imaging protocols. Further research is warranted to validate these findings and optimize imaging strategies in pediatric IBD management.