Written by Vivian Lei
Spoon Feed
Fast brain MRI protocol for pediatric nontraumatic neurologic emergencies was associated with fewer missed pathologic findings and higher diagnostic sensitivity than head CT, without increasing ED or hospital length of stay. It appears to be a feasible, radiation-sparing first-line imaging option in centers with appropriate access.
Fast MRI first?
This prospective cohort subanalysis compares fast brain MRI with head CT for children presenting to the ED with nontraumatic neurologic complaints. The fast MRI protocol used abbreviated sequences (DWI, FLAIR, and SWI) designed to detect acute intracranial pathology in under 10 minutes. Investigators compared 159 children who underwent fast MRI with matched cohorts of children receiving head CT.
Fast MRI demonstrated superior diagnostic performance compared with CT. Missed pathology occurred less frequently with fast MRI (1.8% vs. 8.5%), with particularly improved detection of vascular and inflammatory pathology. Sensitivity and negative predictive value were substantially higher for fast MRI (95.8% and 98.2%) than for CT (63.0% and 91.5%). Despite longer image acquisition times after ordering, overall ED length of stay, hospital length of stay, and admission rates were similar between groups. Additionally, children undergoing fast MRI required less anesthesia for follow-up imaging.
Limitations include single-center design, possible selection bias related to an institutional stroke pathway, and lack of full MRI confirmation in all patients. The authors highlight potential overuse of CT in low-yield presentations and call for clinical prediction tools to guide imaging decisions, while noting implementation challenges related to MRI availability and resources.
How will this change my practice?
This study provides compelling evidence that fast brain MRI may offer meaningful diagnostic advantages over head CT for selected pediatric patients with nontraumatic neurologic emergencies. However, the findings are probably best viewed as practice-informing rather than definitively practice-changing given study limitations. Additional multicenter studies are needed to determine generalizability, operational feasibility, and cost-effectiveness before widespread adoption.
Source
Fast MRI Compared With Head CT in Evaluating Pediatric Neurologic Emergencies. Pediatrics. 2026 Apr 1:e2024068363. doi: 10.1542/peds.2024-068363. Epub ahead of print. PMID: 41916585.
