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An Abbreviated Non-Contrast MRI Protocol for Osteomyelitis May Reduce the Need for Sedation in Young Children
Ashishkumar K Parikh1, Edward J Richer2, Annie Shen3
1Department of Radiology, Children's Healthcare of Atlanta, Emory University, Atlanta, GA,.
Abstract:
Lengthy MRI examinations in young children often requires sedation. When sedation is unavailable, critical imaging may be delayed. Abbreviating the imaging protocol to a few essential sequences may reduce the need for sedation and prevent delays in patient care. We retrospectively evaluated an abbreviated noncontrast MRI protocol to diagnose lower extremity osteomyelitis in the pediatric population. The IRB approved this study. The radiology information system was searched for lower extremity MRI examinations for osteomyelitis in patients <20 years old from August 2020 to August 2021. Three noncontrast sequences (long axis T1 without fat saturation (FS), long axis STIR, and axial T2 with FS) were independently reviewed by 2 pediatric radiologists. The accuracy of the reviewers was compared to the clinical radiology report based on the unabridged contrast-enhanced standard department protocol. The search yielded 80 exams, mean age was 7 years old, 59% (47/80) were male, and 41% (33/80) were female. The accuracies of reviewer A and reviewer B were 95% and 89%, respectively. The reviewer inter-observer agreement for the diagnosis of osteomyelitis was strong (k = 0.79). The accuracy of an abbreviated noncontrast MRI protocol to evaluate lower extremity osteomyelitis in children approaches that of the unabridged protocol and has the potential to decrease the need for sedation in young children.
Insights
An abbreviated noncontrast MRI protocol for pediatric lower extremity osteomyelitis shows high accuracy, potentially reducing the need for sedation and preventing imaging delays in children.
Area of Science:
- Pediatric Radiology
- Musculoskeletal Imaging
- Medical Imaging Techniques
Background:
- Sedation is frequently required for lengthy MRI scans in young children, leading to potential delays in critical imaging when unavailable.
- Abbreviated MRI protocols may reduce sedation requirements and prevent patient care delays.
Purpose of the Study:
- To evaluate the diagnostic accuracy of an abbreviated noncontrast MRI protocol for pediatric lower extremity osteomyelitis.
- To determine if a shortened MRI protocol can maintain diagnostic efficacy compared to standard protocols.
Main Methods:
- Retrospective review of 80 pediatric lower extremity MRI exams for osteomyelitis (patients <20 years old).
- Analysis of three noncontrast sequences: long axis T1 without fat saturation (FS), long axis STIR, and axial T2 with FS.
- Independent review by two pediatric radiologists, compared against the unabridged, contrast-enhanced standard protocol.
Main Results:
- The abbreviated protocol achieved high diagnostic accuracies (Reviewer A: 95%, Reviewer B: 89%).
- Strong inter-observer agreement (k = 0.79) was observed for osteomyelitis diagnosis.
- The protocol demonstrated comparable accuracy to the standard, unabridged MRI protocol.
Conclusions:
- An abbreviated noncontrast MRI protocol is accurate for diagnosing pediatric lower extremity osteomyelitis.
- This shortened protocol has the potential to decrease the necessity for sedation in pediatric patients, thereby minimizing imaging delays.
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