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Diffusion Imaging in the Rat Cervical Spinal Cord
Published on: April 7, 2015
Nonaccidental pediatric head injury: diffusion-weighted imaging findings
D Y Suh1, P C Davis, K L Hopkins
1Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia 30322, USA. sherry_ballenger@emory.org
Insights
Diffusion-weighted imaging (DWI) detects early brain injury in children with nonaccidental head trauma, outperforming conventional MRI. This advanced imaging technique aids in identifying severe cases and predicting poor outcomes.
Area of Science:
- Pediatric Radiology
- Neuroradiology
- Medical Imaging
Background:
- Nonaccidental head trauma in children is a critical diagnostic challenge.
- Conventional imaging modalities may not detect early signs of injury.
- Diffusion-weighted imaging (DWI) shows promise for early detection of nonhemorrhagic infarction.
Purpose of the Study:
- To evaluate the diagnostic utility of DWI in children with suspected nonaccidental head trauma.
- To compare the sensitivity of DWI with conventional MRI and CT scans.
- To assess the correlation between DWI findings and patient outcomes.
Main Methods:
- Retrospective review of medical records and imaging for children under 2 years with suspected nonaccidental head injury.
- Inclusion of 20 children who underwent DWI within 5 days of presentation.
- Evaluation of CT scans, conventional MRI sequences, and DWI with apparent diffusion coefficient (ADC) maps.
Main Results:
- DWI/ADC abnormalities were detected in 89% of children with presumed nonaccidental head trauma.
- DWI revealed more extensive or previously undetected injuries in 81% of positive cases compared to conventional MRI.
- DWI/ADC findings correlated significantly with poor outcomes and identified injury patterns in posterior cerebral hemispheres.
Conclusions:
- DWI is valuable for early detection of infarction in nonaccidental head injury, enhancing conventional MRI sensitivity.
- Early DWI provides a more complete severity assessment than other imaging modalities.
- DWI can help identify high-risk children and guide management decisions for improved outcomes.
Objective:
Diffusion-weighted imaging (DWI) reveals nonhemorrhagic posttraumatic infarction hours to days before conventional computed tomographic scanning or magnetic resonance imaging (MRI). We evaluated the diagnostic utility of DWI in children with nonaccidental head trauma.
Methods:
The medical records and imaging examinations obtained between January 1998 and May 2000 for all children less than 2 years of age with presumed or suspected nonaccidental head injury were reviewed retrospectively. Twenty children who had undergone DWI within 5 days of presentation were included in the study. Computed tomographic scans, conventional MRI sequences, and DWI combined with apparent diffusion coefficient (ADC) maps were evaluated.
Results:
Eleven girls and nine boys (median age, 5 mo) were studied. Eighteen children had presumed nonaccidental head trauma, and two children had suspected nonaccidental head trauma. Of the 18 children with presumed nonaccidental trauma, 16 (89%) demonstrated abnormalities on DWI/ADC, as compared with neither of the two children with suspected nonaccidental trauma. In 13 (81%) of 16 positive cases, DWI revealed more extensive brain injury than was demonstrated on conventional MRI sequences or showed injuries not observed on conventional MRI. DWI combined with ADC maps allowed better delineation of the extent of white matter injury. DWI/ADC abnormalities in the nonaccidental head-injured children were likely to involve posterior aspects of the cerebral hemispheres, with relative sparing of the frontal and temporal poles. Severity on DWI correlated significantly with poor outcome (P < 0.005).
Conclusion:
DWI has broad applications in the early detection of infarction in children with nonaccidental head injury and enhances the sensitivity of conventional MRI. In the patients in this study, early DWI provided an indicator of severity that was more complete than any other imaging modality. The use of DWI may help to identify children at high risk for poor outcome and to guide management decisions.
