Susceptibility weighted imaging: neuropsychologic outcome and pediatric head injury
Talin Babikian1, M Catherin Freier, Karen A Tong
1Department of Psychology, Loma Linda University, Loma Linda, California, USA.
Insights
Susceptibility weighted imaging effectively predicts long-term cognitive outcomes in pediatric traumatic brain injury (TBI). Lesion volume on SWI imaging explains significant variance in neuropsychologic functioning years after injury.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Radiology
Background:
- Traumatic brain injury (TBI) is a common cause of pediatric neurologic disability.
- Neuropsychologic deficits significantly impact children and adolescents post-TBI.
- Accurate prognostication is crucial for effective TBI management in children.
Purpose of the Study:
- To evaluate susceptibility weighted imaging (SWI) as a predictor of long-term neuropsychologic functioning after pediatric TBI.
- To compare the efficacy of SWI with magnetic resonance spectroscopic imaging (MRSI) in predicting outcomes.
- To identify imaging biomarkers associated with cognitive deficits post-TBI.
Main Methods:
- SWI and MRSI were acquired in 18 pediatric TBI patients 6 ± 4 days post-injury.
- Neuropsychologic functioning was assessed 1–4 years after injury.
- Correlation and regression analyses were used to determine the relationship between imaging findings and cognitive performance.
Main Results:
- A significant negative correlation was found between lesion number/volume and neuropsychologic functioning.
- Lesion volume on SWI explained over 32% of the variance in cognitive performance.
- SWI explained additional variance beyond injury severity, age at injury, and MRSI metabolite variables.
Conclusions:
- SWI is a valuable tool for predicting long-term neuropsychologic outcomes in pediatric TBI.
- Improved detection of diffuse axonal injury with SWI enhances understanding of TBI's long-term effects.
- SWI can improve prognostic accuracy and guide treatment planning for pediatric TBI survivors.
Abstract:
Traumatic brain injury is among the most frequent pediatric neurologic disorders in the United States, affecting multiple aspects of neuropsychologic functioning. This study assessed the efficacy of susceptibility weighted imaging as a predictor of long-term neuropsychologic functioning after pediatric brain injury compared with magnetic resonance spectroscopic imaging. Susceptibility weighted imaging is a relatively new method that is considered superior to traditional magnetic resonance imaging sequences for detecting hemorrhagic diffuse axonal injury. In this study, imaging and spectroscopy were acquired 6 +/- 4 days after injury. Measures of neuropsychologic functioning were administered to 18 children and adolescents 1-4 years post injury. Negative correlations between lesion number and volume with neuropsychologic functioning were demonstrated. Lesion volume explained over 32% of the variance in cognitive performance, explaining at least an additional 20% beyond injury severity and age at injury alone and 19% beyond magnetic resonance spectroscopic metabolite variables. Exploratory analyses resulted in notable trends, with lesions in deeper brain regions more strongly associated with poorer neuropsychologic performance. Improved detection of the extent of diffuse axonal injury following a brain injury will allow for a better understanding of its association with long-term outcome, which in turn can improve prognostic efficacy for effective treatment planning.
