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Normal frontal lobe gray matter-white matter CT volume ratio in children
Insights
Researchers established a normal gray matter to white matter volume ratio in children using computed tomography. This ratio provides a baseline for diagnosing developmental disorders like white matter hypoplasia.
Area of Science:
- Neuroimaging
- Pediatric Neurology
Background:
- Establishing normative data for brain development is crucial for identifying abnormalities.
- Developmental disorders can significantly impact gray matter to white matter volume ratios.
Purpose of the Study:
- To determine a computed tomographic (CT) value for the normal gray matter to white matter (G/W) volume ratio in children.
- To establish a baseline for studying pediatric developmental disorders, including white matter hypoplasia.
Main Methods:
- Reviewed cranial CT scans of 150 children aged 16 or younger with normal findings.
- Excluded 119 subjects, leaving 31 presumed to have normal brains.
- Calculated gray and white matter volumes from frontal slices using region of interest tracing superior and ventral to the foramen of Munro.
Main Results:
- A normal gray matter to white matter (G/W) volume ratio of 2.010 (sigma = 0.349) was derived from 31 children.
- This ratio represents a potential quantitative marker for normal brain development in pediatric populations.
Conclusions:
- The derived G/W ratio serves as a potential normative value for pediatric brain imaging.
- Further research is needed to ascertain the full clinical utility of this ratio in diagnosing developmental disorders.
Abstract:
We attempted to establish a computed tomographic value representing the normal volume ratio of gray matter to white matter (G/W) in children in order to have a baseline for studying various developmental disorders such as white matter hypoplasia. The records of 150 children 16 years of age or younger who had normal cranial computed tomography were reviewed. From these a group of 119 were excluded for various reasons. The remaining 31 were presumed to have normal brains. Using the region of interest function for tracing gray and white matter boundaries, superior and ventral to the foramen of Munro area, measurements were determined for consecutive adjacent frontal slices. Volumes were then calculated for both gray and white matter. A volume ratio of 2.010 (sigma = 0.349), G/W, was then derived from each of 31 children. The clinical value of this ratio will be determined by future investigation.