[A quantitative evaluation of brain computerized tomography in children using color image analyzer]

Area of Science:

• Neuroradiology
• Pediatric Imaging
• Quantitative Image Analysis

Background:

• Accurate quantitative assessment of brain structures in pediatric computerized tomographic (CT) scans is crucial for diagnosing atrophy and monitoring treatment effects.
• Traditional visual evaluations and established ratios like Evans ratio have limitations in precisely quantifying subtle changes.

Purpose of the Study:

• To quantitatively analyze brain computerized tomographic (CT) scans in children using Color Image Analyzer.
• To correlate measurements of subarachnoid spaces, ventricles, and cerebellum with established atrophy scores and evaluate brain shrinkage post-ACTH therapy.

Main Methods:

• Reviewed 167 pediatric brain CT scans, measuring subarachnoid space (SAS) areas on specific slices (A, B, C).
• Compared SAS measurements (SAS A%, SAS B%, SAS C%) with Evans ratio, Cella Media Index, and cerebellar atrophy scores.
• Analyzed serial CT scans of eight patients with infantile spasms to assess brain shrinkage after ACTH therapy.

Main Results:

• Higher SAS A% and SAS B% were significantly associated with severe brain atrophy.
• Linear relationships were found between Evans ratio and SAS A%, Cella Media Index and lateral ventricle/intracranial area ratio, and cerebellar atrophy score and SAS C%.
• Younger children (<1.5 years) exhibited greater SAS A% and SAS B%, suggesting age-related physiological changes.

Conclusions:

• Quantitative analysis of subarachnoid spaces on CT scans effectively correlates with brain atrophy severity and age-related changes in children.
• Subarachnoid space measurements provide valuable insights into physiological brain development and shrinkage following therapeutic interventions like ACTH therapy.