Quantitative CT and pulmonary function in children with post-infectious bronchiolitis obliterans.

Area of Science:

• Pediatric Pulmonology
• Radiology
• Medical Imaging

Background:

• Post-infectious bronchiolitis obliterans (PIBO) is a chronic lung disease in children.
• Accurate assessment of airway obstruction and air trapping is crucial for managing PIBO.

Purpose of the Study:

• To evaluate the feasibility of CT-based quantitative airway and air-trapping measurements in pediatric PIBO patients.
• To determine the correlation between these CT-derived parameters and pulmonary function test (PFT) results.

Main Methods:

• Retrospective analysis of chest CT scans and PFTs from 23 children with PIBO.
• Quantitative CT analysis of segmental and subsegmental bronchi (lumen, wall, and total area).
• Measurement of air-trapping volume (ATV) and correlation with PFTs (FEV1, reactance at 5 Hz).

Main Results:

• CT-based airway and air-trapping measurements were feasible in pediatric PIBO patients.
• Increased airway wall area negatively correlated with forced expiratory volume in one second (FEV1).
• Increased air-trapping volume (ATV) negatively correlated with FEV1 and positively correlated with reactance at 5 Hz.

Conclusions:

• CT-based quantitative airway and air-trapping measurements are feasible in children with PIBO.
• These quantitative CT parameters show significant correlation with pulmonary function, offering valuable insights for clinical assessment.