Expiratory Volumetric MDCT Evaluation of Air Trapping in Pediatric Patients With and Without Tracheomalacia

摘要: OBJECTIVE. The purpose of this study was to use paired inspiratory–expiratory volumetric MDCT compare the frequency, severity, and pattern air trapping in pediatric patients with tracheomalacia findings children without tracheomalacia.MATERIALS AND METHODS. group consisted 15 consecutively registered (younger than 18 years) who had tracheomalacia, defined as 50% or greater reduction tracheal cross-sectional luminal area between end inspiration expiration, diagnosed confirmed bronchoscopy. comparison evidence at Two blinded radiologists working consensus interpreted randomly viewed end-expiratory thin-section CT images both groups for presence, three anatomic levels (upper, middle, lower lung zones). severity wa...