bronchiolitis with air trapping can have appearance of decreased lung density on expiration


  • on expiration, normal lung becomes denser and whiter. Abnormal lung remains dark.

Chest CT (axial views): respiratory bronchiolitis-associated interstitial lung disease (RB-ILD).

CT findings in RB-ILD commonly consist of patchy ground glass opacities, centrilobular nodules, and air trapping. 1

Footnotes

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