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. 2021 Feb 25;3(1):e200279. doi: 10.1148/ryct.2021200279

Figure 7a:

Mosaic attenuation and air trapping. (a) Axial inspiratory CT scan demonstrates mosaic attenuation due to ground-glass opacity in a case of respiratory bronchiolitis-associated interstitial lung disease. (b) Axial inspiratory CT scan demonstrates mosaic attenuation due to small airways disease in a case of constrictive bronchiolitis. (c) Axial expiratory CT imaging (same patient as b) demonstrates accentuation of the areas of hyperlucency from the adjacent lung, confirming small airways disease as the cause of mosaic attenuation.

Mosaic attenuation and air trapping. (a) Axial inspiratory CT scan demonstrates mosaic attenuation due to ground-glass opacity in a case of respiratory bronchiolitis-associated interstitial lung disease. (b) Axial inspiratory CT scan demonstrates mosaic attenuation due to small airways disease in a case of constrictive bronchiolitis. (c) Axial expiratory CT imaging (same patient as b) demonstrates accentuation of the areas of hyperlucency from the adjacent lung, confirming small airways disease as the cause of mosaic attenuation.