"peripheral vessels: if vessels in hypoattenuated regions of the lung are smaller than in the other regions, the pattern is due to mosaic perfusion (i.e. airways or vascular disease rather than ground-glass)"
"central vessels: pulmonary hypertension, reflected as dilatation of the central pulmonary arteries, suggests a vascular cause"
"small airways: the presence of abnormally dilated or thick walled airways in the relatively lucent lung confirms underlying airway disease, see small airways disease"
"parenchymal changes: ground glass opacity is the likely cause for mosaic attenuation if other features of the infiltrative disease are present, such as reticular opacities (i.e. crazy paving pattern) or nodules"
"air trapping: refers to regions of the lung which following expiration do not show the normal increase in attenuation, or show little change in cross-sectional area 5 (i.e. this is an expiratory HRCT finding); the presence of air trapping suggests airway disease"
"occlusive vascular disease causes mosaic perfusion 7"
"occlusive vascular disease causes mosaic perfusion 7"
"multifocal disease causing ground glass opacity in a mosaic pattern is commonly (about 50% 5) due to"
"obstructive small airways disease (air-trapping plus secondary vasoconstriction)"
"regional air-trapping causes abnormally low attenuation, exacerbated by reflex vasoconstriction; low attenuation is maintained on expiratory CT in contrast to the increased attenuation of normal lung 5,10"
"air trapping: refers to regions of the lung which following expiration do not show the normal increase in attenuation, or show little change in cross-sectional area 5 (i.e. this is an expiratory HRCT finding); the presence of air trapping suggests airway disease"