High Resolution CT > Findings > Mosaic Attenuation


Mosaic perfusion refers to areas of decreased attenuation which results from regional differences in lung perfusion secondary to airway disease or pulmonary vascular disease. Distribution is often patch, hence the designation "mosaic." Often with mosaic perfusion, the pulmonary arteries will be reduced in size in the lucent lung fields thus allowing mosaic perfusion to be distinguished from ground-glass opacities.


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