Bronchiectasis refers to the dilatation of the small airways leading to difficulty in breathing. High-resolution CT is typically the diagnostic modality of choice for bronchiectasis. Following findings are usually demonstrated on CT: - diameter of bronchus 1.5 times greater than that of pulmonary artery - failure of bronchial tapering - thickened bronchial walls - loss of lobar volume - cysts with defined borders Reference: https://www.wikidoc.org/index.php/Bronchiectasis_CT Image via: https://www.wikidoc.org/index.php/Bronchiectasis_CT -