"Blebs appear as pleura-based thin walled gas-filled structures usually < 1 cm in diameter and most often seen at the lung apices. Coronal MinIPs improve detection."
"Pulmonary blebs are circumscribed pleurally based gas-filled cystic structures, usually less than 1 cm in diameter 4. There is an association with small airways disease 4. Rupture causes pneumothorax and is associated with tobacco smoking."