Bullae vs bronchiectasis

How can we distinguish bullae and bronchiectasis on CXR? Follow-up from my year 1 medical student lecture revising CXR interpretation. Radiopaedia case playlist from the session: https://radiopaedia.org/playlists/98283 Pulmonary bulla: https://radiopaedia.org/articles/pulm... Bronchiectasis summary (for med students): https://radiopaedia.org/articles/bron... Bronchiectasis: https://radiopaedia.org/articles/bron...