Cavity, bulla, blebs, abscess in a Chest Xray- How to differentiate?

Cavities, bulla , blebs and lung cysts are common things in Xray of chest. This video is about how to differentiate these things. Time- codes- 00:00- Query 00:39- Intro 00:46- Bulla 02:23- Cavity and abscess 03:26- Benign vs Malignant Cavity 05:03- Pneumatocele 05:26- Bronchiectasis 05:55- Query answer