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