Thanks for your question on HCM. Atelectesis and fibrosis are two different things. Atelectesis is partial collapse. While fibrosis is dead tissue , seen after healing. And both can be seen after TB infection. When atelectesis involves terminal bronchioles, it is known as subsegmental atelectesis. And the most common cause for this is retained secretions. So for visa purpose, I advice you to consult pulmonologist and get done CT THORAX and Bronchoscopy and BAL ( Broncho Alveolar Lavage ) analysis for TB. As both will be needed to rule out active TB infection.