Thanks for your question on Healthcare Magic.
I can understand your concern.
Your x ray reports are mostly due to old, fibrotic densities.
You might be having
lung infection like (
pneumonia or
tuberculosis) in the past and now after healing it is showing old densities.
Since these are old, healed lesions, you will not show any symptoms like cough, expectoration.
So in my opinion, if you want to clear medical examination then get done CT thorax and
bronchoscopy.
CT scan is more reliable for old densities as compare to chest x ray.
Bronchoscopy is more appropriate to rule out active lung infection.
If both of them are normal then no need to worry for active lung infection and so you well get medical clearance easily.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.