Thanks for your question on Health Care Magic.
I can understand your concern.
Yes, old, healed TB scar can be the reason for your visa rejection.
To avoid this rejection, we need to prove that these lesions on chest
x ray are not active infectious lesions.
And for this, you need to
consult pulmonologist and get done CT thorax with Contrast and
bronchoscopy with BAL (
bronchoalveolar lavage) analysis.
If both these are negative for
tuberculosis than you can argue with visa authority about not having active, infectious disease and lesions on x ray are old, healed, inactive lesions.
So consult pulmonologist and discuss all these.
Hope I have solved your query.
Wish you good health. Thanks.