Hi, Good Day. Most of the people are usually exposed to many lung infections in their childhood. TB is one of the common ones. when it heals, it leaves the lung with these fibrotic areas and calcifications which was seen in your first X ray
film. It may not be an active disease and may persist like that. But sometimes it gets reactivated. Thats why you were asked to take the medicines. Now as you have completed the treatment course, I think you need not worry much. And the findings reported in next X ray could be just the left out scars
. You should follow up regularly and see a chest physicians. Montoux test being positive is not suggestive of active disease. If you are once infected with TB and antibodies
are there in your body, then also it comes positive. Though you may not have an active disease. So relax and just follow up regularly. Consult a chest physician whenever you have any symptoms related to that. All the best. Bye.