Fibrocalcific lesions seen in your chest x ray
may be healed old pulmonary tuberculosis
especialy if you are not having any constitutional symptoms. Still the possibility of tuberculosis relapse cant be rule out by just doing a chest x ray. If worried much about the disease, you can go for Mycobacterial cultre to confirm if any growth occur, otherwise you are fine and get a followup chest x ray after 3 months.