You took anti T B treatment for 6 months time . Ideally according to W H O this time is standard time for healing of tubercular lesions in lungs . But in your case still a scar present ( according to your doctor it will heal spontaneously in time ) i.e. fresh lesion ( as I understood ) . 2nd thing in your case is elevated level of E S R that is 60 mm 1st hour.
Other symptoms are present or not , you didn't mention .
When such type of patient visit with these findings I suggest them to take anti tubercular treatment for another 3 - 6 months .
I also advise them to tale "levofloxacin
750 mg /day but in the evening with pantaloc-d to avoid nausea
W H O also recommend levofloxacin for effective treatment of tuberculosis
Scar tissue may be a fresh lesion so still tuberculosis may present.
Hope this information will help you.