Hi, after the 6months medication,you would be required to do sputum culture test and another chest X-ray. If it's all clear,that would be all,but if the IRCC medical team are still sceptical about the X-ray,you might be told to do another chest X-ray after 3months. In my case,after completing the 6months medication,I went for Sputum culture test and Chest x-ray. Culture results came out negative as well as smear results but they were not convinced about the chest X-ray. Another X-ray was requested after 3months. They were still not satisfied with it and I was told to do another Sputum culture test,Chest X-ray after 3months and see a chest physician to rule out incomplete treatment.I'm done with all those now and I finally passed my medical in Feb,2020. Mind you,I started my TB medication on the 16th of Feb,2019 and completed it August 2nd. All the best!