If I understood your problem correctly: your mother has been started on anti-tuberculous medication on the basis of a CT and MRI
scan of the brain. Even with the medication you are worried that her convulsions are continuing and the right sided weakness is continuing. All medicines take some time to act and for the limb weakness to improve it would take some time.
However, the diagnosis of tuberculoma
has been made on imaging grounds and if the disease is not responding to medications, then it would be appropriate to consider to get a tissue diagnosis- i.e operate to get a sample of tissue from the brain to confirm the diagnosis.
Hope this answers your question.