Hi ! Your CT scan
does suggest that the density could be of infectious etiology, but does not confirm it nor it confirms about the tuberculosis
. Your treating doctor must have started the medications on multiple factors like your history, clinical examination and other blood and radiological investigations. He advised for repeat X ray
to see the effect of treatment started on the ovoid density. Many a times tubercular patches are confirmed by a therapeutic trial when no investigations could confirm it otherwise.
Wishing you an early recovery.