welcome to health care magic
Regarding your CT of paranasal sinuses
,,it reveals evidence of deviated nasal septum(DNS),,and chronic sinusistis..
If the DNS is mild don't worry about that,,if it is more and cosmetic disfigurement consult ENT specialist
and have correction,,normally it is done by surgery either septoplasty
For chronic sinusitis(sinusistis of more than 6 weeks duration) you need to take antibiotics for a longer duration..apart from that you should take corticosteriod nasal spray
to reduce the inflammation in the sinuses...
If the chronic sinusitis is not controlled with the above said medications,,then you have to undergo FESS functional endoscopic sinus surgery
Consult ENT specialist for further suggestions