The prerequisite for endoscopic sinus surgery is
Endoscopic surgery of inflammatory diseases of paranasal sinuses (sinusitis or polyp) requires a very detailed preoperative knowledge of the individual anatomical conditions and pathological changesCT scan is used best to visualize sinus areasCT scan provides an excellent definition of paranasal sinuses and is a prerequisite for endoscopic surgeryRef: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 220 - 221
MRI of paranasal sinuses
CT of paranasal sinuses
Mucocilliary clearing testing
Acoustic tests
Nose and paranasal sinuses