In this study, we evaluated quantitatively preoperative coronal CT scan in 30 nasal cavities of 22 patients with chronic sinusitis who underwent functional endoscopic sinus surgery. The ciliated area of the osteomeatal complex (OMC) from these patients was quantitatively observed by scanning electron microscope and image analysis. Our results showed a positive correlation between ciliary epithelial pathological changes in OMC and disease degree of this area in CT scan.