Computed tomography scans of paranasal sinuses before functional endoscopic sinus surgery

Figure 1 Coronal computed tomography reformat of the paranasal sinuses. A: Coronal computed tomography (CT) reformat of the paranasal sinuses. Normal sinuses. No evidence of sinusitis; B: Coronal CT reformat of the paranasal sinuses in a different patient demonstrating chronic sinusitis as evidenced by osteomeatal complex disease (upper two arrows) and mucosal thickening in the maxillary sinuses (lower two arrows).