Figure 1.

Preoperative thin slice CT examination of paranasal sinus in patients 1, 2 and 3: patients 1 (A, D, G, J), 2 (B, E, H, K), 3 (C, F, I, L), horizontal (A–C), coronal (D–F), and sagittal left (G–I) and right (J–L).

Preoperative thin slice CT examination of paranasal sinus in patients 1, 2 and 3: patients 1 (A, D, G, J), 2 (B, E, H, K), 3 (C, F, I, L), horizontal (A–C), coronal (D–F), and sagittal left (G–I) and right (J–L).