Fig. 4.

Multiplanar reconstruction of computed tomography (CT) scan using OsiriX DICOM viewer. ( A ) parasagittal CT section, ( B ) oblique section for true coronal plane, ( C ) oblique section for true axial plane. Kuhn type 3 cell/IFAC supra agger frontal cell. MPR= multiplanar reconstruction, CT = computed tomography, IFAC= international frontal sinus anatomy classification.