Optic Canal & Foramen
Parietoorbital Oblique (Rhese) IR Size: 8x10 LW SID: 40"" Page #'s: None,290	Positioning:   • Pt semi-prone or seated w/: affected side closest to film   • Face: 3 point landing zygoma (cheek), nose, & chin rest on bucky MSP 53° to the IR   • Shoulders: in same horizontal plane	CR Entrance & Angle:   • _|_ 1"" superior & posterior to upside TEA   • Collimation:   • Best to Determine:   • Ethmoid, sphenoid, frontal sinuses, Superior & inferior margins, Lateral & medial walls, & lesser wing of sphenoid	Eval Criteria:   • Optic foramina is projected into inferior & lateral quadrant of projected orbit (R optic foramen is in lower left quad...)   • If optic foramina is longitudinally incorrect-AML not correct)   • If optic foramina is laterally incorrect-rotation not correct)