Procedures 3: Orbits and Nasal Bones

what is auroras routine for orbits

• 30 degree Caldwell

• Waters

• Affected side lateral

patient positioning for the Caldwell view of the orbits

• erect or prone

• nose, forehead against IR

• OML perp and MSP perp

CR for Caldwell orbits

30 degrees caudal exiting at nasion

what should be demonstrated on a caldwell orbit image

• petrous ridges in lower 1/3 to below orbital margin

• superior orbital fissures

• fractures, foreign bodies

positioning for the waters view of the orbits

• erect or prone with head resting on extended chin

• MML perp to IR and OML forms a 37 degree angle to IR

CR for the waters view for orbits

perp to IR exiting at the acanthion

what should be demonstrates on the waters view for the orbits

• petrous ridges below maxillary sinuses

• entire orbits floor distorted and maxillary sinuses

• fractures, foreign bodies

positioning for a lateral view of the orbits

• erect, supine, prone

• affected side against IR, MSP parallel, IP perp

CR for lateral orbits

perp to IR entering at outer canthus of orbit

what should be demonstrated on lateral view of orbits

• lateral view of bony orbit and soft tissue

• fractures, foreign bodies

what are pre-MRI orbits

done if someone has a history of working with metal or having metal in eye

what is auroras routine for pre-MRI orbits

waters and lateral

the optic foramen lies ______ with MSP and _______ with OML

37 degrees, 30 degrees

positioning for orbits parieto-orbital view (Rhese)

• erect or prone

• rest head on cheek, chin, and nose

• MSP 53 degrees with IR and AML is perp

what happens if AML is overextended for Rhese view

canal will be too low

what happens if AML is underextended for Rhese view

canal will be too high

CR for Rhese view

perp to IR entering 1 inch superior and 1 inch posterior to upside TEA

what should be demonstrated on the Rhese view of the orbits

• cross-sectional view of optic canal lying in the lower outer quadrant of downside orbit

• done with both sides

what is auroras routine for nasal bones

• PA

• Waters

• Lateral

positioning for PA nasal bones

• erect or prone

• nose and forehead on IR

• OML perpendicular to IR and MSP perp

CR for PA nasal bones

perp to IR exiting at nasion

what should be demonstrated on PA nasal bones

• petrous ridges filling the orbits

• frontal bone, crista galli, nasal bone, nasal septum, posterior ethmoid, frontal sinus

• fractures

positioning for the waters view of nasal bones

• erect or prone

• head resting on chin with MML perp to IR

• OML forms 37 degrees to IR

CR for waters view of nasal bones

perpendicular to IR exiting at acanthion

what should be demonstrated on a waters view of nasal bones

• petrous ridges below maxillary sinuses

• orbits, zygomas, maxillary sinuses

• best view for deviated septum

• fractures

positioning for lateral nasal bones

• erect,semiprone position

• MSP parallel to IR

• IP line perp to IR

CR for lateral nasal bones

perp to IR entering ½ inch inferior to nasion

what should be demonstrated on lateral nasal bones

• lateral view of nasal bones, soft tissue, fractures

• done on both sides for comparison