Positioning- Nasal Bones and Orbits Test

bilateral lateral

waters (parietoacanthial) method or modified waters method

what are the projections for nasal bones?

40"

what is the SID for all nasal projections?

no

do we use a grid for bilateral nasal bones?

MS plane

what should be parallel to the IR for bilateral nasal bones?

interpupillary line

what should be perpendicular to the IR for bilateral nasal bones?

IOML

what should be perpendicular to the edge of the IR for bilateral nasal bones?

bridge of the nose

where should the CR be directed for bilateral nasal bones?

anterior nasal spine of the maxilla

frontonasal suture (glabella)

what must be included on bilateral nasal bone images?

place chin against the IR

how to position patient for waters projection?

place nose and chin against the IR

how to position patient for modified waters projection?

MML

what should be perpendicular to the IR for waters projection of nasal bones?

37 degrees

what angle should the OML form with the IR for waters projection of nasal bones?

acanthion

where should the CR EXIT for waters projection of nasal bones?

any lateral dislocation or fracture of nasal bones

deviated septum

what would a waters projection of nasal bones show?

modified waters (parietoacanthial)

AP or PA Axial

Lateral

Rhese (parietoorbital) oblique

what are the projections for orbits?

40

what is the SID for all orbit projections?

OML forms a 55 degree angle with the IR for the modified waters method

what is the different between a regular waters method and a modified waters method?

level of the outer canthus

where should the CR be directed for the modified waters method for orbits?

MSP and IOML

what should be perpendicular for the AP or PA Axial projection for orbits?

30 degrees cephalic

how should the CR be angled for AP Axial projection for orbits?

30 degrees caudal

how should the CR be angled for PA Axial projection for orbits?

to the lips

where should the CR be directed for an AP or PA Axial projection for orbit?

2" superior to the inion

where will the CR EXIT for an AP or PA Axial projection for orbit?

blow outs

what would the AP or PA Axial projection for orbits show?

affected side

what side should be placed against the IR for a lateral orbit projection?

MSP

what should be parallel to the IR for a lateral orbit projection?

IPL

what should be perpendicular to the IR for a lateral orbit projection?

iOML

what should be perpendicular to the edge of the IR for a lateral orbit projection?

outer canthus

where should the CR be directed for a lateral orbit projection?

to see foreign bodies

what is the purpose of doing lateral orbit projection?

place affected nose, cheek and chin against the IR

how to position the patient for the rhese (parietoorbital) oblique projection?

AML

what should be perpendicular or the rhese (parietoorbital) oblique projection?

53 degrees

what angle should the MSP form with the IR or the rhese (parietoorbital) oblique projection?

1" superior and 1" posterior to the TEA on the side up

where should the CR be directed or the rhese (parietoorbital) oblique projection?

optic foramen of affected side

what should be seen on a rhese (parietoorbital) oblique projection?