Facial Bones Positioning Flashcards
Whats another name for the PA axial view facial bones?
Caldwell method
Whats another name for the caldwell method facial bones?
PA axial
What structures are seen in a PA axial facial bones (Caldwell method)?
- Orbits are equal distance from the skull borders
- Symmetric petrous ridges lying in the lower /3 of the orbit
- Exaggerated Caldwell= Petrous ridges projected below the inferior margins of orbits
How is the patient positioned for a PA axial facial bones (Caldwell method)?
- Patient is prone or upright (upright is best)
- Forehead and nose rest against the table/bucky
What do you need to check for accuracy for a PA axial facial bones (Caldwell method)?
Baselines
Where is the MSP & OML in a PA axial facial bones (Caldwell method)?
Perpendicular to IR
Where is the CR for a PA axial facial bones (Caldwell method)?
Exits at the nasion
What angle is the CR for a PA axial facial bones (Caldwell method)?
15 degrees caudal
What does the exaggereated caldwell method show?
- Shows the orbital rims
- Petrous ridges are projected below the inferior margins of the orbits
What view shows the orbital rims for facial bones w/ the petrous ridges projected below the inferior margins of the orbits?
Exaggerated caldwell
What angle is the CR for an exaggerated caldwell for facial bones?
30 degrees caudal
What are the structures seen for a parietoacanthial facial bones views (waters method)?
- Distance between the lateral border of the skull and orbit equal on each side
- Petrous ridges below maxillary sinuses
- Demonstrates the maxillae, orbits, and zygomatic arches
- Modified Waters= Petrous ridges projected immediately below the inferior border of the orbits
How is the patient positioned for a parietoacanthial facial bones views (waters method)?
- Patient is prone or PA upright (upright is best)
- Chin on bucky/table
- Nose 3/4” from bucky/table
Where is the CR for a parietoacanthial facial bones views (waters method)?
Exits the acanthion
Where is the OML for a parietoacanthial facial bones views (waters method)?
37 degrees with plane of IR
Where is the MML & MSP for a parietoacanthial facial bones views (waters method)?
Perpendicular to the plane of IR
What does modified waters of the facial bones do the OML?
Places OML 55 degrees with the plane of IR
What structures are seen for a left lateral facial bones view?
- All facial bones in their entirety, with the zygomatic bone in the center
- Almost perfectly superimposed mandibular rami
- Superimposed orbital roofs
- No rotation of sella turcica
Where is the CR for a left lateral facial bones view?
Enters lateral surface of the zygomatic bone halfway between the outer canthus and EAM
How is the patient positioned for a left lateral facial bones view?
- Patient is prone or upright (upright is best) in LAO
- Head in true lateral position
Where is the MSP for a left lateral facial bones view?
Parallel to IR
Where is the IP line for a left lateral facial bones view?
Perpendicular to IR
Where is the IOML for a left lateral facial bones view?
Perpendicular to front edge of IR
Whats another name for the parietoacanthial view of the facial bones?
Waters method
Whats another name for the facial bones waters method?
Pareitoacanthial view
What breathing technique is used for a PA axial facial bones (Caldwell method)?
Suspended respiration
What IR is used for a PA axial facial bones (Caldwell method)?
10x12 portrait
What IR is used for a parietoacanthial facial bones views (waters method)?
10x12 portrait
What breathing technique is used for a parietoacanthial facial bones views (waters method)?
Suspended respiration
What do you see for a modified water view parietoacanthial facial bones?
- OML place 55-degree with plane of IR
- Petrous ridges projected immediately below the inferior border of the orbits
What breathing technique is used for a left lateral facial bones view?
Suspended respiration
What IR is used for a left lateral facial bones view?
10x12 portrait
In which view of the facial bones do you see an OML place 55-degree away from plane of IR and the petrous ridges projected immediately below the inferior border of the orbits?
Modified water view of the parietoacanthial view
