Chapter 11 - Facial Bones/Orbits/Nasal Bones Positioning Flashcards
Protocol for facial bones
Lateral (affected side)
Caldwell 15
Waters
SMV
Possible teacup
Protocol for orbits
Lateral (affected side)
2 Rhese views
Caldwell 30
Waters
Protocol for nasal bones
L&R Lateral
Waters
What are the entry and exit points for the Waters position
Enter parietal bone, exit acanthion
What is perp to the IR in a Waters position
MML
What is parallel to the IR in a SMV position
IOML
In trauma, what position is used instead of SMV
Modified Townes
What is touching the IR in a rhese position
Chin, cheek and nose
What is perp to the IR in a lateral position
IPL
Where should the optic foramen be in the Rhese method
Lower outer quadrant
What facial bone structures are best seen with a Waters projection
Inferior orbits
Nasal septum
Maxillae
Zygos
Arches
What structures are better visualized in a modified Waters projection
Orbits (rims and floors)
What line is perp to the IR in the Waters method
MML
What angle is the OML to the IR when MML is perp to the IR
37 degrees
What line is perp to the IR in a Modified Waters projection
LML
What angle is the OML to the IR when LML is perp to the IR
55 degrees
What line is perp to the IR for the superoinferior projection of the nasal bones
GAL
What is the CR centered for the AP axial of the zygomatic arches
1” superior to nasion
What is the angle between the midsagittal plane and the IR in the Rhese projection
53 degrees
What line is perp to the IR in the Rhese projection
AML
What projection should be used for a blowout fracture
Modified waters
