Skull Positioning Flashcards
Where will the petrous ridges be projected on a properly positioned PA Axial (Caldwell)?
lower 1/3 of the orbits
What is demonstrated through the shadow of the foramen magnum on a Towne position?
dorsum sella
What two parts of the patient’s anatomy (skull) would be touching the table for a PA Caldwell?
nose and forehead
For the SMV projection, which of the following should be parallel to the plane of the film?
infraorbitomeatal line
The orbitomeatal line is perpendicular to the film, the CR is angled 15 degrees caudal. What projection/position is this?
PA Caldwell
Which of the following would best demonstrate the frontal bone?
caldwell
Which of the following would best demonstrate the occipital bone?
Towne
On which cranial bone is the sella turcica located?
sphenoid
Which of the following is best demonstrated on an SMV skull?
base of cranium
What is the posterior portion of the sella turcica called?
dorsum sella
____ perpendicular to IR for Towne position.
OML
Tube angle for Towne (OML perpendicular to IR)
30 caudal
Tube angle for Towne (IOML perpendicular to IR)
37 caudal
CR centering for Towne
2.5 inches above glabella at MSP
For Towne, underangulation of CR or insufficient flexion of neck projects the _____ superior to the foramen magnum.
dorsum sellae
This position may demonstrate air-fluid levels in the sphenoid sinus
Lateral skull
_____ perpendicular to IR for lateral skull
IPL
Adjust neck flexion to align ____ perpendicular to front edge of IR for lateral skull
IOML
CR centering for lateral skull
2 inches superior to EAM
Demonstrated in profile for lateral skull
Sella turcica and clivus
____ perpendicular to IR for Caldwell
OML
CR centered to exit at the ___ for Caldwell
Nasion
For Caldwell, if the distance between the right lateral orbit and lateral cranial cortex is greater than the left side, the face is rotated toward the:
Left side
____ perpendicular to IR for PA skull
OML
CR centered to exit at ___ for PA skull
glabella
____ parallel to IR for SMV
IOML
