test 4 skull positioning Flashcards
(53 cards)
PA SKULL: OML is ______ to IR.
Perpendicular
How can you tell this is a PA skull?
Petrous ridges fill orbits
PA SKULL: MSP is _______ to IR
Perpendicular
In a PA skull what is touching the IR
Forehead and nose
Where does the cr enter or exit on a PA skull?
Exits nasion
Do you angle on a PA skull?
No angle
What structures do you see on the PA skull?
⚫️petrous ridges fill orbits
⚫️cristi galli
⚫️frontal bone
⚫️frontal sinuses
How can you tell this is a PA axial skull?
Petrous ridges in lower third of orbits
In a PA axial skull: OML is ______ to IR
Perpendicular
In PA axial skull: MSP is _______ to IR
Perpendicular
In a PA axial skull what is touching the IR?
Forehead and nose
In a PA axial skull where the CR enter or exit?
Exits nasion
Do you angle the CR on a PA axial skull, how much and what direction?
15 degree caudal
What structures do you see on a PA axial skull?
⚫️petrous ridges in bottom 1/3 of orbits
⚫️cristi galli
⚫️frontal bone
⚫️frontal sinuses
AP AXIAL SKULL(Townes method) : OML IS _____ To IR.
Or
IOML is ______ to IR
Perpendicular
Perpendicular
AP AXIAL SKULL (TOWNES METHOD): MSP is ________ to IR.
Perpendicular
on an AP Axial Skull (Townes) what is touching the IR?
Back of head
On an AP Axial skull/Townes where do you put the top of the IR?
Skull vertex
On an AP Axial Skull/Townes where does the CR enter or exit?
Enters 2 1/2 inches above glabella aka the hairline of normal pt
On an AP axial skull/Townes if using OML then CR angle will be
30 degree caudal
On an AP Axial Skull/Townes if using an IOML then CR angle will be
37 caudal
In a AP axial skull/Townes what structures do you see?
⚫️symmetrical petrous ridges ⚫️posterior portion if foramen magnum ⚫️dorsum sellae and posterior clinoid process projected within the foramen magnum ⚫️occipital bone ⚫️posterior portion of parietal bones
For a trauma AP axial Townes what will the angle be? Direction?
40-60 caudal
On a SMV (Submentovertical) Schuller Method: IOML ______ with IR
Parallel
