cranium anatomy and positioning
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68 Terms
what part and projection is this?
lateral skull
what is A pointing to?
orbital roofs
what is B pointing to?
TMJ’s
what is C pointing to?
mandibular rami
what is D pointing to?
sella turcica
what is E pointing to?
external acoustic meatus (EAM)
what is F pointing to?
mastoid regions
where is the CR centered for a lateral skull?
2” superior to EAM
what is the collimation for a lateral skull?
11×9”
the IOML and the IPL are what to the IR in a lateral skull projection?
perpendicular
the MSP is what to the IR in a lateral skull projection?
parallel
what part and projection is this?
PA skull
what is A pointing to?
vertex
what is B pointing to?
superior orbital margin
what is C pointing to?
petrous ridge
what is D pointing to?
inferior orbital margin
what is E pointing to?
frontal bone
what is F pointing to?
frontal sinus
what is G pointing to?
dorsum sellae
what is H pointing to?
crista galli
what is I pointing to?
ethmoid sinus
where is the CR centered for a PA skull?
perpendicular and exiting the nasion
what is the collimation for a PA skull?
8×10”
the MSP and the OML are what to the IR in a PA skull?
perpendicular
the petrous ridges are seen where on a PA skull?
within the orbits
what part and projection is this?
PA axial skull (Caldwell method)
what is A pointing to?
superior orbital margin
what is B pointing to?
petrous ridge
what is C pointing to?
inferior orbital margin
what is D pointing to?
ethmoid sinus
where is the CR centered for a PA axial skull Caldwell method?
15 caudad- exiting at the nasion
what is the collimation for a PA axial skull Caldwell method?
8×11”
the MSP and the OML are what to the IR in a PA axial skull Caldwell method?
perpendicular
where are the petrous ridges seen on a PA axial skull Caldwell method?
lower one third of the orbits
what part and projection is this?
AP axial skull (Towne method)
what is A pointing to?
occipital bone
what is B pointing to?
petrous ridge
what is C pointing to?
posterior clinoid process
what is D pointing to?
parietal bone
what is E pointing to?
foramen magnum
what is F pointing to?
dorsum sellae
where the CR centered for an AP axial skull Towne method?
30 caudad to OML- 2.5” above the glabella
what is the collimation for an AP axial skull Towne method?
8.5×12”
if the patient is unable to lordotic bend to place their head truly AP- what CR angle and line can be used instead to compensate?
37 caudad to IOML
the MSP and OML or IOML are what to the IR during an AP axial skull Towne method?
perpendicular
what part and projection is this?
PA axial skull (Haas method)
what is A pointing to?
occipital bone
what is B pointing to?
foramen magnum
what is C pointing to?
petrous ridge
what is D pointing to?
posterior clinoid process
what is E pointing to?
dosum sellae
what is F pointing to?
sphenoidal sinus?
the CR is centered where for a PA axial skull Haas method?
1.5” inferior to the inion- exits 1.5” superior to nasion
the MSP and OML are what to the IR for a PA axial skull Haas method?
perpendicular
what part and projection is this?
SMV skull (Schüller method)
what is A pointing to?
nasal septum
what is B pointing to?
foramen ovale and spinosum
what is C pointing to?
petrous pyramid
what is D pointing to?
maastoid process
what is E pointing to?
ethmoid sinuses
what is F pointing to?
mandible
what is G pointing to?
sphenoid sinus
what is H pointing to?
foramen magnum
what is I pointing to?
occipital bone
the IOML is what to the IR for a SMV skull?
parallel
the MSP is what to the IR for a SMV skull?
perpendicular
where is the CR centered at for a SMV skull?
between the mandibular angles- ¾” anterior to EAM