facial bones, orbits, sinuses, nasal bones Flashcards
where is CP for lat facial bones
at zygoma, 1/2 between tip of the nose and EAM
why would you do lateral facial bones erect
air-fluid levels shown
easier for hypersthenic pts
what is the projection for a waters method
parietoacanthial
what should be perp to bucky up on a waters
MML perp to IR
on a waters, what angle should the OML be form the IR
37 degrees
what should facial waters collimation include
zygomatic arches
include orbits and mandible
what is the CR used for a facial caldwell
15 deg caudad
where should the petrous ridges be on a facial caldwell
in bottom 1/3 of orbits
what MUST happen if there is suspected foreign body in the orbits
wipe down bucky, grid, and IR
eyes must focus on one point, to hold still
what are the 3 types of orbital fractures
blowout
tripod
le forte
what is a blowout fracture
frontal pressure fractures the orbital floor
what is a tripod fracture
3 separate fractures, all around the zygoma
what is a le forte fracture
specific fracture patterns
3 tyoes
which le forte is this
I
which le forte is this
II
which le forte is this
III
what are the 2 routine orbits views
modified caldwell (30)
OR modified waters (55)
and lateral IOML
where is the CP of a lateral orbit
outer canthus of remote eye
for orbits, which side goes against the IR
the affected side
what is the CR for an orbits modified Caldwell
30 deg caudad
where are the petrous ridges on an orbits modified caldwell
below the orbital margins
what CR is used for the shallow waters
OML 50-55 dge from bucky
where is the CP for a shallow waters
outer canthus of orbits
where are the petrous ridges on a shallow waters
in lower 1/3 of maxillary sinuses
