P
Proper positioning for a PA projection of the skull is determined by _______?
1. symmetry of the skull
2. petrous ridges filling the orbits (perpendicular angle causes ridges to fill orbits)
CR directed perpendicular to the Zygoma (midway between the outer canthus and EAM)
What anatomy is involved in a blow-out fracture of the orbits?
1. orbital floor
2. inferior rectus muscle
3. medial wall of ethmoid bone
4. orbital fat&tissue
5. infraorbital nerve
For the Axiolateral Oblique projection of the Mandible, to demonstrate the Ramus, the patient head is ________?
in true lateral position
A Lateral Nasal Bones Projection is typically performed _______?
on the table top
What is another name for the Submentovertex projection of the skull?
SMV (full basal)
For a Parietoacanthial (waters) projection of the facial bones, the MSP and MML are positioned _______ to the IR, and the neck is hyperextended so the OML forms a ______ angle with the IR?
1. MSP and MML perpendicular to IR
2. OML forms a 37-degree angle with the IR.
the PA Modified Parietoacanthial (modified waters) projection of the facial bones, BEST DEMONSRATES ________?
the orbits, and possible blow-out fracture.
For the Axiolateral Oblique projection of the Mandible, to demonstrate the body, the patients head is _______?
rotated 30-degrees toward the IR
For a Lateral Projection of the Nasal Bones, the MSP is positioned ________ to the IR, and the IPL is positioned _______ to the IR?
1. MSP parallel to IR
2. IPL perpendicular to IR
For the Submentovertex (SMV) projection of the skull, the neck is hyperextended until the ___________?
the IOML is positioned parallel to the IR
what is the CR location for a Parietoacanthial (Waters) projection of the facial bones?
CR directed perpendicular to the IR and MSP exiting the acanthion.
Proper positioning for a PA Modified Parietoacanthial (modified waters) projection of the facial bones, is determined by ______?
1. symmetry of the skull
2. petrous ridges in the middle of maxillary sinus.
For the Axiolateral Oblique projection of the Mandible, to demonstrate the Mentum (Symphysis), the patients head is _______?
rotated 45-degrees toward the IR.
Where is the CR location for a Lateral Nasal Bones Projection?
CR perpendicular to the IR to a point 1/2 inches (1.25 cm) below the nasion
For the Submentovertex (SMV) projection of the skull, the CR is __________?
1. CR perpendicular to the IOML.
2. CR directed perpendicular through MSP, through the sella turcica
Proper positioning for a Parietoacanthial (waters) projection of the facial bones, is determined by ________?
1. symmetry of the skull
2. petrous ridges projected inferior to the maxillary sinuses.
If the technologist is needing to project the petrous ridges BELOW the maxillary sinuses, what adjustment should the technologist make?
Extend the chin more.
For an Axio-lateral Oblique (modified Law) projection of the TMJ's, how many radiographs are obtained?
open and closed mouth views are taken of both sides, for comparison.
How many Lateral Nasal Bones Projections are performed?
two, for comparison.
Facial bone views should be done Upright whenever possible to demonstrate ________?
Air/fluid levels.
For the PA Modified Parietoacanthial (modified waters) projection of the facial bones, the neck is hyperextended so the ____________ to the IR?
OML forms a 55-degree angle to the IR.
For the Axiolateral Oblique projection of the Mandible, the CR is Directed _______?
CR directed 25-degrees cephalad through the mandibular ramus closest to the IR.
The Parietoacanthial (waters) projection of the nasal bones, BEST DEMONSTRATES ______?
the bony nasal septum and roof of nasal cavity.
A Lateral Nasal Bones Projection will demonstrate _________?
the nasal bone closest to the IR, and the anterior nasal spine.