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Positioning: Skull

Facial, Cranium & Sella Turcica

QuestionAnswer
Where does the CR exit for a PA axial projection of the mandible? Acanthion
Which positioning line is parallel to the image receptor for the oblique inferosuperior (tangential) projection of the zygomatic arches? IOML (infraorbitomeatal line)
Which projection will best demonstrate the entire mandible with one exposure? SMV (submentovertex)
Terms describes the junction of the two nasal bones? Nasion
Where is the CR centered for a lateral projection of the facial bones? Zygomatic bone
Which positioning line is placed perpendicular to the plane of the image receptor with a true lateral nasal bone projection? IPL (interpupillary line)
Where is the CR centered for an AP axial projection for the mandible? Glabella
What is the maximum CR angulation used for the axiolateral oblique projection of the mandible? 25 deg.
Which positioning line is placed perpendicular to the image receptor for the parieto-orbital oblique projection of the optic foramina? AML (acanthiomeatal line)
What is the angle between the midsagittal plane and the image receptor for a parieto-orbital oblique projection of the optic foramen? 53 deg.
Which positioning line must be used with a 30 caudad angle for an AP axial projection of zygomatic arches? OML (orbitomeatal line)
What projection best demonstrates the floor of the orbits? Modified waters
The CR must be placed parallel to the positioning line for the superoinferior (tangential) projection of nasal bones. GAL (glabelloalveolar line)
What projections will best demonstrate the bony nasal septum? Parietoacanthial
Three cranial bones articulate directly with the zygomatic bone? Frontal, temporal, sphenoid
The point of union between both halves of the mandible is termed: Symphysis menti
What projections for the sella turcica best visualizes the anterior clinoid processes? AP Axial 30 deg. caudal to IOML
Where is the CR centered for a lateral projection of the cranium? 2" above EAM
What is the difference, in degrees, between the infraorbitomeatal and orbitomeatal lines? 7 deg.
Term describes the small flap of cartilage covering the opening to the ear? Tragus
What landmark corresponds with the level of the petrous ridge? TEA (top of ear attachment)
The slight depression above each eyebrow is termed the: SOG (supraorbital groove)
How many cranial bones are there: 8
How many facial bones are there: 14
Cranial sutures Coronal, lambdoid, sagittal, squamous
Junction points Bregma, lambda, asterion, pterion
Which cranial bone is best demonstrated with an AP Axial (Towne method) projection of the skull? Occipital bone
What CR angle should be used for the PA Axial (Haas method)? 25 deg. cephalad
Where is the CR centered for a lateral skull? 2" above EAM
Which projection of the skull produces an image of the frontal bone with little to no distortion? PA Skull
What line is parallel to the IR for the SMV? IOML (infraorbitomeatal line)
What position best demonstrates the sella turcica in profile? Lateral
What position best demonstrates the clivus in profile? Lateral
Where does the CR exit for a Haas method of the skull? 1.5" above nasion
For a PA waters, the petrous ridges should be projected directly below the: Maxillary sinuses
For a Modified waters, the petrous ridges should be projected below the: Orbital rims
Which sinuses are best demonstrated with a PA Caldwell projection? Frontal and anterior ethmoid sinuses
Which group of sinuses is best demonstrated with a waters position? Maxillary sinuses
Which sinuses are projected through the oral cavity with the PA axial transoral projection? Sphenoid
Other term for SMV: Schuller method
Created by: bluuberizz
 

 



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