Anatomy
Where is the widest portion of the skull?
Parietal Tubercles (Eminences)
7 to 8 degrees.
May appear as jagged or irregular lucent lines that lie at right angles to the axis of the bone.
Linear Fractures
A PT has a possible FX of the proximal ramus of the mandible. Which Axiolateral view would best demonstrate this?
No rotation
Which junction corresponds to the Anterior Fontanel?
Bregma
Which cranial bone possesses the Sella Turcica?
Sphenoid
What is the full name for the positioning line between the earhole and just below the eye socket?
Infraorbitomeatal Line
Which bone is involved with a tripod fracture?
DAILY DOUBLE
Zygomatic.
PA Caldwell for the Cranium reveals the petrous ridges are projected into the lower 1/3 of the orbits. Which modification should be made to produce a more ideal image?
Nothing
Which cranium bone articulates will all other cranium bones?
Sphenoid
How many total bones make up the skull?
22 bones
The axiolateral oblique (Law Method) requires _____ rotation of the skull and ____ caudal angle of the CR.
15
15
Bone destruction with widened internal auditory canal.
Acoustic neuroma
What is the positioning error (if any): PA Waters projection reveals that the petrous ridges are superimposed over the lower 30% of the maxillary sinuses.
Insufficient extension of the skull and neck or an unneeded cephalic CR angle.
37
The upper and lower teeth are embedded in the ____ processes.
DAILY DOUBLE
Alveolar
Which projection best demonstrates the floor of the orbits with minimal distortion?
Modified Parietoacanthial (Modified Waters)
Which modality best demonstrates early sings of Paget's disease of the skull?
Nuc Med.
Which projection will best demonstrate a Blow-out fracture?
Modified PA Waters
Which skull shape has an angle between the MSP and Petrous Ridges of less than 47?
Dolichocephalic
How many FACIAL BONES help make up the bony orbit?
Four
Which positioning line is placed perpendicular to the IR for the parieto-orbital (Rhese method) projection of the optic foramina?
AML (acanthomeatal line)
May appear as an enlarged or eroded Sella Turcica.
Pituitary Adenoma
Which Routine would best demonstrate a fracture of the right Zygomatic Arch? (need 3 views)
1. SMV
2. Oblique inferosuperior (tangential)
3. AP Axial Towne
What does Dorsum Sellae translate to?
Back of the Saddle