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Skull Positioning


What is the routine for skull? Townes, Right Lateral, Left Lateral, PA(SMV @ POI & TLI)
In the Townes (AP Axial), the patient is placed ______ with the ______ perpendicular. Supine, IOML
The central ray is angled ____ degrees _____ in the Townes AP axial of the skull. 37; caudal
Where does the central ray enter in the Townes AP axial of the skull? Enters approx. 2-21/2" above the glabella
The CR exits the _____ _____ in the Townes skull. foramen magnum
What is being demonstrated in the Townes skull. Dorsum sellaeand posterior clinoid processes visible within foramen magnum, occipital bone, poserior portion of parietal bones
What view is being described:Patient prone, head rested on forehead and nose. OML and MSP perpendicular. CR perpendicular through nasion. PA
What line is also known as the radiographic baseline? OML - orbitomeatal line
OML is the abbreviation of _______ _____. orbitomeatal line
What is demonstrated in the PA skull. Frontal bone, petrous ridges filling the orbits, crista galli, ethmoid sinus, dorsum sellae
If the patient is unable to do PA skull, what can be done? AP skull
I the patient is unable to be placed in AP axial Townes, what can be done? PA Haas method
IOML infraorbitomeatal line
In this projection the mandibular rami, orbital roofs, mastoids, EAM, TMJ's are superimposed, Dorsum sellae is viewed, sella turcica seen in profile. Right/Left lateral
In the cross table lateral what is best demonstrated? sphenoid sinus effusion which is indicative of a basilar skull fracture
In the right/left lateral, the patient is prone, the MSP is ____, IOML is _____, and the IPL is ______. horizontal, parallel, perpendicular
The CR enters ______. Perpendicular to 2" superior to the EAM
How would your CR enter if the main purpose was to examine the sella turcica in the right/left lateral? CR enter 3/4" superior and 3/4" anterior to the EAM
EAM external auditory meatus
CR perpendicular to IOML through sella turcica3/4" anterior to EAM and entering between angles of mandible. What view is being described? SMV
SMV is also known as?? Schuller method or submentovertical projection
Describe the positioning for the SMV of skull. Patient supine or upright. Center MSP to film. Extend neck as far back as possible and rest head on vertex. MSP perpendicular. IOML parallel
What is demonstrated in the SMV skull. Superimposition of mandibular symphysis over anterior frontal bone, sphenoidal sinuses, cranial base, foramen ovale and spinosum
If the SMV is contraindicated by the patients condition, what should be done? VSM (verticosubmental projection)
Created by: sr4095