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SOMI Chapter 11

Mandible, Zygomatic Arches, TMJs

QuestionAnswer
How much head rotation on the axiolateral oblique is required to best demonstrate the mentum? 45 degree rotation
How many degrees must the head tilt and central ray angulation combine to make in the axiolateral oblique mandible? 25 degrees combined
What degree of rotation is required for a general survey of the mandible in the axiolateral oblique? 10-15 degrees
Which side are you looking at in the axiolateral oblique projection of the mandible? the side closest to the IR
Which positioning line do you need perpendicular to the IR for a PA mandible? OML
Where is the CR centered for the PA mandible? to exit at the junction of the lips
For an AP Axial (Towne) method of the mandible what is the caudal angle range? 35 degrees if OML perpendicular to IR and 42 degrees if IOML is perpendicular to IR
Where does the CR enter for the AP Axial (Towne) for the mandible? 1" superior to the glabella
Which positioning line is perpendicular in the PA (modified waters) projection for the mandible? LML
Where does the CR exit in the mandible's PA (modified waters) projection? acanthion
What positioning line is parallel to the IR for the SMV (full basal) projection of the mandible? IOML
Where do you center the CR for the SMV (full basal) of the mandible? midway between angles of mandible or at a level 1 and 1/2 inches below the mandibular symphysis
What is the kVp range for the SMV (full basal) projection of the Zygomatic Arches? 70 to 80 kVp
What positioning line is perpendicular to the IR in the parietoacanthial (Waters) projection of the Zygomatic Arches? MML
For an AP axial (modified Towne) method of the Zygomatic Arches what is the caudal angle range? 30 degrees if OML perpendicular to IR and 37 degrees if IOML perpendicular to IR
Where is the CR directed for the AP axial (modified Towne) projection for Zygomatic Arches? center 1 inch superior to the nasion to exit at the level of the gonion
What positioning line is parallel to the IR for the oblique inferosuperior (tangential) projection of the Zygomatic Arches? IOML
How is the head positioned for the oblique inferosuperior (tangential) projection Zygomatic Arches? rotate head 15 degrees toward side to be examined; also tilt chin 15 degrees toward side of interest
From the true lateral position how much and which way is the face rotated for the axiolateral oblique (modified Law)? rotate face toward the IR 15 degrees
Which way and how much is the CR angled for the axiolateral oblique (modified Law)? 15 degree caudad
Where is the CR directed for the axiolateral oblique (modified Law)? 1.5 inches superior to the upside EAM
In the axiolateral (modified Schuller) projection the head is in a true lateral position, what positioning line is perpendicular to the IR? IPL
What angle and direction is the CR for the axiolateral (modified Schuller) projection? 25 to 30 degree caudad
Where is the CR directed for the axiolateral (modified Schuller) projection? 1/2 inch anterior and 2 inches superior to upside EAM
Where is CR directed for the AP axial (modified Towne) of the TMJs? 3 inches superior to the nasion
Created by: xraydude