When positioning the SMV skull, the CR will intersect perpendicular with which positioning line?
OML
MML
MSP
IOML
IOML
Rationale: The CR should intersect the IOML perpendicular on the SMV. The head and neck are hyperextended until the IOML is parallel to the IR; thus the CR will intersect the IOML at a perpendicular angle.
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