A patient is unable to elevate the chin enough for a parietoacanthial facial bone projection (Waters method) . How could the positioning setup be adjusted for an optimal projection to be obtained?
A) Angle the central ray cephalically.
B) The projection cannot be obtained.
C) Align the central ray parallel with the MML.
D) Elevate the patient's chin as far as possible and use a perpendicular central ray.
Correct Answer:
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