A radiograph of a PA projection of the sinuses reveals that the petrous ridges are projected over the ethmoid sinuses.Which of the following modifications will eliminate this superimposition while not compromising diagnostic quality of the study?
A) Increase extension of the head and neck slightly.
B) Angle the CR 5° to 10° caudad.
C) Increase flexion of the head and neck slightly.
D) Have the patient open his mouth.
Correct Answer:
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