An AP cranial projection with poor positioning demonstrates the petrous ridges inferior to the supraorbital margins. How could the positioning setup be adjusted for an optimal projection to be obtained?
1)Rotate the patient's face toward the left side.
2)Angle the central ray caudally.
3)Position the OML perpendicular to the IR.
4)Tuck the patient's chin more.
A) 1 only
B) 2 and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only

Question

Quizplus · Accepted Answer

The petrous ridges should be superior to the supraorbital margins. To achieve this, the central ray should be angled caudally, the OML should be perpendicular to the IR, and the patient's chin should be tucked more.

An AP Cranial Projection with Poor Positioning Demonstrates the Petrous