Where will the petrous pyramids be projected in a properly positioned PA axial (Caldwell) projection radiograph?

The correct answer is option C. "In the lower 1/3 of the orbits".

Explanation:

The missing options of this question are

A. In the center of the orbits

B. In the upper 1/3 of the orbits

C. In the lower 1/3 of the orbits

D. In the lower 1/8 of the orbits

The correct answer is option C. "In the lower 1/3 of the orbits".

The petrous pyramids is a part of the temporal bone that separates the middle and posterior cranial fossae. In a properly positioned PA axial (Caldwell) projection radiograph, the petrous pyramids will be located in the lower 1/3 of the orbits. The PA axial (Caldwell) projection is used to see the frontal bones of the cranial fossae, which will let the petrous pyramids positioned in the lower 1/3 of the orbits.