Which of the following pertains to an AP axial (Towne method) cranial projection obtained with the patient's face rotated toward the left side?
A) The dorsum sellae is demonstrated superior to the foramen magnum.
B) The atlas's posterior arch is demonstrated within the foramen magnum.
C) The distance from the dorsum sellae to the lateral foramen magnum on the patient's left side is narrower than on the right side.
D) The distance from the dorsum sellae to the lateral foramen magnum on the patient's right side is narrower than on the left side.

Question

Quizplus · Accepted Answer

When the patient's face is rotated to the left for an AP axial (Towne method) cranial projection, the left side of the skull is situated nearer to the image receptor, while the right side is farther away. This can cause foreshortening of the right side and elongation of the left side of the foramen magnum. Thus, the distance from the dorsum sellae to the lateral foramen magnum on the patient's left side appears narrower than on the right side.

Which of the Following Pertains to an AP Axial (Towne