An AP axial cranium projection (Towne method) demonstrating the dorsum sellae superimposing the atlas's posterior arch
A) was obtained with the patient's face rotated toward the right side.
B) will require the central ray angle to be adjusted caudally until it forms a 30-degree angle with the OML.
C) will require the patient's chin to be elevated to obtain an optimal projection.
D) will also demonstrate elongation of the dorsum sellae.

Question

Quizplus · Accepted Answer

The central ray angle should be adjusted to form a 30-degree angle with the orbitomeatal line (OML) to correct the superimposition of the dorsum sellae on the atlas's posterior arch.

An AP Axial Cranium Projection (Towne Method) Demonstrating the Dorsum