Question

Using the PA projection, which of the following tube angle and direction combinations is correct for an axial projection of the clavicle?

A) 10 degrees cephalad
B) 10 degrees caudad
C) 15 degrees cephalad
D) 15 degrees caudad

Answer 1

For an axial projection of the clavicle using the PA projection, the correct angle and direction of the x-ray tube is 15 degrees cephalad to provide a clear image.

Step-by-step explanation:

The correct tube angle and direction combination for an axial projection of the clavicle using the PA projection is 15 degrees cephalad. When performing this type of radiographic projection, the central ray of the x-ray tube is angled at 15 degrees in a cephalad direction, which means it is directed upward toward the head from the posterior-anterior (PA) position. This angle helps to project the clavicle above the ribs and scapula on the radiographic image, providing a clearer view for diagnostic purposes.