Question

An axial projection of the clavicle is often helpful in demonstrating a fracture not visualized using a perpendicular central ray. When examining the clavical in the AP axial projection, how should the central ray be directed?

a. Cephalad
b. Caudad
c. Medially
d. Laterally

Answer 1

For an AP axial projection of the clavicle, the central ray should be directed cephalad, which helps in visualizing fractures not seen with a perpendicular central ray.

Step-by-step explanation:

When examining the clavicle in the AP axial projection, the central ray should be directed cephalad. In radiography, 'cephalad' refers to angling the central ray in the direction of the patient's head. This technique is often helpful in demonstrating a fracture of the clavicle that is not visible when using a perpendicular central ray, as it gives a different perspective and can help to separate the clavicle from overlying structures. The X-ray beam is angled towards the clavicle, allowing for better visualization of any fractures.