Which projection describes the path of the central ray along the long axis of the body part?

• A. Axial
• B. Axillary
• C. Cephalic
• D. Caudal

Answer: (A)

Axial projection describes the central ray traveling along the long axis of the body part. This orientation lines up the beam with the length of the structure, which helps image features that run lengthwise, like the spine or a long bone shaft. Cephalic and caudal refer to directions toward the head or toward the tail, not to the CR path along the axis. Axillary relates to the armpit region and is about the body area being imaged rather than the beam’s path along the long axis. So the projection that describes the path of the central ray along the long axis is axial.