Question

How much and in which direction is the CR angled for an AP axial oblique projection of the cervical spine?

a) 15 degrees caudad
b) 15 degrees cephalad
c) 45 degrees caudad
d) 45 degrees cephalad

Answer 1

For an AP axial oblique projection of the cervical spine, the central ray is angled at 15 degrees cephalad for optimal visualization.

Step-by-step explanation:

For an AP axial oblique projection of the cervical spine, the central ray (CR) is angled at approximately 15 degrees cephalad. This projection is commonly known as the "Fuchs" method. The specific angle helps to visualize the intervertebral foramina open and superimpose the vertebral bodies. The direction of angulation, cephalad in this case, aligns with the anatomical structure to allow better visualization of the neural foramina.

This angulation aids in separating the intervertebral foramina by projecting them away from the superimposed structures, thereby reducing their overlap. It's crucial for imaging the neural arch structures and their openings. This technique provides a clearer view of the cervical vertebrae, enabling a more accurate assessment of potential pathology or injuries in this region of the spine.