CAMRT Radiography Practice Exam

Which indicator signifies over rotation of an oblique L-spine?

1. Pedicle anterior

2. Pedicle posterior

3. Inferior articulating process

4. Lamina

The correct answer is: Pedicle posterior

The correct choice signifies over-rotation of an oblique lumbar spine image and is indicated by the position of the pedicle. When there is over-rotation, the pedicle on the side being examined appears posterior to the vertebral body instead of being aligned with it. This misalignment demonstrates that the patient was rotated too far during the imaging process. In a properly positioned oblique view of the lumbar spine, the pedicle should be seen in profile, appearing at an even distance from the midline of the vertebral body. If the pedicle shifts posteriorly, this indicates excessive rotation away from the true lateral position. Other options represent different structures that do not directly indicate over-rotation. For example, the position of the inferior articulating process or lamina does not specifically reveal the degree of rotation in the same way that the alignment of the pedicle does. Thus, evaluating the position of the pedicle is a critical factor in determining the accuracy of the rotational alignment during imaging.