![]() This allows for discrepancies in the tilt of the head (flexion/extension of the cervical spine). To achieve the best angle, the central ray should be directed at an angle that parallels the plane of the mandible and then directed to just below the hyoid bone. An excessive or insufficient angle can distort these disc spaces. To project the intervertebral disc spaces open, the central ray should be directed perpendicular to the long axis of the vertebral column 3, 4. This angle can and will vary between 5-20° depending on the position of the head. For this reason, a cephalic angle is required to project through the long axis of the vertebral column. Correcting tube angle errors and head tilt errorsĪ lordotic curvature exists in the cervical spine. The spinous process will rotate toward the pedicle of the side farther from the image receptor 3. A decision to pursue C-spine imaging of any kind should be cross-referenced with the 'Canadian C-Spine Rule' for C-spine imaging due to its high sensitivity and specificity 4. The spinous process should be midline of the vertebral body, equidistant from both pedicles 3. Any deviation from the midline indicates rotation is present. Cervical spine radiographs are indicated for a variety of settings including 1-3: trauma. Rotation can be detected by looking at the spinous processes in relation to the pedicles.
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