Finding-the-Path: Second radiograph of cervical spine

A second radiograph of the cervical spine shows marked prevertebral soft tissue swelling in the lower cervical region (arrow).

Which study do you request next?

• Tomography of the cervical spine
• CT of the cervical spine
• A third radiograph of the cervical spine
• Combined bone (Tc-99m-MDP) and gallium (Ga-67) scintigraphy