Where should the CR be centered for AP cervical spine and what should be included in the collimation?

Where should the CR be centered for AP cervical spine and what should be included in the collimation?

• A. Centered at C4; include skull base through upper thoracic inlet and both atlantoaxial joints
• B. Centered at C3; include entire head
• C. Centered at C6; include from skull base to T1
• D. Centered at C1; include from occipital bone to C7

Answer: (A)