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Spine
Hints in General
• Topogram: Lateral, 512 mm.
• Patient positioning:
Patient lying in supine position, arms positioned
comfortably above the head in the head-arm rest,
lower legs supported.
Any possible injuries to the spinal column should be
determined before beginning the examination and
taken into account when repositioning the patient.
• In case of SSD study only, mAs value can be reduced
by 50%. Use kernel B10 and 50% overlapping image
reconstruction.
• For cervical spine study, use the protocols in the
region “Neck“.
• For lumbar studies, place a cushion under the
patients knee. This will reduce the curve in the spine
and also make the patient more comfortable.
• For image reconstruction of bone study, use kernel
B60.
• The CT scan following myelography must be per-
formed within 4-6 hours of the injection, otherwise,
the contrast density in the spinal canal will be too
high to obtain artifact-free images. Also, if possible,
it is a good idea to roll the patient once, or scan in
a prone position. This will prevent the contrast from
pooling posterior to the spinal cord.
• For Spine examination we recommend at least 120
kV.
For obese patients
– use at least 120 kV and effective mAs 300
– for a 0.75 mm slice collimation choose 140 kV and
at least effective mAs 200.
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