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Table 1 Example technical factor settings for spinal CT. There is large variability in the literature and authoritative suggestions are not possible. For obese patients the mA (and possibly kV) has to be increased, often to the maximal setting. For targeted limited examinations of the lumbar and thoracic spine the cervical presents can be used

From: Technical aspects of CT imaging of the spine

  kV mAs Detector collimation [mm] Pitch Reconstructed slice thickness [mm]
Single-slice CT
Cervical spine 120 240 3 1-1.5 3
Thoracic & lumbar spine 140 280 (3-)5 1-1.5 3
Four-slice CT
Cervical spine 140 200 1 1 1.25-2
Thoracic & lumbar spine 140 300 1-2.5 1-1.5 1.25-2
16-slice CT
Cervical spine 120 330 0.75 0.5 1
Thoracic & lumbar spine 120 380 0.75–1.5 0.5 1–1.5
64-slice CT
Cervical spine 120 330 0.6 0.9 1
Thoracic & lumbar spine 120 380 0.6–1.25 0.9 1–1.5