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These protocols are based on a 128 slice dual source Siemens CT. Some factors may need to be adjusted for a different CT.

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CT - Lower Extremities

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Notes:

For bilateral feet imaging, place grey cushion against headrest, rest feet gently on cushion securing feet with strap. Place a small plastic marker on right foot.

For longer scan range or an active child use Lower Extremity Fast (Child) or Lower Extremity Fast (Adult)

Indication For short scan range ie ankle, toes, feet etc
Patient Position - feet first
- supine
- region to be scanned should be secured in head rest if possible so region of interest is in the isocentre
Scan Area Above and below region of interest
kV /Eff mAs/
Time per Rotation
Care dose 4D on
Child 120
Adult 100
Child 70
Adult 100
1.0s
Detector Collimation 0.6mm
Slice Thickness 0.6mm  Pitch Child 0.8 (Adult 0.85)
IV Contrast Nil
Care Bolus Nil
Scan Delay Nil
Reconstructions 0.6mm U75u Baby Extremity (U75u Extremity Adult)
0.6mm U30u Pelvis 
Post Processing 1.5mm U75u Axial, Coronal and Sagittal MPR
1.5mm U30u Axial MPR
3D images as required 

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Document Control

  • Date last published: 09 January 2018
  • Document type: Imaging Protocol
  • Services responsible: Paediatric Radiology

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