These protocols are based on a 128 slice dual source Siemens CT. Some factors may need to be adjusted for a different CT.
CT - Rotational Profile
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|Indication||Discrepancy in Leg lengths and rotation of limbs|
|Patient Position||- feet first
- legs evenly positioned and internally rotated
- toes touching
Immobilise with cushions and straps when necessary.
Scanogram use separate accession number position as above.
|Scan Area||Rotational Profile:
1- Hips- From acetabular roof to the lesser trochanter.
2- Distal Femur - Proximal Tibia
4- Distal Tibia
See diagram below for required images.
Iliac crests to distal surface of the Os Calsis using gonad shielding.
| kV/Quality Ref
Time per Rotation
Care kV off
Care dose 4D on
|Reconstructions||3mm and 0.75mm B31f Pelvis
3mm and 0.75mm B70s Bone
10mm B70s Bone
|Post Processing||3mm Coronal B70 Bone Bilateral Hips, Knees and Ankles|
Occasionally a series of sequential scans can be used to obtain
the required imaging. Use the diagram below as a guide to
1. Hips - Acetabular roof to the lesser Trochanter
2. Distal Femur
3. Proximal Tibia
4. Distal Tibia
Did you find this information helpful?
- Date last published: 12 December 2017
- Document type: Imaging Protocol
- Services responsible: Paediatric Radiology
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