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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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for small children remove the automated voice instruction that says 'do not breathe or swallow'

Indication - Lymphoma
- tumours
- abscesses
- ? stones
Patient Preparation 4 hours nil per mouth
Patient Position - head first
- supine
- hard palate perpendicular
Scan Area Start - EAM (external auditory meatus)
Finish - Carina
kV/Quality ref mAs/
Time per Rotation
Care dose 4D on
Care kV on
Child 100kV (Adult 120kV) 110 0.28
Detector Collimation 0.6
Slice Thickness Child 2mm (Adult 3mm) Pitch  0.6
IV Contrast  2mL/kg 300 concentration max 70mL @ 1.5mL/sec
Care Bolus If using hand bolus start scan as soon as injection is finished injecting last 10 mL as quickly as possible.
Scan Delay Manually put in delay of 40-50 sec if using medrad
Reconstructions Child 2mm I30f Larynx   Adult 3mm I30f Mediastinum
Child 0.75mm I30f Larynx   Adult 0.75mm I30f Mediastinum
Child 2mm B70f Bone    Adult 2mm Bone
Post Processing Child 2x2mm I30f Larynx Coronal MPR
Child 2x2mm I30f Larynx Sagittal MPR
Adult 3x2mm I30f Mediastinum Coronal MPR
Adult 3x2mm I30f Mediastinum Sagittal MPR
Saphire 2 on all larynx and mediastinum reconstructions 

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  • Date last published: 05 October 2017
  • Document type: Imaging Protocol
  • Services responsible: Paediatric Radiology

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