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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.

Guideline identity image

CT - Thorax Flash

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Hand bolus injection remove 20s delay
?CCAM, CPAM and sequestration require IV contrast and imaging should include the liver to look for an anomalous artery


CCAM - congenital cystic adenomatoid malformation
CPAM - congenital pulmonary airways malformation

Indication - for all Children unable to breath hold
- trauma
- chest wall disorders
- pulmonary mass
- pleural disease
- mediastinum studies
- ?TB
- sequestration
Patient Preparation 4 hours nil by mouth if IV contrast is required. 20 or 22 gauge cannula in antecubital fossa
Patient Position - feet first
- supine
- arms raised above head and placed on a pillow
Scan Area Apices to the base of the lungs
kV/Quality ref mAs/
Time per rotation
Care kV and
Care Dose 4D on
Child 100
Adult 120
Child 100
Adult 120
Detector Collimation  0.6
Slice Thickness 3mm Pitch 3
IV Contrast 2mL/kg 300 concentration. Max dose 70mls.  1.5 - 3 mL/sec medrad
Scan Delay 20s delay when using the medrad. Hand bolus attempt to begin scan 20sec from start of contrast injection
Reconstructions 3mm       I30f Mediastinum
3mm       B70f Baby Lung (B70f Lung-adult)
0.75mm  I30f Mediastinum
0.75mm  B70f Baby Lung (B70f Lung-adult)
Post Processing  3mm I30f Mediastinum Coronal MPR
3mm B70f Baby Lung (B70f Lung-adult) Coronal MPR
3mm I30f Mediastinum Sagittal MPR
3mm B70f Baby Lung (B70f Lung-adult) Sagittal MPR
Saphire 2 on all mediastinum reconstructions 

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

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