CT Protocols: (Brain, ENT, Spine, Vascular) - Department of Radiology

105 Revised 7/22/09 (Gentry/Ranallo)
Patient Age: Choose the CT scan factors on the scanner for the proper age range of the patient
1. Child: (3 – 6 years)
2. Infant: (0 – 3 years)
Smart Prep
Prep Over
mA
Monitoring Delay
(sec)
Monitoring
ISD (sec)
Enhancement
Threshold
Aortic Arch 40 10.0 3.0 50
Diagnostic Delay (sec)
LS VCT64: 10.0
LS Xtra, LS 16 & 16 Pro: 8.0
LS 8: 5.0
Lumbar Spine: Routine
Pediatric Infant (0 – 3 yr)
Scanner GE LS Xtra GE LS 16 GE LS 16 Pro GE LS VCT 64 GE LS 8
Scan Type Helical Helical Helical Helical Helical
Rotation Time (sec) 0.6 0.8 0.5 0.5 0.9
Detector Coverage (mm)
Beam Collimation (mm)
10 10 10 20 10
Detector Rows 16 16 16 16 8
Pitch 0.562 0.562 0.562 0.531 0.625
Speed (mm/rot) 5.625 5.625 5.625 10.62 6.25
Detector Configuration 16 x 0.625 16 x 0.625 16 x 0.625 64 x 0.625 8 x 1.25
Slice Thickness (mm) 1.25 1.25 1.25 1.25 1.25
Interval (mm) 0.75 0.75 0.75 0.625 0.75
Scan FOV Small Small Small Small Body Small
kV 80 80 80 80 80
Smart mA/ Auto mA Range 160-675 90-400 150-675 140-650 90-400
Noise Index 11.3 11.3 11.3 11.3 11.3
(Manual mA) 280 170 270 260 170
Recon 1:
DFOV 18 18 18 18 18
Recon Type Standard Standard Standard Standard Standard
WW/ WL 450/60 450/60 450/60 450/60 450/60
Recon Option Plus Plus Plus Full Plus
Recon Option
Recon 2:
IQ Enhance
DFOV 18 18 18 18
Recon Type Bone Plus Bone Plus Bone Plus Bone Plus
WW/ WL 3000/300 3000/300 3000/300 3000/300
Recon Option Plus Plus Plus Full
Recon Option
IQ Enhance
Slice Thickness (mm) 0.625 0.625 0.625 0.625
Interval (mm) 0.375 0.375 0.375 0.312
Recon 3:
DFOV 18 18 18 18 18
Recon Type Bone Plus Bone Plus Bone Plus Bone Plus Bone Plus
WW/ WL 3000/300 3000/300 3000/300 3000/300 3000/300
Recon Option Plus Plus Plus Full Plus
Recon Option
Non-Contrast or Contrast
CT 1 CT 2 CT 3 CT 4 & ER CT East & RP CT
IQ Enhance
Slice Thickness (mm) 1.25 1.25 1.25 1.25 1.25
Interval (mm) 0.75 0.75 0.625 0.75