Updated 04/06/25 CT Peds Head Reviewed 05/15/25 Indications - trauma, headache, hemorrhage, altered mental status, dizziness, syncope, mass. Do not perform a with IV only exam unless a noncontrast head has been performed within last 6 hours. Change order to CT Head w/o + w/. NEVER perform a multiphase or without and with exam on a pediatric patient unless approved by a rad. GENERAL SCAN NOTES Remove any metal from the imaging field of view. For all pediatric head studies, it is very important for image quality purposes to position the patient in the center of the scan field. Use the lateral laser beam to make sure that the patient is positioned in the center. Position patient's head so that the line connecting the lateral canthus of the eye and the EAC is perpendicular to the CT tabletop. Topogram - C1 vertebrae through top of head. Craniocaudal scan coverage - C1 vertebrae through top of head. Avoid scanning the lens of the eyes. Adjust FOV (field of view) on topogram to smallest without cropping anatomy. IV Contrast: Weight-based Omnipaque-300, inject at 2 mL/sec, 22-gauge or larger, 3 mins scan delay. For GE scanners, it is essential for the 1st recon thickness on the scanner to match the 1st recon thickness in this protocol book for the prescribed Noise Index to be valid. The 1st recon should generally be the thickest recon in the protocol.

CT Peds Head SIEMENS SPIRAL SCAN PARAMETERS & RECONS Scan
Care
Scan
Mode kV mAs Care
Dose kV & Lvl Pitch Acq Coll Rot Time Time Sensation 16 spiral 120 150 on NA 0.55 16 1.5 1.0 9.1 Go Up 32 spiral 110 314 on on 345 0.55 32 0.7 1.0 9.7 Sensation 64 spiral 120 190 on NA 0.85 64 0.6 1.0 7.4 Definition 64 spiral 100 300 on on 0.80 64 0.6 1.0 7.8 Go Top 64 spiral 100 394 on on 345 0.55 64 0.6 1.0 5.7 Drive 128 spiral 100 255 on on 0.80 128 0.6 1.0 3.9 Force 192 spiral 100 248 on on 0.80 192 0.6 1.0 2.6 Recon
Name of Series Thick Interval Kernel Window IR
Lvl Direction AX SOFT 3.0 3.0 Hr40 / C30s cerebrum 3 feet/head TRUE AX SOFT 3.0 3.0 Hr40 / C30s cerebrum 3 feet/head COR SOFT 3.0 3.0 Hr40 / C30s cerebrum 3 front/back AX BONE 2.0 2.0 Br59 / C60s bone 3 feet/head SIEMENS SEQUENTIAL SCAN PARAMETERS & RECONS Scan
Care
Care

Colli-
Feed / Scan Cycle mAs Dose Detect mation Scan Time Time Mode kV Ref kV & Lvl Sensation 16 sequential 120 150 on NA 12 1.5 18.0 1.0 2.0 Go Up 32 sequential 2.0 Sensation 64 sequential 120 190 on NA 24 1.2 28.5 1.0 2.0 Definition 64 sequential 100 300 on on 64 0.6 17.0 1.0 2.0 Go Top 64 sequential 2.0 Drive 128 sequential 100 210 on on 128 0.6 34.5 4.0 1.0 Force 192 sequential 100 204 on on 192 0.6 48.0 1.0 3.5 Recon
Name of Series Thick Interval Kernel Window IR
Lvl Direction 2.4 2.4 AX SOFT Hr40 / C30s cerebrum 3 feet/head 3.0 (16 slice) 3.0 (16 slice) 2.4 2.4 TRUE AX SOFT Hr40 / C30s cerebrum 3 feet/head 3.0 (16 slice) 3.0 (16 slice) COR SOFT Hr40 / C30s cerebrum 3 front/back 3.0 3.0 2.4 2.4 AX BONE Br59 / C60s bone 3 feet/head 3.0 (16 slice) 3.0 (16 slice)

CT Peds Head GE PARAMETERS & RECONS HELICAL SCAN For patients 0-15 years of age: Scan
mA
Smart
Slice
Beam
Dose
Type SFOV kV Noise
Index Range mA Thick Coll Pitch Speed Rot
Time Red ASIR Scan
Time LS 16 helical head 120 6.00 0.562 11.25 100-190 on 2.5 10 0.5 NA NA 5.3 Opt 540 helical head 120 6.00 on 2.5 10 0.562 11.25 0.5 NA NA 5.3 100-190 LS VCT 64 helical small head 120 100-200 8.49 on 2.5 20 0.531 10.62 0.5 0 0 5.6 Disc VCT 64 helical small head 120 100-200 8.49 on 2.5 20 0.531 10.62 0.5 NA NA 5.6 For patients 15-18 years of age: LS 16 helical head 120 100-220 0.562 11.25 11.31 on 2.5 10 NA 5.3 0.5 NA Opt 540 helical head 120 100-220 11.31 on 2.5 10 0.562 11.25 0.5 NA NA 5.3 LS VCT 64 helical small head 120 100-220 11.31 on 2.5 20 0.531 10.62 0.5 0 0 5.6 Disc VCT 64 helical small head 120 100-220 11.31 on 2.5 20 0.531 10.62 0.5 NA NA 5.6 AXIAL SCAN For patients <18 mths of age: Scan
Smart Pitch /
Slice
Beam
Rot
Dose
ASIR SFOV kV Manual
Thick Coll Time Red Type mA mA Speed LS 16 120 off axial ped 120 2.5 10 2i 1.0 NA NA Opt 540 axial ped 120 120 off 2.5 10 2i 1.0 NA NA LS VCT 64 20 4i 0.5 30 30 axial ped head 120 170 off 2.5 0.5 Disc VCT 64 axial ped head 120 240 off 2.5 20 4i NA NA For patients 18 mths to 5 years of age: LS 16 axial head 120 170 off 2.5 10 4i 1.0 NA NA Opt 540 axial head 120 170 off 2.5 10 4i 1.0 NA NA LS VCT 64 axial small head 120 235 off 2.5 20 4i 0.5 30 30 Disc VCT 64 axial off 2.5 20 4i 0.5 NA NA small head 120 335 For patients 5-18 years of age: LS 16 axial head 120 2.5 10 4i 230 off 1.0 NA NA Opt 540 axial head 120 230 off 2.5 10 4i 1.0 NA NA LS VCT 64 axial small head 120 125 off 2.5 20 4i 1.0 30 30 Disc VCT 64 axial small head 120 180 off 2.5 20 4i 1.0 NA NA

CT Peds Head GE RECONS Window
Recon
Name of Series Thickness Interval Recon
Algorithm Width/Level Direction AX SOFT 2.5 2.5 std full 80/40 feet/head Must be first recon. TRUE AX SOFT 2.5 2.5 std full 80/40 feet/head COR SOFT 2.5 2.5 std full 80/40 front/back AX BONE 2.5 2.5 bone full 2500/480 feet/head PHILIPS PARAMETERS & RECONS HELICAL SCAN Scan
Dose
3D
Rot Scan
Mode kV Avg
mAs Index Dose Pitch Detect Colli Time Time 0.5 3.8 Incisive 128 helical 120 208 35 on 0.40 64 0.625 RECONS Recon
Name of Series Thick Interval Filter Window iDose Direction AX SOFT 3.0 3.0 UB 1 feet/head brain TRUE AX SOFT 3.0 3.0 UB brain 1 feet/head COR SOFT 3.0 3.0 UB brain 1 front/back AX BONE 3.0 3.0 YB bone 1 feet/head