CT CAROTIDS

INDICATIONS: Acute stroke, stenosis, dissection

PATIENT PREP: NPO for solid foods, water only, for 4 hours prior to scan

IV CONTRAST: 100mL Isovue 370 @ 4-5 mL/second

ORAL CONTRAST: None

POSITIONING: Head First Supine, Arms by side

TOPOGRAMS: AP. Range:Above Circle of Willis through aortic arch. 35 mA, 120 kV

Lateral. Range: Above Circle of Willis through aortic arch. 35 mA, 120 kV

SCAN TYPE: Spiral/Helical

NOTES: Send Recon 3D 0.6x0.3mm to Vital Workstation for 3D. Bill for 3D in Charges section when ending exam: “3D POST PROCESSING CT”

CARE BOLUS triggered scan.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

MONITORING

ScanRange
CARE BOLUS
Monitoring Location / Scan Direction
Scan Type
Number of Scans / Respiration / Threshold / Scan
Delay
Seconds / CARE
DOSE
4D / mAs / CARE
kV / kV / Detector Configuration
Slices Per Tube Rotation / Table
Feed / InterScan
Delay
(CycleTime)
Seconds / Scan
Time
Seconds / SFOV
(cm)
Single Slice
Aortic Arch / Craniocaudal
Sequential
30 scans / Quiet
Respiration / 80 HU / 10
Seconds / OFF / 40 / OFF / 120 / Detectors: 1 x10.0 mm
Slices Per Tube Rotation: 1 / 0.0 mm / 1.16
Seconds / Full
0.33 Sec / 50
cm
Plane / Slice
Thickness / Interval/
Table Feed / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL SOFT TISSUE / Axial / 10.0 mm / 0.0 mm / B30s
Medium / Abdomen
300/40 / Small FOV large enough to
Cover region of interest

ARTERIAL

Scan
Range / ScanDirection
Scan Type / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / CARE
kV / Quality
Reference
kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed:
(mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Aortic Arch
Through COW / Caudocranial
Spiral/Helical / Quiet
Respiration / CARE Bolus Tracking
(Trigger 80 HU)
Plus 2 Second Delay / ON / 84 / ON / 120 / Detectors: 64 x 0.6 mm
Slices Per Tube Rotation: 32 / Pitch: 1.0
Table Increment/Speed:
19.2 mm/rotation / 0.33
seconds / 30
cm
Plane / SAFIRE
Strength / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL SOFT TISSUE / Axial / ON
2 / 1.0 mm / 1.0 mm / I30f
Medium Smooth / Mediastinum
350/50 / FOV just beyond
patient’s body
RECON – 3D AXIAL SOFT TISSUE
Send To Vital Workstation for 3D / Axial / ON
2 / 0.6 mm / 0.3 mm / I30f
Medium Smooth / Mediastinum
350/50 / FOV just beyond
patient’s body
RECON – CORONAL SOFT TISSUE MPR
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal MPR / ON
2 / 1.0 mm / 1.0 mm / I30f
Medium Smooth / Mediastinum
350/50 / FOV just beyond
patient’s body
RECON – SAGITTAL SOFT TISSUE MPR
Sagittals Angled in Plane to Body Part / Sagittals Angled in Plane to Body Part
Recon Card 3D Sagittal MPR / ON
2 / 1.0 mm / 1.0 mm / I30f
Medium Smooth / Mediastinum
350/50 / FOV just beyond
patient’s body
RECON – CORONAL MIPS
Coronal MIPS Angled in Plane to Body Part / Coronal MIPS Angled in Plane to Body Part
Recon Card 3D Coronal MIP Thin / ON
2 / 5.0 mm / 2.0 mm / I30f
Medium Smooth / CT Angio
700/80 / FOV just beyond
patient’s body
RECON – SAGITTAL MIPS
Sagittal MIPS Angle in Plane to Body Part / Sagittal MIPS Angled in Plane to Body Part
Recon Card 3D Coronal MIP Thin / ON
2 / 5.0 mm / 2.0 mm / I30f
Medium Smooth / CT Angio
700/80 / FOV just beyond
patient’s body

Page 1 of 2

*The operator must check the CTDIvol before and after the scan to ensure it is within the allowed dose range. Scans performed outside of the allowed range must be

documented and reviewed by the designated radiologist and/or physicist.

Allowed CTDIvol Dose Ranges:1 mGy – 60 mGy

XR29 Dose Notification Value (CTDIvol):60 mGy

CHARGES:Bill for 3D in Charges section when ending exam: “3D POST PROCESSING CT”

NETWORK:Exam to PACS

Recon 3D0.6x0.3mm to Vital Workstation for 3D

12/2017Page 2 of 2