CT FACIAL

INDICATIONS: WithOut: Trauma, fracture, pain

With: Mass, infection

PATIENT PREP: WithOut: No Prep

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

IV CONTRAST: Perform as directed by the supervising radiologist.

WithOut: None

With: 80mL Isovue 370 @ 2.0 mL/second.

ORAL CONTRAST: None

POSITIONING: Head First Supine. Position head to superimpose the base of the skull and acanthion.

TOPOGRAMS: AP. Range: Below mandible through frontal sinuses. 25 mA, 110 kV.

Lateral. Range: Below mandible through frontal sinuses. 25 mA, 110 kV.

SCAN TYPE: Spiral/Helical

NOTES: Instruct patient to keep eyes closed and not roll them during scan.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

FACIAL

Scan
Range / Scan Direction
Scan Type / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Effective
mAs / kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Mandible Through
Frontal Sinuses / Caudocranial
Spiral/Helical / Quiet
Respiration / WithOut: 3 Seconds
With: 60 Seconds / OFF / 70 / 130 / Detectors: 16 x 0.6 mm
Slices Per Tube Rotation: 16 / Pitch: 0.8
Table Increment/Speed: 7.6 mm/rotation / 1.0
Seconds / 30
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL BONE / Axial / 1.0 mm / 1.0 mm / H60s
Medium Sharp FR / Osteo
1500/450 / FOV just beyond
Patient’s face
RECON – AXIAL SOFT TISSUE / Axial / 1.0 mm / 1.0 mm / H60s
Medium Sharp FR / Mediastinum
400/40 / FOV just beyond
Patient’s face
RECON – CORONAL BONE MPR
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal MPR / 1.0 mm / 1.0 mm / H60s
Medium Sharp FR / Osteo
1500/450 / FOV just beyond
Patient’s face
RECON – SAGITTAL BONE MPR
Sagittals Angled in Plane to Body Part / Bilateral Straight Sagittals
Angled in Plane to Body Part
Recon Card 3D Sagittal MPR / 1.0 mm / 1.0 mm / H60s
Medium Sharp FR / Osteo
1500/450 / FOV just beyond
Patient’s face
RECON – CORONAL SOFT TISSUE MPR
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal MPR / 1.0 mm / 1.0 mm / H40s
Medium / Mediastinum
400/40 / FOV just beyond
Patient’s face
RECON – SAGITTAL SOFT TISSUE MPR
Sagittals Angled in Plane to Body Part / Bilateral Straight Sagittals
Angled in Plane to Body Part
Recon Card 3D Sagittal MPR / 1.0 mm / 1.0 mm / H40s
Medium / Mediastinum
400/40 / FOV just beyond
Patient’s face

*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: 4 mGy – 60 mGy

XR29 Dose Notification Value (CTDIvol): 60 mGy

NETWORK: Exam to PACS.

12/2017