CT SINUS ROUTINE

INDICATIONS:WithOut:Sinusitis

With:Tumor

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 Glabelloalveolar Line horizontal/parallel to z-axis. No tilt or rotation.

TOPOGRAMS:Lateral. Range: Below maxillary sinuses through frontal sinuses. 35 mA, 120 kV.

SCAN TYPE:Spiral/Helical

NOTES:ALARA – Keep radiation dose As Low As Reasonably Achievable.

SINUS ROUTINE

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / CARE
kV / Quality
Reference
mAs / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Below Maxillary Sinuses Through
Frontal Sinuses / Caudocranial / Quiet
Respiration / WithOut: 4 seconds
With: 60 seconds / ON / 50 / ON / 120 / Detectors: 64 x 0.6 mm
Slices Per Tube Rotation: 32 / Pitch: 0.8 mm
Table Increment/Speed:
15.36 mm/rotation / 1.0
Seconds / 30
cm
Plane
Positioning and Reformat Angles / SAFIRE
Strength / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON
Axial / Axial: Position Glabelloalveolar Line
horizontal/parallel to z-axis / OFF / 3.0 mm / 3.0 mm / H60s
Sharp FR / Sinuses
2000/400 / FOV to include all sinuses
Include tip of nose
RECON
Coronals Perpendicular to hard pallete / Coronals Perpendicular to hard pallete
Frontal Sinus Through Sphenoid Sinus
Recon Card 3D Coronal MPR / OFF / 1.0 mm / 1.0 mm / H60s
Sharp FR / Sinuses
2000/400 / FOV to include all sinuses
Include tip of nose
RECON
Sagittals Parallel to Mid-Sagittal Plane / Sagittals Parallel to Mid-Sagittal Plane
Through All Sinuses
Recon Card 3D Sagittal MPR / OFF / 1.0 mm / 1.0 mm / H60s
Sharp FR / Sinuses
2000/400 / FOV to include all sinuses
Include tip of nose

CHARGES:WithOut: CSIN

With: CSINCO

NETWORK:Exam to PACS

2/2017