CT Protocols - Head, Face, & Neck
Jump to navigation
Jump to search
Routine Head
Scout | lateral (90 degrees) |
Start | angle of mandible |
End | vertex of skull |
kVp | 135 |
mA | 300 |
Rotation Time | 1.0sec |
Raw Slice Thickness | 16x0.5mm |
Reconstructed Slice Thickness | 5.0mm 0.5/0.4mm |
Window Width/Window Level | 80/30 soft tissue 3000/650 bone |
Intravenous Contrast (if indicated) | Ultravist 370 50mls hand injected wait 5min |
Temporal Bones/IAMs
Scout | lateral (90 degrees) |
Start | below mastoids |
End | clear petrous bones |
kVp | 135 |
mA | 250 |
Rotation Time | 1.5sec |
Raw Slice Thickness | 16x0.5mm |
Reconstructed Slice Thickness | 0.5/0.3mm |
Window Width/Window Level | 4500/500 |
Intravenous Contrast (if indicated) | Ultravist 370 50mls hand injected wait 5min |
Multiplanar Reconstructions | axial 1-2mm thick coronal 1-2mm thick |
Circle of Willis (COW) CTA
Scout | lateral (90 degrees) |
Start | below base of skull |
End | clear COW and anterior cerebrals |
kVp | 120 |
mA | 250 |
Rotation Time | 0.5sec |
Raw Slice Thickness | 16x0.5mm |
Reconstructed Slice Thickness | 3.0mm 0.5/0.3mm |
Window Width/Window Level | 600/120 |
Intravenous Contrast (if indicated) | Ultravist 370 100mls 4.0-4.5mls/sec manual SureStart below base of skull when contrast in carotids/vertebrals |
Multiplanar Reconstructions | MIPs and curved MPRs volume rendered 3Ds |
Facial Bones/Sinuses
Scout | lateral (90 degrees) |
Start | inferior maxilla below mandible (facial bones) |
End | clear frontal sinuses |
kVp | 120 |
mA | 180 facial bones 60 sinuses (low dose) |
Rotation Time | 0.5sec |
Raw Slice Thickness | 16x0.5mm |
Reconstructed Slice Thickness | 0.5/0.4mm |
Window Width/Window Level | 3000/650 facial bones 2500/350 sinuses |
Intravenous Contrast (if indicated) | Ultravist 370 50mls hand injected wait 5min |
Multiplanar Reconstructions | axial 2-3mm thick coronal 1.5-2mm thick sagittal 1.5-2mm thick |
Soft Tissue Neck
Scout | lateral (90 degrees) anterior posterior (0 degrees) |
Start | mid sphenoid |
End | thorocic inlet |
kVp | 135 |
mA | auto |
Rotation Time | 0.5sec |
Raw Slice Thickness | 16x1.0mm |
Reconstructed Slice Thickness | 5.0mm 1.0/0.8mm |
Window Width/Window Level | 300/40 |
Intravenous Contrast (if indicated) | Ultravist 370 100mls 2.0-2.5mls/sec 30sec delay |
Carotid Arteries CTA
Scout | lateral (90 degrees) anterior posterior (0 degrees) |
Start | below aortic arch |
End | COW |
kVp | 135 |
mA | 300 |
Rotation Time | 0.5sec |
Raw Slice Thickness | 16x0.5mm |
Reconstructed Slice Thickness | 3.0mm 0.5/0.3mm |
Window Width/Window Level | 600/120 |
Intravenous Contrast (if indicated) | Ultravist 370 150mls 4.0-4.5mls/sec SureStart ROI on arch 120HU |
Multiplanar Reconstructions | MIPs and curved MPRs volume rendered 3Ds |