CT Protocols - Head, Face, & Neck
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scan routine head post-contrast
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 |