Specific Anatomic Region | Circle of Willis |
Application | R/O aneurysm |
Author | Katz DA et al. |
Reference Source | Radiology 1995; 195:445-449 |
Scanner Used | Siemens Somatom Plus-S |
Injection Rate | 3ml/sec |
Contrast Volume and Type | 90ml of Omnipaque-300 |
Area Scanned | Entire brain (if possible) |
Scan Delay | Test-dose timing (usually 15-25sec) |
Length of Spiral (time) | 40sec |
Slice Thickness | 1mm |
Table Speed/Pitch | 1.3mm/sec with a pitch of 1.3 |
Reconstruction Interval | 0.5mm |
3D Technique Used | None used |
Comment: - Spiral compared favorably with MRI. We like to use 3D imaging with volume rendering when looking at the aneurysm and its vascular anatomy. By using fly-around virtual techniques the neck of the aneurysm is best seen.
- Preset delays of 20 sec work well in these cases.
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