|Specific Anatomic Region||Circle of Willis|
|Author||Katz DA et al.|
|Reference Source||Radiology 1995; 195:445-449|
|Scanner Used||Siemens Somatom Plus-S|
|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|
|Table Speed/Pitch||1.3mm/sec with a pitch of 1.3|
|3D Technique Used||None used|
- 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.