Specific Anatomic RegionCircle of Willis
ApplicationDetection and assessment of intracranial aneurysm
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)120/109/.5 or 120/200/.5
Detector Collimation (mm)1
Slice Thickness (mm)1.25
Data Reconstruction Interval (mm)1
Table Speed (mm per rotation) / Pitch5/5 or 6/6
Oral ContrastN/A
IV Contrast Volume and Type100-120 cc of Omnipaque 350
Injection Rate3 cc/sec
Scan Delay (sec)20 sec
3D Technique UsedVolume rendering
The key is to acquire all of the data in the arterial phase.