Specific Anatomic RegionCircle of Willis
ApplicationR/O aneurysm/evaluate aneurysm
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)120/109/.5 or 120 /165/ .5
Detector Collimation (mm).5 or 1
Slice Thickness (mm)1 or 1.25
Data Reconstruction Interval (mm)1
Table Speed (mm per rotation) / Pitch1.3/2.6 or 6/6
Oral ContrastN/A
IV Contrast Volume and Type100-120 cc of Omnipaque 350
Injection Rate3 cc/sec
Scan Delay (sec)15-20 sec
3D Technique UsedVolume rendering
A key to this study is the quality of the dataset for 3D imaging.