Specific Anatomic RegionAbdominal aorta
ApplicationEvaluate known or suspected AAA
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)120/165/.5
Detector Collimation (mm)1 or 2.5
Slice Thickness (mm)1.25 or 3
Data Reconstruction Interval (mm)1 or 2
Table Speed (mm per rotation) / Pitch12.5/5 or 6/6
Oral Contrast750 cc of water
IV Contrast Volume and Type120 cc of Omnipaque 350
Injection Rate3 cc/sec
Scan Delay (sec)25 sec
3D Technique UsedVolume rendering
This protocol allows a compromise between length of study and 3D detail. When using 3 mm collimation, the entire abdominal aorta (and iliacs aa.) are scanned in 16-20 seconds.