Specific Anatomic RegionThoracic aorta
ApplicationR/O dissection
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 or 3
Data Reconstruction Interval (mm)1 or 2
Table Speed (mm per rotation) / Pitch6/6 or 12.5/5
Oral ContrastN/A
IV Contrast Volume and Type120 cc of Omnipaque 350
Injection Rate3 cc/sec
Scan Delay (sec)25-30 sec
3D Technique UsedVolume rendering
In the case of a thoracic aorta-only study, we begin scanning at the level of the diaphragm, and scan cranially. This minimizes/eliminates artifacts related to contrast in the axillary veins.