Specific Anatomic RegionColon
ApplicationFocused virtual colonoscopy (i.e. stage rectal cancer)
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)140/210/.5
Detector Collimation (mm)1
Slice Thickness (mm)1.25
Data Reconstruction Interval (mm)1
Table Speed (mm per rotation) / Pitch6/6
Oral ContrastN/A (rectal air only)
IV Contrast Volume and Type120 cc of Omnipaque 350
Injection Rate3 cc/sec
Scan Delay (sec)50 sec
3D Technique UsedVolume rendering and MPR
  • The pelvis protocol is chosen, which includes a filter to reduce beam hardening artifacts. The rest of the abdomen, including the liver, can be scanned with 5mm collimation.
  • Scan from the pelvis to the diaphragm. This allows the liver to be scanned in the portal phase.