Specific Anatomic RegionLiver
ApplicationSuspected hepatoma (dual phase study)
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)120/165/.5 (both phases)
Detector Collimation (mm)2.5 or 1
Slice Thickness (mm)3-5 or 1.25
Data Reconstruction Interval (mm)3-5 or 1
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)30 sec/60 sec
3D Technique UsedVolume rendering/MIP (if needed)
Comments:
  • This is a dual phase study, and requires both arterial and portal phase studies. Some will recommend a non-contrast phase as well. Also, some will suggest that the portal/delayed phase be at 80-100 seconds. In this protocol, 3D imaging is optional, and is usually used if a tumor is detected and surgical planning is needed.
  • When 3D imaging is requested we use 1 mm detectors with 1.25 collimation and reconstruction at 1 mm intervals.