Specific Anatomic RegionAppendix/Cecum
ApplicationR/O Appendicitis
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)120/165/.5
Detector Collimation (mm)2.5
Slice Thickness (mm)3 or 5
Data Reconstruction Interval (mm)3 or 5
Table Speed (mm per rotation) / Pitch12.5/5
Oral Contrast750-1000 cc of 3% Hypaque
IV Contrast Volume and Type100-120 cc of Omnipaque 350
Injection Rate2 cc/sec
Scan Delay (sec)50 sec
3D Technique UsedN/A
The topic of appendicitis is controversial only in defining an ideal protocol. Popular protocols (all with excellent results in the literature) include using no oral or IV contrast, using both IV and oral contrast, using rectal contrast, or oral contrast only. I like using IV contrast for a number of reasons including the fact that in many cases other diagnoses are the cause of the patients symptoms and are best detected with IV contrast.