Specific Anatomic Region	Stomach
Application	Gastric mass
Author	Horton HM, Fishman EK
Reference Source	Spiral CT of the Esophagus and Stomach (in: Spiral CT: Principles, Techniques and Clinical Applications. Fishman, Jeffrey, eds. 1998)
Scanner Used	Siemens Somatom Plus-4
Injection Rate	2-3ml/sec
Contrast Volume and Type	120ml of Omnipaque-350
Area Scanned	From diaphragm to top of iliac crest
Scan Delay	30sec
Length of Spiral (time)	Up to 40sec
Slice Thickness	3mm
Table Speed/Pitch	5mm/sec
Reconstruction Interval	2-3mm
3D Technique Used	None usually needed although virtual endoscopy may be useful.
Comment: 1. We classically would distend the stomach with 750cc of 3% Hypaque. We now routinely use 750-1000 cc of water. This allows better evaluation of the gastric wall and definition of tumors, etc. 2. Another reliable protocol is 5mm collimation and a pitch of 1 and reconstruction of data at 5mm intervals. This is primarily as a screening mode.