Oral Contrast
1. Why do we use oral contrast? | |
Oral contrast is used to opacify or identify the GI tract be it esophagus, stomach, small bowel or colon. Depending on the clinical situation we will use different agents for study optimization. The two most common agents are positive agents (i.e. oral Omnipaque in solution) or neutral agents like water or air. An important role of oral contrast is to separate intraluminal contrast from extraluminal collections (i.e. abscess) to allow for accurate detection of an abscess in the patient with an FUO. Proper use of oral contrast also allows us to routinely detect GI tracts tumors which will otherwise often go undiagnosed early. |
Contrast in Stomach has Attenuation of 252H | |
Small bowel attenuation is 263H | |
Normal ileum at 35 minutes post oral ingestion | |
Crohns disease | |