 All patients will have a CT enterography with peroral contrast interpreted by a co-investigator radiologist. All patients will undergo a clinically indicated colonoscopy with ileoscopy by a staff co-investigator not by C.A.S. or the staff co-investigator interpreting the CE, and a Crohns Disease Endoscopic Index of Severity CDEIS will be calculated. If no significant small bowel strictures are identified by CT enterography or colonoscopy with ileoscopy, then patients will subsequently undergo CE. All CE studies will be read separately by C.A.S. gastroenterology fellow and a supervising staff gastroenterologist co-investigator, each blinded to the others interpretation. The interobserver agreement between C.A.S. and the co-investigator staff will be determined. Patients will lastly have a clinically indicated small bowel follow-through interpreted by a co-investigator radiologist. All co-investigators will be blinded to the results of the other imaging modalities until after interpreting their respective studies. 