 Following each imaging procedure, the interpreting physician will complete both small intestine and colon anatomy forms. The physician will identify all types of lesions present and also give both a global evaluation of the severity of lesions found and a global Crohns disease activity score indicating one of the following: active Crohns disease, suspicious for Crohns disease, inactive Crohns disease, or no evidence of Crohns disease. Co-investigators representing each of the diagnostic modalities will meet periodically to review those cases where there is disagreement among the imaging procedures with respect to the extent and severity of small intestinal Crohns disease in order to reach a consensus clinical diagnosis. This consensus clinical diagnosis will serve as the gold standard against which each of the individual imaging modalities is evaluated. Sensitivity, positive predictive value, and accuracy of all diagnostic modalities compared to the consensus clinical diagnosis will be determined. A Crohns disease capsule endoscopy index of severity CDCEIS will be created after the CE studies have been reviewed by investigators from other referral centers both inside and outside the United States to determine the inter-observer agreement reproducibility for each type of small bowel lesion identified by CE. Logistic regression analysis with step-wise deletion will then be utilized to create the CDCEIS using only those lesions that are reproducible, with the global Crohns disease endoscopic activity score from the CE as the dependent variable. 