CT enterography may be recommended if a patient has symptoms such as abdominal pain, diarrhea, weight loss, or blood in the stool, and there is a suspicion of inflammatory bowel disease, such as Crohn’s disease or ulcerative colitis. CT colonography may be recommended for colorectal cancer screening or if a patient has symptoms such as abdominal pain, changes in bowel habits, or blood in the stool, and there is a suspicion of colorectal cancer or polyps.