What should you know about ulcerative colitis ct scan?

Computed tomography uses X-rays to create cross-sectional images of the abdomen and pelvis. In someone with suspected or known ulcerative colitis, it may show thickened bowel, surrounding inflammation, or complications such as a collection, obstruction, or severe bowel dilation. It can also help look for other explanations for [Abdominal Pain](/symptoms/abdominal-pain/).

A CT scan does not replace the clinical history, blood and stool tests, or a specialist assessment. A camera test of the bowel may be needed to examine the lining and take samples, depending on your symptoms and the reason for imaging.

Ask the imaging team whether you need to avoid food or drink beforehand. Tell them if you may be pregnant, have kidney problems, have reacted to contrast before, or take regular medicines. Some scans use contrast through a vein or by mouth; the team will explain what applies to you.

After the scan, follow the hydration advice you were given and report a rash, breathing difficulty, or sudden swelling immediately. Bring the report to your clinician rather than interpreting isolated wording yourself. A [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/) can help connect the result with your symptoms and next steps.

Seek urgent help for severe abdominal pain, a swollen or rigid abdomen, persistent vomiting, heavy rectal bleeding, faintness, or inability to pass stool or gas. These features may indicate a complication and should not wait for a routine scan appointment.

Why do I need CT imaging? Will contrast be used? What alternatives are suitable? What will the scan not show? When and how will I receive the result? Could I need stool tests, endoscopy, or follow-up for [Ulcerative Colitis](/conditions/ulcerative-colitis/)?