Computed tomographic (CT) enterography is a non-invasive technique for the diagnosis of small bowel disorders. CT enterography, similarly to MRI enterography, is most commonly used to evaluate patients with Crohn disease where it is used for assessment of the primary disease and any complications. Other indications include celiac disease, postoperative adhesions, radiation enteritis, scleroderma, small bowel malignancies, and polyposis syndromes.

Abstain from all food and drink 4-6 hours before the exam

Patients drink about 1.5 L of oral contrast over 30-60 minute

Adequate luminal distension is necessary as collapsed bowel loops may mimic pathology

CT enterography utilizes negative or neutral oral contrast ^1-3

Attenuation similar to that of water - e.g. water, PEG, mannitol, methylcellulose, locust bean gum, and low-density barium sulphate preparations (Volumen, 0.1% W/V)

Fluid distension of the small bowel allows better assessment of mucosal enhancement, mural thickness as well as mesenteric vasculature, this is important especially in the evaluation of Crohn disease â€‹CT scanning is ideally performed on a multi-detector computed tomography (MDCT) scannerintravenous contras

Crohn disease, celiac disease, postoperative adhesions, radiation enteritis, and scleroderma: a single enteric phase where peak mucosal enhancement is achieved is sufficient - either enteric phase (45-50s) or portal venous phase (60-70s)

small bowel tumors: an additional arterial phase can be performed, in particular for the assessment of hypervascular lesions (e.g. neuroendocrine tumors)

in cases of suspected GI bleeding, pre-contrast, arterial, portal venous, and delayed phases should be considered

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