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Fig. 1. Normal enhancement and appearance of small bowel in
77-year-old woman. Axial CT scan obtained at level of kidneys with IV contrast
material and water as oral contrast agent shows enhancement of normal bowel
wall. Note thinly enhancing valvulae conniventes (arrow). This
finding is often better seen when water alone is given as oral contrast agent.
Enhancement may be obscured with positive contrast in lumen.