Figure 10b. Small bowel obstruction in a 34-year-old woman with a history of ulcerative colitis and prior total colectomy who was 19 weeks pregnant and presented with nausea, vomiting, and abdominal pain. (a) Coronal T2-weighted single-shot fast SE image of the abdomen and pelvis shows the gravid uterus with the placenta (P). There is diffuse dilatation of fluid-filled loops of small bowel. Well-circumscribed areas of high signal intensity surround the bowel (arrows) and conform to the borders of the abdominal wall, a finding indicative of free fluid. (b) Sagittal T2-weighted single-shot fast SE image of the RLQ shows the dilated, fluid-filled small bowel loops. The patient’s ostomy (large arrowhead) is collapsed, and the end ileal loop (arrow) tapers abruptly to the ostomy; these findings indicate the transition point of the small bowel obstruction caused by stenosis at the level of the ostomy. The free fluid is seen beneath the small bowel loops (small arrowhead). The small bowel obstruction was relieved after placement of a catheter and dilation of the ostomy.