Figure 10a. 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 os-tomy. 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.