CT Imaging of Acute Bowel Ischemia and Infarction - Department of ...

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CT Findings: Distribution • i.e. may provide clues to etiology • (a) Diffuse • (b) Segmental – Vascular territories – Watershed areas
CT Findings: Bowel Thickening • s/t mural edema, hemorrhage, superinfection • Most SN, least SP (for ischemia, NOT infarction) • Range of SN = 26-96% – (a) ischemic colitis = 94% – (b) mesenteric ischemia = 80% – (c) bowel infarction = 26-38% • Occlusive = non-occlusive • Venous >> Arterial • (a) Hypoattenuating vs. hyperattenuating – Hypoattenuation = edema – Hyperattenuation = hemorrhage • (b) Differential bowel wall enhancement – i.e. mucosal hyperenhancement – s/t hyperemia (i.e. reperfusion or superinfection) – SN 33% SP 71% – Produces target sign
Page 1 and 2: CT Imaging of Acute Bowel Ischemia
Page 3 and 4: Anatomy Vascular Supply of Bowel: A
Page 5 and 6: Anatomy Vascular Supply of Bowel: V
Page 7 and 8: Pathology Ischemia and Infarction:
Page 9 and 10: Pathology Etiologies 1. Occlusive (
Page 11 and 12: Pathology Etiologies: Occlusive SMA
Page 13 and 14: Pathology Etiologies: Occlusive Aor
Page 15 and 16: Pathology Etiologies: Non-occlusive
Page 17 and 18: CT Technique: Ischemic Bowel Protoc
Page 19: CT Findings: Approach • Distribut
Page 23 and 24: CT Findings: Fluid • (a) Fat stra
Page 25 and 26: CT Findings: Air Pneumotosis Portal
Page 27 and 28: CT Findings: Complications • Perf
Page 29 and 30: Cases Case #1: Large bowel ischemia
Page 31 and 32: Cases Case #2: Large bowel ischemia
Page 33 and 34: Cases Case #3: Small bowel Ischemia
Page 35 and 36: Cases Case #4: Small and large bowe
Page 37 and 38: Cases Case #5: Small bowel obstruct
Page 39: Cases 1. 2678623 = large bowel isch

CT Imaging of Acute Bowel Ischemia and Infarction - Department of ...

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