Medical Imaging Abdominal

Pneumoperitoneum - Crescent sign

Crescent sign - Upright abdominal radiograph showing abnormal presence of air under the right hemidiaphragm (arrow; left image).
LLD abdominal radiograph showing air over the liver (arrow; right image).
[Courtesy of Dr. N. Jaffer]

Normal AXR Small & Large Bowel Liver & Spleen

Misty Mesentery Barium Enema Barium Retrograde

Crohn's Disease - string sign Crohn's Disease Volvulus Volvulus - U-sign Enteroclysis Small Bowel Obstruction - AXR Small Bowel Obstruction - String

Appendicitis Acute Diverticulitis Colon Cancer Ischemia Ulcerative Colitis Volvulus Large Bowel Obstruction (Volvulus) Large Bowel Obstruction Large Bowel Obstruction - CT Toxic Megacolon Ulcerative Colitis - Barium Virtual Colonoscopy Diverticular Disease Colon Carcinoma

Esophagus & Stomach

Achalasia (closed) Achalasia (open) Esophageal Stenosis Gastric Varices

Polycystic Liver Cholangiogram Gallbladder (CT) Gallbladder (US) Cholecystitis Liver (US) Dilated Bile Duct Hepatocellular Carcinoma Hepatic Metastases Liver metastases Common Bile Duct

Pancreas - CT Pancreas - Injected Dye Acute Pancreatitis - CT Pancreatitis

Ascites - AXR Ascites - CT Ascites - CT (Massive) Pneumoperitoneum - Crescent sign Pneumoperitoneum - Cupola sign Pneumoperitoneum - Rigler's sign Pneumoperitoneum - Supine

Retroperitoneum

Retroperitoneal Air - AXR Retroperitoneal Air - CT

Angiograms Angiogram - CT Abdominal Aortic Aneurysm (AAA) Inferior Mesenteric Arteriogram

Intraparenchymal Hematoma Subcapsular Hematoma Collecting System Leak Hepatic Laceration Intramural Hematoma Mesenteric Hematoma Free air from a perforation Splenic Hematoma Pancreatic Laceration Pancreatic Contusion

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