Gallstone Ileus on CT Scans Gallstone Ileus on CT Scans

Findings: This CT demonstrates the classic Rigler’s Triad of gallstone ileus: Pneumobilia (air in the biliary tract), low...

Diverticulitis of the Sigmoid Colon with Extraluminal Air on CT Scan Diverticulitis of the Sigmoid Colon with Extraluminal Air on CT Scan

Findings: There are diverticula and thickening of the walls of the sigmoid colon with an adjacent extraluminal air pocket...

Subcutaneous emphysema and air within the pectoralis muscle Subcutaneous emphysema and air within the pectoralis muscle

Findings: Air is lucent (jet black) on plain film. There is streaky air in the subcutaneous tissue on the right. Notice the...

Free Abdominal Air aka Pneumoperitoneum on CXR Free Abdominal Air aka Pneumoperitoneum on CXR

Findings: The CXR demonstrates crescentic lucent air collections below both hemidiaphragms. This is the classic appearance...

Left inferior pneumothorax Left inferior pneumothorax

Findings: A pneumothorax is air between the visceral and parietal pleura. Air is lucent (jet black) on plain film. Air in...

Hyoid Fracture with Abscess Complicating a Blow to the Neck on CT Scans Hyoid Fracture with Abscess Complicating a Blow to the Neck on CT Scans

Findings: The CT scans demonstrate a fractured hyoid bone, gas bubbles in an abscess producing mass effect, and narrowing of...

Left pneumothorax producing deep sulcus sign on supine views Left pneumothorax producing deep sulcus sign on supine views

Findings: A pneumothorax is air between the visceral and parietal pleura. Air is lucent (jet black) on plain film. A...

Left skin fold mimicking pneumothorax Left skin fold mimicking pneumothorax

Findings: Elderly or cachectic patients have loose skin which may fold. A skin fold presents as a line which may be confused...

Liver Abscess, Pneumobilia, and Portal Vein Thrombosis on CT Scans Liver Abscess, Pneumobilia, and Portal Vein Thrombosis on CT Scans

Findings: There is a large abscess in the left and caudate lobes of the liver containing fluid and air. There is resultant...

Lung Contusion, Rib Fractures, and Aberrant Air Collections on CXR and CT Scan Lung Contusion, Rib Fractures, and Aberrant Air Collections on CXR and CT Scan

Findings: The CXR demonstrates aberrant air collections: pneumomediastinum, deep cervical emphysema, and subcutaneous...

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