Pericardial effusion

Patient A	Patient A	Patient B
Patient C	Patient C	Patient C

Oreo cookie sign on lateral Patient C.

Imaging Findings in Cardiac Tamponade with Emphasis on CT

• Enlarged SVC with diameter equal to adjacent aorta
• Enlarged IVC with diameter twice adjacent aorta
• Reflux into hepatic or azygous veins
• Enlargement of hepatic or renal veins