35-Year-old female with biliary colic concerning for acute cholecystitis. Findings: contrast-enhanced CT images of the abdomen in the portal venous phase in the sagittal (1a), coronal (1b), and axial (1c) planes demonstrate empty gallbladder fossa. Technique: axial CT with sagittal and coronal reconstructions, 158 mA, 120 kV, 3 mm slice thickness, and 80 ml Omnipaque 350 intravenous contrast.