Common bile duct stones on multidetector computed tomography: Attenuation patterns and detectability

Figure 3 A case of difficult discrimination of common bile duct stone on the axial image of multidetector computed tomography. The coronal reconstructed image was helpful. A: The stone was ambiguous on the portal venous-phase axial computed tomography (CT) scan; B: The coronal reconstructed CT scan showed a less radiopaque stone near the major ampulla; C, D: Magnetic retrograde cholangiopancreatography and endoscopic retrograde cholangiopancreatography showed a six mm, mixed common bile duct stone.