Fig. 4From: Increased enhancement of the liver adjacent to the gallbladder seen with contrast ultrasound: comparison between acute cholecystitis and non-cholecystitisReceiver operating characteristic curve (ROC) of the intensity ratio for the diagnosis of acute cholecystitis. The area under the curve, indicating the diagnostic power, was estimated as 0.852 (95 % CI, 0.709–0.995)Back to article page