When looking at the ultrasound report, the following 4 main aspects should be noted: Size of the gallbladder: In the case of acute cholecystitis, the gallbladder will be found to be enlarged, mainly due to the accumulation of fluid in the gallbladder. In the case of chronic cholecystitis, sometimes the size of the gallbladder decreases significantly, suggesting that there is atrophy of the gallbladder, indicating that the gallbladder has lost its normal function. Thickness of the gallbladder wall: The normal gallbladder wall is very thin, about 1 to 2 mm. If the report shows a gallbladder wall thickening of 3 to 4 mm, it often suggests chronic cholecystitis. When the gallbladder wall is significantly thickened by 5 mm or more, or even found to be double-layered, this often suggests significant edema of the gallbladder wall, which is a sign of acute cholecystitis. Number, size and location of gallbladder stones: Ultrasound can easily detect stones in the gallbladder, so the size of the stones, whether they are single or multiple, and whether they are in the neck of the gallbladder are usually mentioned in the report, and this information is important for the physician to feel the treatment plan. However, it is worth noting that the size of gallbladder stones as reported in the ultrasound report is not absolute, because each ultrasound physician uses different angles and different sections when measuring, so there is a certain amount of error. Therefore, when we check the ultrasound twice, if there is some slight change in the size of the stone, it does not mean that the stone has increased or decreased in size, but we should judge whether the stone has changed after several times of examination and then according to the trend of change. The diameter of the common bile duct: This is a very important piece of information. In normal people, the diameter of the common bile duct is about 4-6 mm directly, and when the diameter of the common bile duct is 10 mm or more, the diagnosis of dilated common bile duct can be made. Ultrasound examination can detect the presence of stones in the common bile duct or intrahepatic bile duct. If the common bile duct is dilated with stones, the treatment is very different from that of a simple gallbladder stone. If ultrasound does not reveal the cause of bile duct dilatation, further CT or MRCP examinations are needed to clarify the diagnosis.