Hepatobilliary

Abdominal axial CT scan showing numerous cysts within the liver parenchyma. [Courtesy of Dr. N. Jaffer]

The US is of a liver. The hypoechoic areas represent the biliary system, whereas the hyperechoic regions are suggestive of steatohepatosis (fatty liver). The sharply delineated hyperechoic margin of the liver represents the diaphragm. [Courtesy of Dr. N. Jaffer]

Liver metastases from breast cancer

Abdominal axial CT showing a large, well-circumscribed HCC within the liver parenchyma of a patient with chronic hepatitis C infection.

Abdominal axial CT showing numerous well-circumscribed metastases in a patient with primary adenocarcinoma of the breast. [Courtesy of Dr. N. Jaffer]

In the US image presented here, the hypoechoic region, superior and to the left, represents the liver, while the markedly hypoechoic region, central and to the right, represents the gallbladder. [Courtesy of Dr. N. Jaffer]

The purpose of this CT is to illustrate where to localize the gallbladder.
Note the liver at the 9 o’clock position with the gallbladder at the 10 o’clock position.

Transabdominal ultrasound showing dilated bile duct. [Courtesy of Dr. N. Jaffer]

Stone in the Common Bile Duct (CBD)
Stone in the CBD just at the take-off of cystic duct. [Courtesy of Dr. G Haber]

Acute Cholecystitis
Abdominal axial CT scans showing pericholecystic fluid (arrow, left image) and mucosal thickening of gallbladder wall (arrow, right image). [Courtesy of Dr. N. Jaffer]