Also take a look at intrahepatic bile ducts to rule out obvious dilation.
<gallerymode=packed heights=230>File:Ultrasonography of dilated bile ducts.jpg|[[Abdominal Doppler ultrasonography]] (with Doppler) of dilated intrahepatic bile ducts, in this case because of [[pancreatic cancer]]. The bile ducts are colorless (black) in contrast to blood vessels (portal vein near center, and hepatic artery to the right of it) which have Doppler signal.
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