Hepatic arteries and the parallel-channel sign.

J Clin Ultrasound, 1979/4;7(2):125-7.

Willi UV, Teele RL

PMID: 108309

Impact factor: 0.869

Abstract
The sonographic parallel-channel sign is not pathognomonic of dilatation of the biliary tree. Often, the so-called parallel channel is a hepatic artery. The differentiation between a bile duct and a hepatic artery is usually possible with good sonographic technique.
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