Left hepatic duct formed by segmental branches from segments II-IV


• Most common variants






IMAGING
General Features
• Normal biliary anatomy
Right hepatic duct (which is typically relatively short) has 2 branches

– Anterior (ventrocranial) branch drains segments VI and VIII and has horizontal course extending lateral and towards right from right hepatic duct
• Most common variants
Most common anatomic variants involve aberrant right hepatic duct

DIFFERENTIAL DIAGNOSIS
MRCP Artifacts and Pitfalls
• Respiratory motion artifacts
• Flow artifact
Often within dilated duct (such as at point of cystic duct insertion) due to swirling or helical flow of bile

• Susceptibility artifacts
Susceptibility artifact from metallic foreign bodies (such as surgical clips, endovascular coils, stents, etc.) produces adjacent signal loss, potentially mimicking stone or filling defect within biliary tree

• Pulsatile vascular compression































