Category Ultrasonography

Gallbladder Adenomyomatosis

KEY FACTS Imaging Gallbladder (GB) wall thickening with intramural hyperechoic foci and comet-tail reverberation artifacts V-shaped comet-tail artifacts from debris in GB wall cystic spaces Twinkling artifacts from intramural debris on color Doppler examination Morphological patterns: Diffuse, segmental, annular, focal…

Echogenic Bile

KEY FACTS Imaging Amorphous, mid-/high-level echoes within gallbladder or bile ducts Free floating or mass-like, mobile, settling in dependent position Floating punctate echoes may show ring-down artifact Occasionally round, low to intermediate echogenicity and mass-like: "Tumefactive" sludge No posterior acoustic…

Cholelithiasis

KEY FACTS Imaging Highly reflective, mobile and gravity-dependent intraluminal structures with posterior clean shadowing Variable size; stones < 5 mm may not shadow Contracted gallbladder (GB) full of stones may not exhibit mobility and may be mistaken for duodenal bulb…

Biliary System

TERMINOLOGY Abbreviations Extrahepatic biliary structures Gallbladder (GB) Cystic duct (CD) Right hepatic (RH) and left hepatic (LH) ducts Common hepatic duct (CHD) Common bile duct (CBD) Definitions Proximal/distal biliary tree (follows direction of flow) Proximal refers to portion of biliary…