KEY FACTS Terminology • Budd-Chiari syndrome: Hepatic venous outflow obstruction • Global or segmental obstruction of hepatic venous outflow or inferior vena cava (IVC) Imaging • Ultrasound acute phase ○…

KEY FACTS Terminology • Biliary ductal dilatation, dilated ducts Imaging • Tubular anechoic fluid-filled structures accompanying portal veins in extrahepatic and intrahepatic segments • Intrahepatic ductal dilatation ○ Dilatation of…

KEY FACTS Terminology • Chronic inflammation of gallbladder (GB) causing wall thickening and fibrosis Imaging • Presence of gallstones in nearly all cases • Diffuse symmetric GB wall thickening without…

KEY FACTS Terminology • Rare inflammatory process causing focal or diffuse destruction of gallbladder (GB) wall with accumulation of lipid-laden macrophages, fibrous tissue, and acute and chronic inflammatory cells Imaging…

KEY FACTS Terminology • Gas within portal venous system Imaging • Grayscale ultrasound ○ Highly reflective foci in portal venous system – Move along with blood ○ Poorly defined, highly…

TERMINOLOGY Abbreviations • Extrahepatic biliary structures ○ Gallbladder (GB) ○ Cystic duct (CD) ○ Right hepatic (RH) and left hepatic (LH) ducts ○ Common hepatic duct (CHD) ○ Common bile…

KEY FACTS Terminology • Definition: Obstruction of PV due to thrombosis Imaging • Absent blood flow within PV on color or spectral Doppler • Cavernous transformation of PV: Multiple portal…

KEY FACTS Imaging • Portal vein stenosis ○ Elevated portal vein velocity > 125 cm/s at anastomosis – Portal vein velocity normally < 60 cm/s ○ Anastomotic:preanastomotic velocity ratio –…

KEY FACTS Imaging • Hepatic artery stenosis ○ Elevated peak systolic velocity at anastomosis > 200-250 cm/s ○ Parvus tardus waveforms in intrahepatic arteries – Acceleration time > 0.08 s…

KEY FACTS Imaging • Ultrasound ○ Initial imaging modality for evaluation of biliary system ○ Dilated biliary duct proximal to site of anastomosis ○ Focal area of narrowing may be…