Stepwise evaluation of liver sectors and liver segments by endoscopic ultrasound

Table 2 The home bases of imaging for liver segments

Home bases	Defining of segments
Hepatic veins	LHV separates II and III from IV (a and b)
	MHV separates IVa from VIII and IVb from V
	RHV separates V from VI and VIII from VII
Portal vein and its branches	Superior segments lie above and inferior segments lie below the transverse fissure
	The LPV supplies segments II to IV
	The RPV supplies segments V to VIII
IVC	IVC passes through the bare area of the liver and is related to superior segments in the upper part, segment I for most of its course, and with segment VI close to the lower most part above the right kidney
IVC suprahepatic part	A transverse plane defines the upper limit of superior segments (II, IV, VIII, and VII)
Ligamentum teres	Separates segment III from IVb
Ligamentum venosum	Separates I from IVa and II
Gallbladder	Neck lies close to segment V and fundus close to segment VI, from stomach IVb comes between the gallbladder and probe

IVC: Inferior vena cava; LHV: Left hepatic vein; MHV: Middle hepatic vein; RHV: Right hepatic vein; LPV: Left branch of the portal vein; RPV: Right branch of the portal vein.