APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Segment I is the caudate lobe and is situated posterior l. It may receive its supply from both the right and the left branches of portal vein. It contains one or more hepatic veins which drain directly into the inferior vena cava (IVC).

Detailed explanation-2: -Eight hepatic segments The four segments of left liver are: I (caudate); II (left lateral superior); III (left lateral inferior); and IV (left medial) [subdivided into superior (IVa) and inferior parts (IVb) by Bismuth].

Detailed explanation-3: -The Couinaud classification describe the functional liver anatomy (preferred over morphological liver anatomy). The middle hepatic vein also demarcates the true right and left lobes. The right lobe is further divided into an anterior and posterior segment by the right hepatic vein.