May 7, 2006 · The umbilic plane runs from the falciform ligament to the inferior vena cava and divides the left lobe into a medial part, which is segment IV and a lateral part formed by segment II and III.

The fissure for the round ligament of the liver (ligamentum teres) separates the medial and lateral parts of segment IV. The inferior medial segment (IVb) is also called the quadrate lobe.

According to Bismuth, the l eft medial segment of liver (segment IV) may be subdivided in two subsegments: IVa: Superior subsegment of the medial segment IVb: Inferior subsegment of the …

Jul 21, 2025 · It is the preferred anatomy classification system as it divides the liver into eight independent functional units (termed segments) rather than relying on the traditional morphological …

Mar 12, 2021 · Segment IV is subdivided into IVa and IVb, superior and inferior and is located between the left and middle hepatic veins. Segment V is inferior to the portal plane between the middle and …

Oct 30, 2023 · Segment IVa lies superiorly, while IVb lies inferiorly and corresponds with the location of the quadrate lobe. Segment V forms the inferior part of the right medial sector.

Liver segments are the caudate lobe (segment I) and each region of the liver when it is divided by the portal and hepatic veins. Segments below the portal vein from left to right are III, IVb (remember it is …

Jun 24, 2020 · The left hepatic vein divides the left lobe into lateral (II and III) and medial (IVa and IVb) segments. The middle hepatic vein divides the liver into right and left lobes.

Sep 8, 2016 · Couniaud divided liver into 8 functional segments, each of which is supplied by it’s own portal triad (composed of a portal vein, hepatic artery and a bile duct).

Apr 11, 2026 · To master Couinaud segments liver imaging, the radiologist must first establish a consistent frame of reference. The following table summarizes the primary divisions based on the …