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Fig. 1 | Insights into Imaging

Fig. 1

From: Automated segmentation of liver segment on portal venous phase MR images using a 3D convolutional neural network

Fig. 1

Method of Couinaud’s classification on axial MRI images. Five planes (three vertical planes along the main stem of hepatic veins and two horizontal planes through the primary branches of the portal vein) are used to divide the liver. In axial MR images, the line from the midpoint of the IVC to the MHV or vertex of the gallbladder fossa divides the right and left lobes (a and b). The RHV further divides the right lobe into anterior and posterior segments (d and e). The LHV (in the upper part of the liver) and the left longitudinal fissure (in the lower part of the liver) divide the left lobe into a medial and a lateral segment. (g and h). Each segment of right and left lateral lobes is further divided into a superior segment and an inferior segment by the main stem of the right portal vein and the sagittal part of the left portal vein (f and i). The caudate lobe is separated from the other segments by the natural curve from the venous ligament fissure to the right wall of the IVC (c). IVC, inferior vena cava; MHV, middle hepatic vein; RHV, right hepatic vein; LHV, left hepatic vein.

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