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. 2018 Jul 10;13(7):e0199611. doi: 10.1371/journal.pone.0199611

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© 2018 Obmann et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 3 — In normal anatomy, the first bifurcation of the right portal vein (RPV) is used for the caudate-right-lobe ratio (CRL-R) calculation A), while anatomic variants are shown on the right side of the figure. B-E) In cases of an anomalous origin of the left portal vein (LPV), the first bifurcation of the RPV is used as in the normal variant, illustrated in B) and D). In the case of an early origin of the right posterior branch, the first bifurcation of the right anterior branch is measured C). In the case of an origin of the right anterior branch from the LPV, the first bifurcation of the right posterior branch is measured E). RPV = right portal vein; CRL-R = caudate-right-lobe-ratio; LPV = left portal vein.