In the widely used [[Claude Couinaud|Couinaud]] (or "French") system of [[anatomy]] of the '''[[liver]]''', the functionalphysiological lobes are further divided into a total of eight subsegments based on a transverse plane through the bifurcation of the main portal vein.<ref name="radiopaedia.org">{{cite web|url=http://radiopaedia.org/articles/couinaud-classification |title=Couinaud classification | Radiology Reference Article |publisher=Radiopaedia.org |accessdate=2015-06-26}}</ref> The system is named after [[Claude Couinaud]].
