Background rnHepatic Artery,rnon the basis of intrahepatic branching patterns of blood supply and biliaryrndrainage, liver creates 8 segmentations: anterior and posterior segments in right lobe, whereasrnmedial and lateral segments in left lobe. Each segment is again subdivided into upper and lowerrnsegmentsrn1rn. The usual arterial supply of liver is common hepatic artery arising from celiac trunk,rnaccounting for 25-75% of cases. The patterns of arterial supply are not constant. In variantrnpatterns, it receives arterial flow through branches coming from superior mesenteric artery, leftrngastric artery, or, rarely from other arterial trunksrn2rn.rnPortal vein, the normal anatomy of portal vein is defined as a division of main portal vein intorntwo branches left portal vein and right portal vein. Left portal vein supplying segments I, II, IIIrnand IV. The right portal vein is dividing secondarily into two branches- right medial (anterior)rnsectoral division supplying segments V & VIII and right lateral (posterior) sectoral divisionrnsupplying segments VI & VII.rn1rnVariations are frequent and they account for 20-35% of thernpopulation.rnObjective: This study is designed to evaluate the patterns of variation in hepatic vasculature onrnpatients presented to radiology department and had computed tomography of the abdomen atrntikuranbesa specialized hospital.rnMethod:Hospital based retrospectivecross-sectional study was conducted on 878 patients whornunderwent an abdominal CT at TASH andpatterns of variation in hepatic vasculature wasrnevaluated in a period of 3 months from June 2018 to September.2018.rnData was collected by evaluating abdominal CT scans from PACS (Medweb). The data wasrnchecked for clarity and completeness. Computerized data analysis was conducted by using SPSSrnversion 20.0 softwarernResult: Total of 878 (N = 878) patients were included in the study out of which 537 patients hadrna post contrast CT and 341 patients had a triphasic scan rnHepatic arterial anatomy was evaluated in those patients who had a triphasic abdominal CT, outrnof which 299 (87.7%) had a normal classic anatomy and 42(13.3%) cases had a variant anatomy.rnVIIrnNormal Portal vein anatomy was seen in 717 patients (79.94%) out of 878 patients. Trifurcationrn(Type I) variation was seen in 77 (8.8%) of the cases. Right posterior vein as first branch ofrnMPV (Type II) variation was seen in 66 (7.5%) of the cases. Type III variation seen in 14 (1.6%)rncases, type IV seen in 1 (0.1%) case and 3 cases had other types of variation which are notrnincluded in the variant, in which 2 patients had an absent Left Portal vein and 1 case had arndivision of the main portal vein into segment VI, segment VII, right anterior portal vein, and leftrnportal vein as a â€œquadfurcationâ€.