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Figure 2: (a) Coronal venous phase of maximum-intensity-projection images showing the formation of the main portal vein (horizontal arrow facing left) at porta by the confluence of splenic vein (vertical arrow pointing down) and superior mesenteric vein (vertical arrow pointing upwards). (b) Normal caliber right branch of the portal vein (horizontal arrow pointing right) and the attenuated left portal vein (horizontal arrow pointing left). (c) Venous phase axial computed tomography image showing disorganized intrahepatic portal vein branches (arrows). (d) Arterial phase axial computed tomography image showing the transient hepatic attenuation difference phenomenon, observed as an area of enhancement in the left lobe of the liver (encircled) with early opacification of the left portal vein suggesting arterioportal shunt

Figure 2: (a) Coronal venous phase of maximum-intensity-projection images showing the formation of the main portal vein (horizontal arrow facing left) at porta by the confluence of splenic vein (vertical arrow pointing down) and superior mesenteric vein (vertical arrow pointing upwards). (b) Normal caliber right branch of the portal vein (horizontal arrow pointing right) and the attenuated left portal vein (horizontal arrow pointing left). (c) Venous phase axial computed tomography image showing disorganized intrahepatic portal vein branches (arrows). (d) Arterial phase axial computed tomography image showing the transient hepatic attenuation difference phenomenon, observed as an area of enhancement in the left lobe of the liver (encircled) with early opacification of the left portal vein suggesting arterioportal shunt