caudate lobe การใช้

• It joins nearly at right angles with the left sagittal fossa, and separates the caudate lobe and process behind.
• These separate the right lobe in two smaller lobes on its left posterior part : the quadrate lobe and the caudate lobe.
• It is located close to the right of the fossa between the bare area and the caudate lobe and immediately above the renal impression.
• The lower group of from six to twenty smaller hepatic veins come from the right lobe and the caudate lobe, are in contact with the hepatic tissue, and are valveless.
• The sign is similar in mechanism but distinct in significance from the " hot caudate sign ", in which the caudate lobe of the liver shows preferential enhancement or radiotracer accumulation with hepatic vein occlusion in Budd Chiari syndrome.
• An important anatomical landmark, the porta hepatis, also known as the " transverse fissure of the liver ", divides this left portion into four segments, which can be numbered starting at the caudate lobe as I in an anticlockwise manner.
• Along the inferior aspect of the right lobe it projects exophytically from the hepatic surface . It extends up to the hepatic capsule as well . The arterial phase demonstrates evidence of mild tortuosity of right hepatic artery . Marginal dilatation is also seen of the same vessel . Lobular surface of the liver is observed, especially of the right lobe . There is evidence of thrombosis of the right portal vein . The thrombosis extends into the proximal portion of the left portal vein as well . partial thromobosis of the main portal vein is also seen . The superior mesentric vein is normal, the splenic vein is also normal . In the segment IV of the lever there is a subtle 1.0 to 1.4 cm hypoattenuated lesion, which is best appreciated in the portal venous phase and in the delayed phase . In arterial phase of the evalution, this lesion is marginally hypoattenuated to hepatic parenchyma . The caudate lobe is normal.