Computed tomography perfusion in liver and spleen for hepatitis B virus-related portal hypertension: A correlation study with hepatic venous pressure gradient

Figure 1 Computed tomography perfusion of the liver post-processing data. A: Regions of interest were placed in the abdominal aorta and main portal vein as the input blood vessels for calculation of liver computed tomography perfusion; B-D: The parameters of liver computed tomography perfusion were calculated automatically to include hepatic artery fraction (B), liver blood flow (C), and liver blood volume (D).