Contrast-enhanced ultrasound for quantitative assessment of portal pressure in canine liver fibrosis

Figure 2 Time-intensity curve of normal canine hepatic parenchyma and renal cortex in the liver-kidney section. The red line represents the time-intensity curve (TIC) of the renal cortex and the yellow line represents the TIC of hepatic parenchyma. “Ta” represents the time at which renal intensity reaches the peak of the TIC. “Ia” represents the intensity at the time of Ta in the TIC of the hepatic parenchyma. Ipeak and Tpeak represent the maximum intensity of the TIC of the hepatic parenchyma and the time at which the TIC arrives at Ipeak, respectively. The area under the curve of portal venous time and the hepatic arterial time are expressed as Qp and Qa, respectively.