Estimation on hepatic volume in 13 dogs with portosystemic shunts using quantitative CT
To evaluate the effect of congenital portosystemic shunt(CPSS)on hepatic volume and the correlation between different types of CPSS and liver volume in dogs,a retrospective analysis was performed here on dogs with CPSS.Thirteen dogs with CPSS were selected and all of them underwent contrast-enhanced abdominal CT.CPSS types were accurately recorded in all dogs.Thirteen dogs without liver-related diseases and liver imaging abnormalities were randomly selected as control.The liver image was rendered on each plane of the CT multi-plan reconstruction images obtained in the delayed phase of abdominal contrast-enhanced CT.Then,the liver volume(V)was recorded through CT quantitative technology.The ratio(V/W)of hepatic volume(V)to body weight(W)of each dog was recorded,too.The results showed that the V/W ratio was(18.57±4.52)cm3/kg in the dogs with CPSS and(29.31±6.55)cm3/kg in the control group,and the difference was very significant(P<0.01).In the dogs with CPSS,the mean V/W was(23.50±5.90)cm3/kg in those with intrahepatic CPSS and(17.09±2.99)cm3/kg in those with extrahepatic CPSS,and the difference is significant(P<0.05).It was concluded that the liver of the dogs with CPSS could be evaluated by measuring their V/W value.CPSS caused a decrease in hepatic volume in dogs,and the effect of ex-trahepatic CPSS on hepatic volume was more significant than that of intrahepatic CPSS.