Hepatic perfusion parameters in chronic liver disease: Dynamic CT measurements correlated with disease severity

OBJECTIVE. The aim of our study was to determine if hepatic perfusion param eters measured with CT change in relation to disease severity in patients w ith chronic liver disease. SUBJECTS AND METHODS. Dynamic contrast-enhanced single-section CT scans of the liver were obtained in 40 individuals who included six control subjects , 16 patients with noncirrhotic chronic liver disease, and 18 patients with cirrhosis. Hepatic, aortic, and portal venous time-density curves were fit ted to a dual-input one-compartment model to calculate the liver perfusion, arterial fraction, distribution volume, and mean transit time. RESULTS. Liver perfusion decreased in patients with cirrhosis (67 +/- 23 mt min(-1) 100 mL(-1) versus 108 +/- 34 mL . min(-1) . 100 mL(-1) in control subjects [p = 0.009] and 98 +/- 36 mt min(-1) . 100 mL(-1) in patients with noncirrhotic chronic liver disease [p = 0.003]), and the arterial fraction and the mean transit time increased (41 +/- 27% and 51 +/- 79 sec versus 1 7 +/- 16% and 16 +/- 5 sec in control subjects, and 19 +/- 6% and 17 +/- 8 sec in patients with noncirrhotic chronic liver disease [p < 0.05]). A sign ificant correlation was seen between these three perfusion parameters and t he severity of chronic liver disease based on clinical and biologic data (p < 0.001). No significant change in distribution volume was observed. CONCLUSION. Hepatic perfusion parameters measured with CT were significantl y altered in cirrhosis and correlated with the severity of chronic liver di sease.