Measurement of human hepatic and splenic perfusion using dynamic computed tomography: a preliminary report.

The purpose of the study was evaluate hepatic (portal and arterial) and splenic perfusion at parenchymal level using dynamic computed tomography (CT) in patients with diffuse liver disease and controls. Nineteen patients and 30 normal controls underwent dynamic CT of the liver. Single-location dynamic sequences were carried out after intravenous administration of a 40 ml bolus of contrast medium (Ioversol: 5 cc/s). Hepatic arterial perfusion, hepatic portal perfusion and splenic perfusion were calculated from time-attenuation curves. Hepatic portal perfusion was significantly lower in patients (0.63 +/- 0.33 ml/min/ml (mean +/- SD); P = 0.003) compared with that in controls (1.03 +/- 0.43), although hepatic arterial perfusion did not differ (0.090 +/- 0.044 versus 0.102 +/- 0.114). Splenic arterial perfusion was significantly lower in patients (0.92 +/- 0.31; P = 0.0009) than in controls (1.35 +/- 0.44). The decreased hepatic portal perfusion in patients with diffuse liver disease was not supplemented by an increase in hepatic arterial perfusion. The decreased splenic perfusion in patients may be due to increased portal pressure. Dynamic CT enables quantification of hepatic and splenic perfusion.