STUDIES ON THE VALUE OF MAGNETIC RESONANCE ANGIOGRAPHY(MRA) IN IMAGING PORTAL VENOUS SYSTEM OF PORTAL HYPERTENSIVE PATIENTS

Objective : To investigate the value of MRA in imaging the portal venous system in portal hypertensive patients. Methods: Experimental group: 15 portal hypertensive patients (PHT), Control: 10. MRA protocol: Gd-DTPA 0. 2mmol/kg as contrast, 3D-FISP sequence was used to imaging portal venous system, with MIP to reconstruct vessels; PC sequence was applied to measure the portal hemodynamic parameters. Results:(1)Diameters of main portal vein (MPV 1. 58 ± 0. 17cm), splenic vein (SPV1. 28 ±0.19cm), superior mesentery vein (SMV 1.10 ± 0.19cm) and MPV/AO (0. 95 ± 0. 20cm) were larger in PHT than those of control respectively(1.10 ±0.10,0.90 ±0.10,0.80 ±0.10,0.66 ±0.10. (2)The differences of MPV,MPV/AO between Child A and B classes were not sig- nificantly different. (3) Positive imaging rates of variceal veins in PHT were high in PHT patients by MRA. (4) The differences of mean velocity and quantity of portal flow between PHT and control are not significant. Conclusion:MRA is superior to Dopple and other routine imaging procedures in imaging portal venous system of portal hypertensive patients and is significant in directing portal hypertension operation, liver transplantation and other operations.