Liver perfusion scintigraphy prior to and after transjugular intrahepatic portosystemic shunts (TIPS) in patients with portal hypertension - Willkomm, P; Schomburg, A; Brensing, KA; Reichmann, K; Bangard, M; Overbeck, B; Sauerbruch, T; Biersack, HJ (Nuklearmedizin, 2000)