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Fig. 2 —Fluoroscopy image shows centering balloon catheter introduced into transjugular intrahepatic portosystemic shunt. Length of every balloon segment is 1 cm. Lowermost balloon segment (white arrow) is in portal vein about 1 cm from entry of stent into punctured portal vein branch. Sixth balloon segment (black arrow) is in inferior vena cava; thus, irradiation route should have length of 6 cm.