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Fig. 4B. —39-year-old man with elevated bilirubin level. 7.07 mm
indicates diameter of common bile duct. Double arrows indicate duodenum. MDCT
angiographic image derived from same MDCT data as A without changing
position of clip planes or arrows shows that hypodense filling defect seen on
MDCT cholangiography was due to gastroduodenal artery (single arrow)
superimposed on common bile duct.
