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a–c Expected CT findings 48 h after uncomplicated open cholecystectomy, including minimal residual intraperitoneal air (* in a), drainage tube (thick arrows) in place and minimal fluid (arrowheads) in the operated gallbladder fossa adjacent to surgical clips. d–f Expected CT appearance shortly after laparoscopic cholecystectomy, with minimal fluid in the surgical bed (arrowhead); visualisation of metallic clips at the cystic duct and artery is improved by using bone window settings (f)
