<正> Objective: To validate multi-slice three-dimensionalspiral CT cholangiography (3-D CTC) in clinical di-agnosis of biliary diseases.Methods: This study included 146 patients with bili-ary diseases, involving 73 cases of biliary tumor, 87cases of radioparent calculus, 12 cases of post cholan-gio-jejunostomy and one case of congenital choledo-chocyst. The data of thin-slice volumetric CT scanwere sent to the workstation (GE Advantage Win-dows 3. 1). Rational 3-D CTC including maximumintensity projection, minimum intensity projection,surface shaded display, CT virtual endoscopy andray sumption was performed. The diagnostic accura-cy of 3-D CTC was compared with that of conven-tional CT, ultrasonography and endoscopic retro-grade cholangiopancreaticography (ERCP).Results: Different biliary diseases showed distinct ima-ging manifestations on 3-D CTC, As a new techniquefor assessing the status of post cholangio-jejunosto-my, 3-D CTC was superior to conventional CT, ul-trasonography and ERCP in diagnosis of negative bil-iary calculus, extrahepatic cholangiocarcinoma,cancer embolus of the biliary duct, carcinoma of thepancreas head and periampullar carcinoma. It wasalso superior to conventional CT, ultrasonography orequal to ERCP in diagnosis of hilar cholangiocarcino-ma, but inferior to conventional CT and ultrasonog-raphy in diagnosis of gallbladder cancer.Conclusion: 3-D CTC as a non-invasive and sensitivetechnique for the diagnosis of biliary diseases withhigh diagnostic accuracy will greatly increase the de-tection rate of biliary diseases.
