The Clinical Value of 16-slice Spiral CT Angiography and Cholangiography in Biliary Obstruction Diseases

Objective To explore the clinical value of 16-slice spiral-CT angiography and cholangiography in diagnosing bile duct stenosis. Materials and Methods 16-row spiral-CT transhepatic cholangiogaphy and angiography were applied to 45 patients with bile duct stenosis. Multiple phases scanning and 3D reconstruction of hepatic artery, portal vein and bile tree were performed. The diagnosis was reached for the classification, location of the lesion and its relation with vessels. Preoperative evaluation of the resectability was done. The evaluation was compared with the results of operation and pathology. Results CTA image of 45 patients with bile duct stenosis and 43 cholangiography images were satisfactory for the diagnosis. As compared with results of operation and pathology, location diagnosis was 100% accurate. Overall diagnosis for lesion classification was 97.8% while diagnosis for malignant lesion was 100%. For 36 patients who underwent operation, the evaluation for the lesion’s relation with hepatic artery and portal vein was correct for 91.6% and 94.4% respectively. For 29 patients with malignant tumor, the predictive respectability was accurate for 88.8%. Statistic analysis showed that Kappa was 0.795, which suggested an excellent consistency between preoperational estimation and operation results. Conclusion MDCT angiography and cholangiography have value in making diagnosis for bile duct stenosis on its location, character and relation with hepatic arteries and portal vein, which provide valuable reference in estimating the resectability and establishing of operation program.