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© 2003 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 22:939-944 • 0278-4297

Technical Advance

Three-dimensional Sonographic Evaluation of the Common Bile Duct

Ashutosh V. Rao, MD, Julie G. Champine, MD, Thalia B. Forte, MD and Cecelia C. Brewington, MD

Department of Radiology, University of Texas Southwestern, Dallas, Texas USA.

Address correspondence and reprint requests to Ashutosh V. Rao, MD, Department of Radiology, Brigham and Women’s Hospital, 75 Francis St, Boston, MA, 02115. E-mail: araomd{at}yahoo.com.

Objective. To assess the accuracy of three-dimensional sonographic measurements of the common bile duct compared with standard two-dimensional anteroposterior measurement of the common duct. Methods. Fifty-five consecutive patients referred for abdominal sonography underwent standard two-dimensional abdominal sonography followed by three-dimensional sonographic data acquisition of the right upper quadrant. A radiologist blinded to the results of the two-dimensional examination later measured the three-dimensional long axis anteroposterior common duct diameter and three-dimensional short axis anteroposterior and transverse common duct diameters. Results. The mean average common duct diameter as measured by two-dimensional sonography (long axis anteroposterior) was 3.6 mm. The mean average common duct diameter as measured by long axis anteroposterior three-dimensional sonography was 4.1 mm. The mean average common duct diameter as measured by anteroposterior short axis three-dimensional sonography was 4.1 mm, and by transverse short axis three-dimensional sonography, it was 4.4 mm. The two-dimensional common duct measurement correlated with the long axis anteroposterior three-dimensional measurement (P < .001), the short axis anteroposterior three-dimensional measurement (P < .001), and the short axis transverse three-dimensional measurement (P < .005) by the Spearman rank order correlation coefficient test. Conclusions. Three-dimensional sonographic measurements of the common bile duct correlate highly with two-dimensional measurements, validating the use of three-dimensional sonography as a reliable method for evaluation of common bile duct size.

Key Words: bile duct, anatomy • bile ducts, sonography • sonography, comparative studies • sonography, three-dimensional

Abbreviations: AP, anteroposterior • PV, portal vein • RAO, right anterior oblique • 3D, three-dimensional • 2D, two-dimensional

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Copyright © 2003 by the American Institute of Ultrasound in Medicine.