1Lim JH. Papilla of Vater. normal sonographic appearence.J Ultrasound Med, 1996,15(1):33.
2Robledo R,Muro A, Prieto ML. Extrahepatic bile duct carcinoma:US characteristics and accuracy in demonstration of tumors. Radilogy, 1996,198:869.
3Keogan MT, Seabourn JT, Paulson EK, et al. Contrast-enhanced CT of intrahepatic and hilar cholangiocacinoma: delay time for optimal imaging. AJR, 1997,169:1493.
4Fleischmann D, Ringl H, Schoffl, R, et al. Three-dimensional spiral CT cholangiography in patients with suspected obstructive biliaiy disease:comparison with endoscopic retrograde cholangiography. Radiology, 1996,198:861.
5Stockberger SM, Wass J L, Sherman S, et al. Int ravenous cholangiography with helical CT: comparison with endoscopic retrograde cholangiography. Radiology, 1994,192 : 675.
6Bret PM, Peinhold C, Taourel P, et al. Pancreas Divisum:Evaluation with MR cholangiopancreatography. Radiology, 1996,199 (1) : 99.
7Kuroriwa M,Tsukamoto Y,Naitoh Y,et al. New technique using intraductal ultrasonography for the diagnosis of bile duct cancer. J Ultrasound Med, 1994,13(3) : 189.
8Lee MG, Lee H J, Kim MH, et al. Extrahepatic biliary diseases: 3D MR cholangiopancreatography compared with endoscopic retrograde cholangiopancreatography. Radiology, 1997,202 : 663.
9Holzknecht N, Gauger J, Sackmann M, et al. Breath-hold MR cholangiography with snapshot techniques: prospective comparison with endoscopic retrograde cholangiography. Radiology, 1998,206:657.
10Guibaud L, Bret PM, Reinhold C, et al. Bile duct obstruction and choledocholithiasis: diagnosis with MR cholangiography. Radiology, 1995,197 : 109.
