الفهرس 
Anatomy of The Biliary Ductal SystemOnly 14 pages are availabe for public view
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Abstract
Evaluation of hepatobiliary lesions is a common radiologic problem. It requires a multimodality imaging approach (81, 82).
MRCP is the only modality that allows imaging of the biliary and pancreatic ducts in their basal state, as extrinsic contrast agents are not used. This is by using heavily T2-weighted sequences; the signal of static or slow-moving fluid-filled structures such as the bile and pancreatic ducts is greatly increased, resulting in increased duct- to-background contrast (84).
The present study included 30 patients with already known or suspected hepatobiliary diseases aiming to evaluate the role of MRCP in diagnosis of hepatobiliary lesions.
We examined all cases using two MRCP techniques: breath- hold 2D single shot MRCP (single slice technique) and respiratory- triggered 3D MRCP with MIP reconstruction.
Eight patients were diagnosed as congenital biliary disorders whether choledochal cysts, biliary atresia or both. MRCP helped us to define the Todani type of the choledochal cysts, namely IB, IC, III, IVA & V types.
Calcular biliary diseases represented a large category in our study. We studied 9 patients suspected to have CBD and gallbladder stones. MRCP detected the site of the stones and able to mark its level.
MRI successfully diagnosed multiple hepatic abscesses. The confirmatory studies of the MRCP diagnosis were ERCP, surgery and histopathology. The MRCP diagnosis was found to be highly consistent with the final diagnosis with an overall 92.5% sensitivity and 100% specificity and 93.3 % diagnostic accuracy.
Finally, we concluded that MRCP was highly accurate in
Summary and Conclusion
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detecting the presence and defining the level of biliary obstruction. It allowed non-invasive, safe and effective method for assessing living liver donors and post-operative alterations of the biliary tract.
MRCP doesn’t involve the use of ionizing radiation which is suitable for children. Thus, we recommend that MRCP should be a standard diagnostic procedure in the future.