Imaging Techniques

  • Paolo Pavone
  • Roberto Passariello

Abstract

Several imaging techniques, both invasive and noninvasive, are commonly used for evaluating biliopancreatic ducts: intravenous cholangiography, ultrasound, computed tomography (CT), magnetic resonance (MR), percutaneous transhepatic cholangiography (PTC) and endoscopic retrograde cholangiopancreatography (ERCP). Intravenous cholangiography is limited by the major drawback, namely the lack of opacification of the biliary system, which occurs in 30%–40% of cases. Moreover, in a prospective study intravenous cholangiography was useful in detecting choledocholithiasis only in 1.5% of cases [1, 2]. Risks related to adverse reaction of contrast agent, the cost of the procedure, and the poor anatomical definition of the intra- and extrahepatic bile ducts should be considered if a cost-effectiveness analysis is performed [3]. Ultrasound, CT, and conventional MR are currently used in the initial evaluation of patients with symptoms and signs related to the pancreaticobiliary system. The diagnostic accuracy varies with the various pathologies, but each of the previous techniques, offering an indirect representation of the biliary ducts, is often insufficient to provide a correct diagnosis and basis for treatment of the biliary obstruction [4–6].

Keywords

Respiration Pancreatitis Expense Glucagon Ghost 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Paolo Pavone
    • 1
  • Roberto Passariello
    • 1
  1. 1.Istituto di Radiologia, Cattedra IIUniversità degli Studi di Roma “La Sapienza”RomeItaly

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