Guibaud L, Bret PM, Reinhold C, Atri M, Barkun AN. Bile duct obstruction and choledocholithiasis: diagnosis with MR cholangiography. Radiology 1995 Oct;197(1):109-15
Department of Diagnostic Radiology, Montreal General Hospital, McGill University, Quebec, Canada.
PURPOSE: To evaluate
the accuracy of magnetic resonance (MR) cholangiopancreatography
in the diagnosis of bile duct obstruction. MATERIALS AND METHODS:
One hundred twenty-six patients with clinically suspected bile
duct obstruction underwent MR cholangiopancreatography with heavily
T2-weighted fast spin-echo sequences. Reviewers were blinded to
clinical and imaging findings. RESULTS: Seventy-nine patients
had biliary obstruction that was diagnosed with MR cholangiopancreatography
in 72 patients for a sensitivity of 91%, specificity of 100%,
and overall accuracy of 94%. Thirty-two patients had choledocholithiasis
that was diagnosed with MR cholangiopancreatography in 26 patients
for an accuracy of 94%, sensitivity of 81%, specificity of 98%,
positive predictive value of 93%, and negative predictive value
of 94%. Fourteen patients had malignant obstruction that was diagnosed
with MR cholangiopancreatography in 12 patients for a sensitivity
and a positive predictive value of 86%, specificity and negative
predictive value of 98%, and accuracy of 97%. CONCLUSION: MR cholangiopancreatography
is a noninvasive technique with excellent accuracy in the diagnosis
of bile duct obstruction and its causes.
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