MR versus multislice CT cholangiography in evaluating patients with obstruction of the biliary tract |
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Authors: | F Zandrino P Curone L Benzi M L Ferretti F Musante |
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Institution: | (1) Department of Radiology, Azienda Ospedaliera “SS Antonio e Biagio e C. Arrigo”, Via Venezia 16, Alessandria, 15100, Italy |
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Abstract: | Background We compared magnetic resonance cholangiography (MRC) with multislice computed tomographic (MSCT) cholangiography in the assessment
of patients with bile duct obstruction.
Methods Thirty-six patients with clinical or biochemical signs of biliary obstruction were prospectively studied. MRC was performed
with fast spin-echo and single-shot fast spin-echo sequences. Source images, maximum intensity projection, and multiplanar
reconstruction were evaluated. MSCT cholangiography was performed without biliary contrast agent, with intravenous injection
of 150 mL of iodinated contrast material at 4 mL/s, 2.5-mm slice thickness, 7.5-mm/s table speed, and 1.25-mm reconstruction
interval. Axial, multiplanar, and minimum intensity projection reformatted images were evaluated. MRC and MSCT findings were
compared with endoscopic retrograde cholangiopancreatography (ERCP; 20 patients), percutaneous cholangiography (eight patients),
intraoperative cholangiography (two patients), surgery (11 patients), and cytology (11 patients) with respect to cause and
site of obstruction.
Results With regard to presence and site of obstruction, agreement was observed across MRC, MSCT cholangiography, and reference investigations
in all cases. Concerning cause, the correct diagnosis was made by MSCT cholangiography in 34 of 36 patients. Two cases of
common bile duct lithiasis, diagnosed on MRC and ERCP, were missed by MSCT cholangiography.
Conciusion MSCT cholangiography can be considered a possible noninvasive alternative to MRC. |
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Keywords: | Bile ducts computed tomography Bile ducts magnetic resonance Bile ducts stenosis or obstruction Bile ducts neoplasms Cholangiography Computed tomography comparative studies |
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