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[Evaluation of a new MRI cholangiography sequence with a half-Fourier acquisition technic]
C Aubé1, J M Godoy, E Vuillemin
1Service de Radiologie, CHU d'Angers.
Purpose:
The aim of this study was to evaluate a new MR cholangiography sequence in which thick slices are obtained with half Fourier acquisition (SSFSE) in biliary obstructive diseases.
Patients And Methods:
Fifty patients with suspected bile duct obstruction were prospectively investigated with MR cholangiography using SSFSE sequence with thick slices. The gold standard was ERCP (n = 40), percutaneous cholangiography (n = 1) or surgical findings (n = 9). According to this gold standard, 17 patients had bile duct lithiasis and 21 had neoplastic obstruction.
Results:
The sensitivity and specificity of MR cholangiography were 100% and 94% for the diagnosis of lithiasis obstruction and 95% and 97% for neoplastic obstruction. Agreement between the MR cholangiogram and the gold standard was good whatever the site of obstruction (range of kappa values: 0.79-1).
Conclusion:
MR cholangiography with SSFSE sequence is a useful, precise and easy to use technique. Acquisition time for thick slices is short (< 2 sec) limiting cardiorespiratory artefacts and eliminating the need for post-treatment.