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Magnetic resonnance cholangiography (MRC): comparaison of two and three - dimensional sequences for assessment of biliary anomalies. A.Daghfous *, F. AbidI *, K. Bouzaid **, M. Maarouf *, L. Rezgui Marhoul *.
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Magneticresonnancecholangiography (MRC): comparaison of two and three-dimensionalsequences for assessment of biliary anomalies
A.Daghfous*, F. AbidI*, K. Bouzaid**, M. Maarouf*, L. RezguiMarhoul*
Radiology services in Trauma Center*, Tunisia and TaherMaamouri’shospital**, Nabeul
modality because of its ability to provide 3D views of the
patient's anatomy. It also does not have many of the
inherent shortcomings of two-dimensional (2D) imaging.
The purposewas to retrospectively compare two-dimensional (2D) magneticresonnance cholangiography (MRC) includingbreath-hold single-shotrapid acquisition with relaxation enhancement (RARE) and multislicehalf-fourrier RARE versus 3D-RARE MRC in the evaluation of biliary anomalies.
Cholangio-MRI: 2D (A and B) and 3D séquences (Cet D)
Choledolithiasis ( ) and galdbladdercalculi ( )
Dilatation of intra hepatic bile ductsecondary to hilarcholangiocarcinoma ( )
without dilatation of the wirsung ( ) and the main bile duct ( )
Cystic dilatation of pancreaticducts( ) relevant to TIPMP
Hilarcholangiocarcinoma ( )
MR cholangiography demonstrates dilatation of intra hepatic bile ducts( )
Withoutvisualization of the main bile duct
MRC demonstratescystic dilatation of main bile duct and intra hepaticducts relevant to Carolidisease
MRC demonstrates dilatation of main bile duct and intra hepaticductssecondary to ampullomavaterien ( )
*In our study, 2D-MRC and 3D-MRC showed Similar diagnostic
accuracy in patients with biliary diseases. Although 3D-MRC
had the tendency to show higher accuracy compared with 2D
MRC: it did display superior image quality and ductal
conspicuity compared with 2DMRC.
*Magneticresonnance (MR) cholangiography has emerged as
an accurate, non invasive alternative to diagnostic endoscopic
retrogradecholangiography (ERC) in the evaluation of disease of
the biliary tract.
* Two-dimensionalthick-section single-shotRARE and multislice
thin-section half-Fourier RARE techniques are the most
commonly used techniques for MRC. The 2D thick-section
technique has the major advantage of allowing a quick
acquisition of an image giving an overview of the ductal
* The limitation of the thick-section technique, however,
is the lack of postprocessing, preventing the evaluation of
individual tomographic sections. Therefore, thick-section
technique alone is not suitable for the evaluation of
complex anatomical structures like the hepatic hilum.
of thicksection imaging to provide an anatomical overview
and thin-section imaging to provide finer detail.
* The major advantage of 3D-MRC is that it provides isotropic
MIP images without distortion allowing its usage as a
complementary sequence tostandard 2D-MRC in the
evaluation of the biliary tree.
* Three-dimensional acquisition is appealing for MRC because it provides contiguous thin sections (approximately1 mm in all three dimensions) that may be used to reconstruct images in any plane.
the quality of MIP reconstruction using a variety of software to
* 3D-MRC has a higher technical and overall image quality
than 2D-MRC,there is still a limitation in improving the
diagnostic performance for evaluating all biliary diseases.
Nevertheless, high quality MIP reconstructions are very
useful because they improve theunderstanding of complex
anatomical structures such as the hepatic hilum by
selecting the optimal viewing angle.
* Two major disadvantages of 3D-MRC are its long acquisition
time and high level of background suppression which lead to
low anatomical information regarding underlyingparenchymal