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| __NOTOC__ | | __NOTOC__ |
| {{CMG}}; {{AE}} {{FH}} | | |
| | {{CMG}}; {{AE}} {{ADS}}, {{FH}} |
| {{Cholangitis}} | | {{Cholangitis}} |
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| ==Overview== | | ==Overview== |
| [[Magnetic resonance imaging]] (MRI) has become the standard method for morphological examination of the [[bile ducts]], particularly for diagnosing cholangitis. T1-weighted and T2-weight sequences offer different results. | | There are no abnormal [[Magnetic resonance imaging|MRI]] findings associated with acute cholangitis. |
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| ==MRI== | | ==MRI== |
| Once [[magnetic resonance cholangiopancreatography]] (MRCP) has been conducted, an MRI scan can be implemented.
| | There are no abnormal [[Magnetic resonance imaging|MRI]] findings associated with acute cholangitis. [[Magnetic resonance cholangiopancreatography]] ([[MRCP]]) is used as a non-invasive tool to localize lesions within the biliary tree. |
| *The MRI machine uses radio waves and magnets to scan the internal organs and tissues.<ref name="urlPrimary Sclerosing Cholangitis">{{cite web |url=http://www.niddk.nih.gov/health-information/health-topics/liver-disease/primary-sclerosing-cholangitis/Pages/facts.aspx |title=Primary Sclerosing Cholangitis |format= |work= |accessdate=April 20 2016}}</ref>
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| ===T1-weighted sequences===
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| *T1-weighted sequences are essential in biliary disease when looking for intrahepatic [[calculi]].
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| *These sequences are recommended during 3D acquisition with fat saturation.<ref name="ArrivéRuiz2013">{{cite journal|last1=Arrivé|first1=L.|last2=Ruiz|first2=A.|last3=El Mouhadi|first3=S.|last4=Azizi|first4=L.|last5=Monnier-Cholley|first5=L.|last6=Menu|first6=Y.|title=MRI of cholangitis: Traps and tips|journal=Diagnostic and Interventional Imaging|volume=94|issue=7-8|year=2013|pages=757–770|issn=22115684|doi=10.1016/j.diii.2013.03.006}}</ref>
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| **Fat saturation offers improvements in diagnostic possibilities, especially for the [[bile ducts]] close to the [[hilum]] of the [[liver]], which is often rich in fat.
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| ===T2-weighted sequences===
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| *For examination of the [[bile duct]], T2-weighted sequences with a long echo time are generally used without fat saturation.<ref name="ArrivéRuiz2013">{{cite journal|last1=Arrivé|first1=L.|last2=Ruiz|first2=A.|last3=El Mouhadi|first3=S.|last4=Azizi|first4=L.|last5=Monnier-Cholley|first5=L.|last6=Menu|first6=Y.|title=MRI of cholangitis: Traps and tips|journal=Diagnostic and Interventional Imaging|volume=94|issue=7-8|year=2013|pages=757–770|issn=22115684|doi=10.1016/j.diii.2013.03.006}}</ref>
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| ===Limitations to MRIs===
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| *Whether T1-weighted, T2-weighted, or magnetic resonance cholangiography sequences are involved, the main limitation of bile duct MRI is its suboptimal spatial resolution.<ref name="ArrivéRuiz2013">{{cite journal|last1=Arrivé|first1=L.|last2=Ruiz|first2=A.|last3=El Mouhadi|first3=S.|last4=Azizi|first4=L.|last5=Monnier-Cholley|first5=L.|last6=Menu|first6=Y.|title=MRI of cholangitis: Traps and tips|journal=Diagnostic and Interventional Imaging|volume=94|issue=7-8|year=2013|pages=757–770|issn=22115684|doi=10.1016/j.diii.2013.03.006}}</ref>
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| **Precise examination of the distal bile ducts is still incomplete.
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| *The three main limitations resulting from MRIs fall into the following categories:<ref name="ArrivéRuiz2013">{{cite journal|last1=Arrivé|first1=L.|last2=Ruiz|first2=A.|last3=El Mouhadi|first3=S.|last4=Azizi|first4=L.|last5=Monnier-Cholley|first5=L.|last6=Menu|first6=Y.|title=MRI of cholangitis: Traps and tips|journal=Diagnostic and Interventional Imaging|volume=94|issue=7-8|year=2013|pages=757–770|issn=22115684|doi=10.1016/j.diii.2013.03.006}}</ref>
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| **Technical
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| **Anatomical
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| **Semiological
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| ([http://www.radswiki.net Images courtesy of RadsWiki])
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| <gallery>
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| Image:Recurrent_pyogenic_cholangitis_MRI_101.jpg|Recurrent pyogenic cholangitis
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| Image:Recurrent_pyogenic_cholangitis_MRI_102.jpg|Recurrent pyogenic cholangitis
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| </gallery>
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| <gallery>
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| Image:Recurrent_pyogenic_cholangitis_MRI_103.jpg|Recurrent pyogenic cholangitis
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| Image:Recurrent_pyogenic_cholangitis_MRI_104.jpg|Recurrent pyogenic cholangitis
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| </gallery>
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| <gallery>
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| Image:Recurrent_pyogenic_cholangitis_MRI_105.jpg|Recurrent pyogenic cholangitis
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| Image:Recurrent_pyogenic_cholangitis_MRI_106.jpg|Recurrent pyogenic cholangitis
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| </gallery>
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| ==References== | | ==References== |
| {{Reflist|2}} | | {{Reflist|2}} |
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| [[Category:Gastroenterology]] | | [[Category:Gastroenterology]] |
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| [[Category:FinalQCRequired]] | | [[Category:FinalQCRequired]] |
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| [[Category:Disease]] | | [[Category:Disease]] |
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| [[Category:Up-To-Date]] | | [[Category:Up-To-Date]] |
| [[Category:Infectious disease]] | | [[Category:Infectious disease]] |
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| [[Category:Surgery]] | | [[Category:Surgery]] |