Cholangitis MRI: Difference between revisions
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__NOTOC__ | __NOTOC__ | ||
{{CMG}} | {{CMG}} {{AE}} {{FH}} | ||
{{Cholangitis}} | {{Cholangitis}} | ||
==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. | |||
==MRI== | ==MRI== | ||
*Once [[magnetic resonance cholangiopancreatography]] (MRCP) has been conducted, a [[(MRI)]] scan can be implemented. | |||
**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> | |||
===T1-weighted sequences=== | |||
*T1-weighted sequences are essential in biliary disease when looking for [[intrahepatic calculi]]. | |||
*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> | |||
**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. | |||
===T2-weighted sequences=== | |||
*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> | |||
===Limitations to MRIs=== | |||
*Whether T1-weighted, T2-weighted or magnetic resonance cholangiography sequences are involved, the main limitation of bile duct MRI is in 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> | |||
**Precise examination of the distal bile ducts is still incomplete. | |||
*The three main limitations resulting from MRIs include those that are:<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> | |||
**Technical | |||
**Anatomical | |||
**Semiological | |||
([http://www.radswiki.net Images courtesy of RadsWiki]) | ([http://www.radswiki.net Images courtesy of RadsWiki]) | ||
Revision as of 18:38, 20 April 2016
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Farwa Haideri [2]
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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.
MRI
- Once magnetic resonance cholangiopancreatography (MRCP) has been conducted, a (MRI) scan can be implemented.
- The MRI machine uses radio waves and magnets to scan the internal organs and tissues.[1]
T1-weighted sequences
- T1-weighted sequences are essential in biliary disease when looking for intrahepatic calculi.
- These sequences are recommended during 3D acquisition with fat saturation.[2]
- 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.
T2-weighted sequences
- For examination of the bile duct, T2-weighted sequences with a long echo time are generally used, without fat saturation.[2]
Limitations to MRIs
- Whether T1-weighted, T2-weighted or magnetic resonance cholangiography sequences are involved, the main limitation of bile duct MRI is in its suboptimal spatial resolution.[2]
- Precise examination of the distal bile ducts is still incomplete.
- The three main limitations resulting from MRIs include those that are:[2]
- Technical
- Anatomical
- Semiological
-
Recurrent pyogenic cholangitis -
Recurrent pyogenic cholangitis
-
Recurrent pyogenic cholangitis -
Recurrent pyogenic cholangitis
-
Recurrent pyogenic cholangitis -
Recurrent pyogenic cholangitis
References
- ↑ "Primary Sclerosing Cholangitis". Retrieved April 20 2016. Check date values in:
|accessdate=(help) - ↑ 2.0 2.1 2.2 2.3 Arrivé, L.; Ruiz, A.; El Mouhadi, S.; Azizi, L.; Monnier-Cholley, L.; Menu, Y. (2013). "MRI of cholangitis: Traps and tips". Diagnostic and Interventional Imaging. 94 (7–8): 757–770. doi:10.1016/j.diii.2013.03.006. ISSN 2211-5684.