Fistula-In-Ano: Best Sequence to delineate the sphincters

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Identify the BEST MRI sequence,  that can delineate the sphincters clearly and help in identifying the type of fistula:



    Fig. 1 a / 1 b / 1c / 1d


  Case:

  47 / M

  Pus discharge from anal canal

  MRI demonstrates it to be a inter-sphincteric fistula


 Fig. 1a: T2W  TSE TRA 

 Fig. 1b: STIR TRA

 Fig. 1c: T1 W TSE Delayed -post contrast (done after the dynamic)

 Fig. 1d: 3D T1 W VIBE (gradient) - Dynamic - early phase


Check this out below




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