الفهرس 
Anatomical considerationsOnly 14 pages are availabe for public view
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Abstract
• Magnetic Resonance Image (MRI) has become the method of choice for evaluating the perianal fistula due to its good contrast resolution, simple, non invasive, rapid and accurate technique.
• Magnetic Resonance Image (MRI) provides precise definition of the fistulous tract,secondary extension,abscesses and the relationship of fistulous tract to the pelvic structures.. MRI provides accurate information for appropriate surgical management in order to prevent recurrence and decrease the side effects such as fecal incontinence.
• from our study,we found that T2WI is the most important sequences for detection of the fistulous tract with the good contrast between the hyper-intense fluid in the tract and the hypo-intense wall of the tract, providing good delineation of the anal sphincter. Especially the coronal plane.
• For the exact location of the primary tract we use the axial plane, the disruption of the external anal sphincter differentiate intersphincteric type from transsphincteric type. The site of internal opening also detected from this plane.
• The coronal plane depicts the levator plane thus differentiating supralevator from infralevator infection.
• A combinationofanaxialandalongitudinalseries(coronal, sagittalor radial) willprovide allthe necessarydetails.