Endoanal coil in MR imaging of anal fistulas.

Stoker, J.; Hussain, Shahid; Kempen, D. Van; Elevelt, Aaldert; Laméris, Johan S.

doi:10.2214/ajr.166.2.8553948

Cited by 69 publications

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“…However, disagreement was usually clinically insignificant, mostly reflecting imprecise localization of the height of the internal opening, which occurs because the dentate line is not discernable on MRI, even when using endoanal coils with improved spatial resolution 18 .…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance imaging for primary fistula in ano

Buchanan

Halligan

Williams

et al. 2003

British Journal of Surgery

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Section: Discussionmentioning

confidence: 99%

Magnetic resonance imaging for primary fistula in ano

Buchanan

Halligan

Williams

et al. 2003

British Journal of Surgery

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“…In our experience, proton-density-weighted gradient-echo (GRE) and T2-weighted turbo spin-echo MR imaging give optimal results without contrast enhancement. Proton-density-weighted and T2-weighted MR imaging sequences clearly demonstrate normal anal anatomy and anal disease (1,3,5,8) and are, therefore, the mainstays of our imaging protocols for endoluminal MR imaging of the rectum and anus. In patients with fecal incontinence, detailed demonstration of the anal sphincter anatomy is essential.…”

Section: Stoker Et Al S S S S S Radiographics S S S S S 385mentioning

confidence: 99%

“…Recent studies have demonstrated that MR imaging is the preferred modality in perianal fistulas. Endoanal MR imaging is superior to endoanal sonography and body-coil MR imaging (3,5). Tracts can be identified with T2-weighted sequences, fat suppression techniques, or contrast-enhanced T1-weighted sequences.…”

Section: Stoker Et Almentioning

confidence: 99%

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Endoluminal MR Imaging of the Rectum and Anus: Technique, Applications, and Pitfalls

Stoker

Rociu²,

Aw³

et al. 1999

RadioGraphics

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Anorectal diseases (eg, fecal incontinence, perianal and anovaginal fistulas, anorectal tumors) require imaging for proper case management. Endoluminal magnetic resonance (MR) imaging has become an important part of diagnostic work-up in such cases. Optimal endoluminal MR imaging requires careful attention to patient preparation, imaging protocols, and potential pitfalls in interpretation. Comfortable positioning and the use of an antiperistaltic drug are vital for adequate patient preparation. Selected sequences and imaging planes are used in imaging protocols tailored for specific diseases. In fecal incontinence, three-dimensional sequences allow detailed demonstration of the anal anatomy and related defects. In perianal and anovaginal fistulas, longitudinal imaging planes help determine the superior extent of the abnormality. In anorectal tumors, T1-weighted turbo spin-echo MR imaging can help detect extension into the perirectal fat and T2-weighted turbo spin-echo MR imaging is used to optimize contrast between tumor and the rectal wall. Off-axis and radial imaging planes are used in all anorectal diseases to minimize partial volume effects. Potential pitfalls include various parts of the normal anal anatomy mimicking sphincter defects, veins and hemorrhoids mimicking fistulas and abscesses, and overhanging tumor mimicking more extensive tumor. Adequate patient preparation combined with proper technique and a knowledge of potential pitfalls will allow optimal endoluminal MR imaging of the rectum and anus. MR, 757.121411, 757.121413 • Rectum, neoplasms, 757.30 RadioGraphics 1999; 19:383-398 1 From the Departments of Radiology (J.S., E.R., A.W.Z., J.S.L.) and Surgery (W.R.S.), University Hospital Rotterdam Dijkzigt, Erasmus University Rotterdam, the Netherlands, and the Department of Radiology, Academic Medical Center, P.O. Box 22700, 1100 DE Amsterdam, the Netherlands (J.S., J.S.L.). Recipient of a Certificate of Merit award for a scientific exhibit at the 1997 RSNA scientific assembly.

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“…Endoluminal anal coils offer higher spatial resolution than body coils [32], and their use resulted in an initial increased accuracy of classification of the primary track to up to 93% [33,34]. However, examinations performed using endoanal coils alone are limited by field of view and by patient discomfort, a result of which is often suboptimal image quality due to patient motion [35].…”

Section: Mr Imaging Techniquesmentioning

confidence: 99%

MRI of Crohn?s Anoperineal Disease

McDermott¹

2013

J Gastrointest Dig Syst

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Anoperineal involvement is seen in up to 38% of patients with Crohn's disease. To adopt the best treatment strategy and avoid recurrences, it is important to obtain precise radiological information of the fistulous track. Magnetic resonance imaging provides precise information on the anatomy of the anal canal, the anal sphincteric complex, and the relationship of the fistula to the pelvic floor structures. In this article we review the anatomy of the anal canal, the pathogenesis of perianal fistula, different MRI sequences for the evaluation of fistula with emphasis on their imaging findings and an MR imaging based grading system for their classification.

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Endoanal coil in MR imaging of anal fistulas.

Cited by 69 publications

References 0 publications

Magnetic resonance imaging for primary fistula in ano

Magnetic resonance imaging for primary fistula in ano

Endoluminal MR Imaging of the Rectum and Anus: Technique, Applications, and Pitfalls

MRI of Crohn?s Anoperineal Disease

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