Fistula in Ano: Evaluation with Low-Field Magnetic Resonance Imaging (0.1 T)

Madsen, Søren; Myschetzky, Peter Sand; Heldmann, U.; Rasmussen, Ole F.; Thomsen, Henrik S.

doi:10.1080/003655299750024797

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Cited by 11 publications

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2006

Benign Anorectal Diseases

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Magnetic resonance imaging with rectal Gd-DTPA: new tool for the diagnosis of perianal fistula

Sabir

Sungurtekin

Erdem

et al. 2000

International Journal of Colorectal Disease

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This study investigated the effectiveness of magnetic resonance imaging (MRI) with rectal administration of the enteral contrast agent gadolinium diethylene triamine pentaacetic acid (Gd-DTPA) in the diagnosis of recurrent perianal fistulae, assessing the number, anatomical extent, location, and signal intensities of various lesions. Fistulas were examined by MRI before and after rectal administration of Gd-DTPA in 50 patients (excluding fistulas due to inflammatory bowel disease). Surgical findings were compared with both pre- and postcontrast T1-weighted, T2-weighted, and short T1 inversion recovery (STIR) sequences. Of the 68 fistulous tracts detected surgically, precontrast imaging identified 16 by T1-weighted images (hypointense), 27 by T2-weighted images (hyperintense or iso- to weakly hyperintense), and 54 by STIR. Postcontrast imaging identified 29 by T1-weighted images, 58 by T2-weighted, and 54 by STIR. MRI with rectal administration of Gd-DTPA thus facilitates determination of fistula tracts, which are better resolved by precontrast STIR than by either precontrast T1- or T2-weighted images. Postcontrast T2-weighted images were substantially superior to T1-weighted. Both noncontrast STIR and postcontrast T2-weighted sequences were adequate for classifying fistulas in ano, but in complex recurrent anal fistula postcontrast T2-weighted images were more helpful.

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Fistula in Ano: Evaluation with Low-Field Magnetic Resonance Imaging (0.1 T)

Abstract: The use of low-field MRI of the pelvic region in the investigation of suspected perianal fistulae is a feasible, reliable, and painless examination. MRI should be considered in patients with suspected complex anal fistulae. Future prospective studies are warranted.

Cited by 11 publications

References 9 publications

Colon and Rectum

Colon and Rectum

Imaging Perianal Sepsis: Anal Endosonography or MR Imaging?

Magnetic resonance imaging with rectal Gd-DTPA: new tool for the diagnosis of perianal fistula

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