| Diffusion-weighted MRI: a new tool for the diagnosis of fistula in ano. | |
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MedLine Citation:
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PMID: 19856434 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To retrospectively determine the additional value of diffusion-weighted magnetic resonance imaging (MRI) to T2-weighted imaging in the evaluation of anal fistulae in comparison with gadolinium (Gd)-enhanced imaging. MATERIALS AND METHODS: Thirteen patients (mean age, 35.2 years) with 20 anal fistulae were included. The protocol consisted of fat-suppressed T2-weighted fast spin-echo, diffusion-weighted single-shot echo-planar (b factors 0 and 800 s/mm(2)), and fat-suppressed Gd-enhanced T1-weighted gradient echo sequences. Two radiologists evaluated images in consensus. RESULTS: Eighteen (90%) fistulae were detected on T2-weighted images, and 19 (95%) and 19 (95%) were detected on diffusion-weighted and T2-weighted images combined and on Gd-enhanced and T2-weighted images combined, respectively. There was no statistically significant difference in sensitivity of the techniques (P > 0.5 for all comparison pairs). Confidence scores with diffusion-weighted and T2-weighted images combined or those with Gd-enhanced and T2-weighted images combined were significantly greater than those with T2-weighted images alone (P = 0.0047 and 0.014, respectively). CONCLUSION: Diffusion-weighted MRI of anal fistulae is a useful sequence and can be a helpful adjunct to T2-weighted imaging, especially in patients with risk factors for contrast agents. |
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Authors:
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Masatoshi Hori; Aytekin Oto; Sarah Orrin; Kenji Suzuki; Richard L Baron |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 30 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-10-29 Completed Date: 2010-01-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 1021-6 Citation Subset: IM |
Affiliation:
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Department of Radiology, University of Chicago, Chicago, Illinois 60637, USA. mhori@radiol.med.osaka-u.ac.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Contrast Media / pharmacology* Crohn Disease / diagnosis*, pathology Diffusion Magnetic Resonance Imaging / methods* Female Humans Image Enhancement / methods Magnetic Resonance Imaging / methods* Male Middle Aged Radiology / methods* Rectal Fistula / diagnosis*, pathology Reproducibility of Results Research Design Retrospective Studies |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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