Diffusion-weighted MRI: Role in detecting abdominopelvic internal fistulas and sinus tracts
| Autor: | Aytekin Oto, Garima Agrawal, Christine Schmid-Tannwald, Ila Sethi, Farid Dahi |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Fistula Contrast Media Sensitivity and Specificity Abdomen Intestinal Fistula medicine Humans Radiology Nuclear Medicine and imaging Confidence score Aged Retrospective Studies Aged 80 and over Observer Variation medicine.diagnostic_test business.industry Significant difference Reproducibility of Results Magnetic resonance imaging Sinus tracts Middle Aged Magnetic Resonance Imaging Diffusion Magnetic Resonance Imaging Female Radiology Detection rate Observer variation business Diffusion MRI |
| Zdroj: | Journal of Magnetic Resonance Imaging. 35:125-131 |
| ISSN: | 1053-1807 |
| DOI: | 10.1002/jmri.22804 |
| Popis: | Purpose: To retrospectively determine the incremental value of diffusion-weighted MR-imaging (DW-MRI) to T2-weighted (T2w) images in diagnosis of internal fistulas (IFs) and sinus tracts (STs). Materials and Methods: Fourteen patients with 25 IFs and STs arising from the small bowel (20), colon (4) and biliary tract (1) were included. Two independent observers reviewed T2w images, T2w+DW-MRI images and T2w+contrast enhanced T1-weighted (CE T1w) images at three sessions to detect IF/ST based on a confidence scale of five. Sensitivity and confidence score of each session was compared. Results: 10/25 (40%) and 9/25 (36%) IFs and STs were detected on T2w images by observer 1 and 2, respectively. Both observers detected 19/25 (76%) and 24/25(96%) IFs and STs on T2w+DW-MRI and T2w+CE T1w images, respectively. Detection rate and confidence score improved significantly by combining T2w images with DW-MRI or CE T1w images (reader 1 + 2: P ≤ 0.01). There was no significant difference between the IF/ST detection rate of T2w+DW-MRI and T2w+CE T1 image combinations. Confidence scores with T2w+CE T1w images were significantly greater than DW-MRI+T2w images (reader 1:P = 0.01; reader 2: P = 0.03). Conclusion: DW-MRI showed additional value to T2w imaging for diagnosis of IF and ST. DW-MRI can be a useful adjunct, especially for patients with renal failure. J. Magn. Reson. Imaging 2012;35:125-131. © 2011 Wiley Periodicals, Inc. |
| Databáze: | OpenAIRE |
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