Characterization of a dedicated double loop,endoluminal coil for anal sphincter MR imaging at 1.5 T and 3 T |
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| Authors: | J‐M Verret F Pilleul C Rabrait E Malher S Piranda J‐F Delforge H Saint‐James O Beuf |
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| Affiliation: | 1. Université de Lyon, CREATIS;2. CNRS UMR5220, Inserm U1044, INSA‐Lyon, Université Lyon 1, France;3. General Electric Healthcare, Clinical Science Development Group, Buc, France;4. Hospices Civils de Lyon, Département d'imagerie digestive, Lyon, France;5. Centre Léon Bérard–Centre de Lutte contre le Cancer, Lyon, France;6. MS Techniques, Applications des Plastiques Avancés, Pompey, France;7. Statice Santé, Dispositifs Médicaux, Besan?on, France;8. Alcis, Fabrication de matériel médico chirurgical, Besan?on, France;9. Université Rennes 1, LTSI Laboratoire Traitement du Signal et de l'Image, Inserm U1099, Rennes, France;10. CRLCC, Centre régional de lutte contre le cancer Eugène Marquis, Rennes, France |
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| Abstract: | MRI has proven its usefulness in the prediction of surgical anterior anal repair that cannot be done with the reference endosonographic exam. Conventional endorectal coils are often based on a single loop coil design and do not possess satisfactory radial uniformity which could impede the correct assessment of the anal sphincter. In this study, several double loop endorectal coils were designed, built, and assessed in simulations, on phantoms and in vivo. The optimum was found for a 50°–70° double loop endorectal coil which presents a better radial uniformity especially at close distance from the coil where the SNR is the highest. First in vivo experiments proved enhanced readability of the MR exam for the radiologist. © 2014 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 44B: 39–49, 2014 |
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| Keywords: | endorectal coil RF uniformity fecal incontinence |
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