To develop technical guidelines for magnetic resonance imaging aimed at characterising renal masses (multiparametric magnetic resonance imaging, mpMRI) and at imaging the bladder and upper urinary tract (magnetic resonance urography, MRU).
The French Society of Genitourinary Imaging organised a Delphi consensus conference with a two-round Delphi survey followed by a face-to-face meeting. Two separate questionnaires were issued for renal mpMRI and for MRU. Consensus was strictly defined using a priori criteria.
Forty-two expert uroradiologists completed both survey rounds with no attrition between the rounds. Fifty-six of 84 (67%) statements of the mpMRI questionnaire and 44/71 (62%) statements of the MRU questionnaire reached final consensus. For mpMRI, there was consensus that no injection of furosemide was needed and that the imaging protocol should include T2-weighted imaging, dual chemical shift imaging, diffusion-weighted imaging (use of multiple b-values; maximal b-value, 1000 s/mm2) and fat-saturated single-bolus multiphase (unenhanced, corticomedullary, nephrographic) contrast-enhanced imaging; late imaging (more than 10 min after injection) was judged optional. For MRU, the patients should void their bladder before the examination. The protocol must include T2-weighted imaging, anatomical fast T1/T2-weighted imaging, diffusion-weighted imaging (use of multiple b-values; maximal b-value, 1000 s/mm2) and fat-saturated single-bolus multiphase (unenhanced, corticomedullary, nephrographic, excretory) contrast-enhanced imaging. An intravenous injection of furosemide is mandatory before the injection of contrast medium. Heavily T2-weighted cholangiopancreatography-like imaging was judged optional.
This expert-based consensus conference provides recommendations to standardise magnetic resonance imaging of kidneys, ureter and bladder.
• Multiparametric magnetic resonance imaging (mpMRI) aims at characterising renal masses; magnetic resonance urography (MRU) aims at imaging the urinary bladder and the collecting systems. • For mpMRI, no injection of furosemide is needed. • For MRU, an intravenous injection of furosemide is mandatory before the injection of contrast medium; heavily T2-weighted cholangiopancreatography-like imaging is optional.
European radiology. 2020 Jan 03 [Epub ahead of print]
Olivier Rouvière, François Cornelis, Serge Brunelle, Catherine Roy, Marc André, Marie-France Bellin, Isabelle Boulay, David Eiss, Nicolas Girouin, Nicolas Grenier, Olivier Hélénon, Jean-François Lapray, Arnaud Lefèvre, Xavier Matillon, Jean-Michel Ménager, Ingrid Millet, Sébastien Ronze, Thomas Sanzalone, Jean Tourniaire, Laurence Rocher, Raphaële Renard-Penna, “French Society of Genitourinary Imaging Consensus group”
Department of Urinary and Vascular Imaging, Hôpital Edouard Herriot, Hospices Civils de Lyon, 5, place d'Arsonval, 69347, Lyon, France. ., Department of Radiology, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France., Department of Radiology, Institut Paoli-Calmettes, Marseille, France., Department of Radiology B, CHU de Strasbourg, Nouvel Hôpital Civil, Strasbourg, France., Department of Radiology, Hôpital Européen, Marseille, France., Department of Diagnostic and Interventional Radiology, Groupe Hospitalier Paris Sud, Assistance Publique-Hôpitaux de Paris, Le Kremlin Bicêtre, France., Department of Radiology, Fondation Hôpital Saint Joseph, Paris, France., Department of Adult Radiology, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France., Norimagerie, Caluire et Cuire, France., Department of Diagnostic and Interventional Adult Imaging, CHU de Bordeaux, Bordeaux, France., Centre d'Imagerie Créqui, Lyon, France., Centre d'Imagerie Médicale Tourville, Paris, France., Faculté de médecine Lyon Est, Université de Lyon, Université Lyon 1, Lyon, France., Centre d'Imagerie des Gratte-Ciel, Villeurbanne, France., Department of Radiology, Hôpital Lapeyronie, Montpellier, France., Imagerie médicale Val d'Ouest Charcot (IMVOC), Ecully, France., Department of Radiology, Centre Hospitalier de Valence, Valence, France., Department of Radiology, Clinique Rhône Durance, Avignon, France., Academic Department of Radiology, Hôpital Pitié-Salpêtrière and Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France.