1. Department of NeuroradiologyHospices Civils de Lyon Bron France
2. CREATIS CNRS UMR 5220, INSERM U1044 Villeurbanne cedex France
3. INSERM U1216Grenoble Institut des Neurosciences La Tronche France
4. Université Grenoble Alpes Saint‐Martin‐d'Hères France
5. Department of Vascular Neurology, Hospices Civils de LyonHôpital Pierre Wertheimer Bron France