Affiliation: | aDepartment of Radiology, Royal Hallamshire Hospital, UK;bDepartment of Diagnostic Radiology, Medical Physics, University Hospital Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany;cAcademic Unit of Radiology, University of Sheffield, Royal Hallamshire Hospital, UK;dSheffield Children's Hospital, Sheffield, UK;eDepartment of Neuroradiology, Royal Victoria Hospital, Belfast, UK |