Fig. 1From: Detection of central veins using susceptibility weighted imaging (SWI) for discrimination between lesions in multiple sclerosis (MS) and cerebral small vessel disease (CSVD)Magnified SWI images showing the morphology of the central vein sign according to vein direction. a Lesion with “coffee bean” appearance in which a thin hypointense line (representing the CVS) is seen running through the lesion and intersecting it. b Lesion with “doughnut” appearance, in which a hypointense central circular dot is noted and representing the CVSBack to article page