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Axial (a) FLAIR MR image shows a T2 hyperintense periventricular CSVD lesion (arrow). On corresponding (b) SWI image and (c) magnified SWI image, the central vein sign was identified as a central punctate vein showing a signal void within the CSVD lesion (arrowhead). FLAIR: fluid-attenuated inversion recovery; MR: magnetic resonance; CSVD: cerebral small vessel disease; SWI: susceptibility-weighted imaging.
