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From left to right: representative post-contrast T1, post-contrast SWI, and FLAIR images of non-enhancing lesion subtypes. (A) Homogenously hypointense lesion, (B) ring-shaped distribution of susceptibility dots, (C) scattered distribution of susceptibility dots, and (D) lesion with a central dark region. SWI, susceptibility-weighted magnetic resonance imaging; FLAIR, fluid-attenuated inversion recovery.
