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MR images of Type I and Type V lesions. The Type I lesion (arrow) is seen on (a) T1-weighted, (b) FSE T2-weighted, (c) T2*-weighted GRE and (d) SWI images. The Type V lesion is seen only on the (d) SWI image as a hypo-intense, punctate area (arrowhead).
FSE: fast-spin echo; GRE: gradient echo images; MR: magnetic resonance; SWI: susceptibility-weighted imaging
