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Images present the normal gray/white matter boundary (GWB) (A,C) and focal cortical dysplasia (FCD) region (B,D) with blurred GWB. The intensities on blurry region vary slowly as shown in (C), while they vary sharp on normal GWB region as shown in (D). When look at the GWB in space, the blurred GWB is wider than the normal GWB (A vs. B), indicating that the blurred GWB can be also considered as broadened GWB.
