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FIG 1. Semiautomated method of obtaining BPF. A, Raw T1-weighted 2D spin-echo noncontrast axial sequence. B, After masking (removal) of extracranial tissue. The segmented image (C) results from separation of the parenchyma (black) and CSF (white) into two compartments. The image surrounded by the white square (C) is used to identify normal-appearing white matter for the thresholding technique (see Methods). Adapted from Bermel et al (25).
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