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Axial DWI at the level of the ON heads in a control participant (A) and in 2 patients with clinically proven papilledema (B and C) showing lack of any hyperintensity at the ON head in the control participant, with a signal at the ON heads less than that of the globe margins. In contrast, mild (B) and prominent (C) hyperintensity at the ON heads is observed in patients with papilledema, with signal intensity minimally and substantially higher compared with the globe margins.
