Deep Gray Matter Iron Content in Neuromyelitis Optica and Multiple Sclerosis

Figure 2

Comparison of axial images at the level of mesencephalon; gradient-echo magnitude (a) and quantitative susceptibility map (b) of a typical healthy control (upper row) and typical age-matched neuromyelitis optica patient (bottom row). The substantia nigra is denoted by white arrowhead. Magnetic susceptibility scale in ppb is shown.