FIG 2. T1-weighted image obtained 12 days after exposure to carbon monoxide (A) shows slightly high-signal-intensity lesions with relatively low-intensity rim in the bilateral globi pallidi. T2-weighted image (B) shows slightly low-signal-intensity lesions with high-signal-intensity rim in the bilateral globi pallidi. Coronal T2-weighted image (C) reveals high-signal-intensity lesions in the bilateral substantia nigra, in addition to high-signal-intensity pallidal lesions. Diffusion-weighted image (D) reveals high-signal-intensity lesions in the pars reticulata of the bilateral substantia nigra. Corresponding ADC map (E) demonstrates low signal intensity in the bilateral substantia nigra.