Predictive Value of Gray-Matter–White-Matter Ratio on Brain Computed Tomography for Delayed Encephalopathy after Acute Carbon Monoxide Poisoning: A Retrospective Cohort Study

Figure 1

Circular regions of interest were placed bilaterally on brain computed tomography. The regions of interest used for computing the estimation of gray matter to white matter ratio: (a) basal ganglia, (b) centrum semiovale, and (c) high convexity. CC: corpus callosum; CN: caudate nucleus; PU: putamen; PIC: posterior limb of the internal capsule; MC1: medial cortex at centrum semiovale level; MC2: medial cortex at high-convexity area; MW1: medial white matter at centrum semiovale level; MW2: medial white matter at high-convexity area.

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(b)

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