TABLE 2:

Summary of findings on conventional MR images, DWIs, and ADC maps, with ADC values in five patients with delayed encephalopathy of CO intoxication

Patient	Interval to Imaging, d*	Findings on T2-Weighted and FLAIR Images	Findings on DWIs	Findings on ADC Maps	Mean ADC Values, ×10−3 mn
1	25	Diffuse high intensity in the PVWM and centrum semiovale, more prominent in both frontal lobes; high intensity in both globi pallidus	Diffuse high intensity in the PVWM and centrum semiovale, more prominent in both frontal lobes	Focal areas of low intensity in both frontal lobes	0.61 (0.53–0.70)/0.89
2	41	Asymmetric high intensity in the PVWM, centrum semiovale, and corpus callosum; more prominent on R side	Asymmetric high intensity in the PVWM, centrum semiovale, and corpus callosum; more prominent on the R side	Focal areas of low intensity in R frontal lobe	0.65 (0.53–0.75)/0.91
3	56	Diffuse high intensity in the PVWM and centrum semiovale	Diffuse high intensity in the PVWM and centrum semiovale	Focal areas of low intensity in both frontal lobes	0.64 (0.55–0.73)/0.93
4	55	Diffuse high intensity in the PVWM and centrum semiovale	Diffuse high intensity in the PVWM and centrum semiovale	Diffuse low intensity in the PVWM	0.56 (0.46–0.71)/0.86
4‡	82	No change	No change	No change	0.53 (0.41–0.71)/0.91
5	95	Diffuse high intensity in the PVWM and centrum semiovale, more prominent in both frontal lobes; high intensity in both globi pallidus	Diffuse high intensity in the PVWM and centrum semiovale	Focal areas of low intensity in both frontal lobes	0.75 (0.68–0.85)/0.94

Note.—PVWM indicates periventricular white matter.

^*Interval between CO Exposure and MR Imaging.

^†Data are the value in the WM lesions (range)/value in normal-looking WM on T2-weighted images.

^‡Follow-up MR examination.