Scatterplot of the log of infarct signal intensity on DW images versus the log of hours from symptom onset. Scatterplot of the log of infarct signal intensity on DW images versus the log of hours from symptom onset. The thick line represents the polynomial function of best fit for the study data. The thin lines represent the 95% confidence limits for this fitted curve. The expected signal intensity of lesions was greater than that of control regions during the first 57 days after symptom onset. James D. Eastwood et al. AJNR Am J Neuroradiol 2003;24:680-687 ©2003 by American Society of Neuroradiology