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TABLE 3: 
Correlations of lesion volumes between initial lesion and final infarct and between mismatch and lesion growth
MeasureLesion Volume (cm3)Ratio of Lesion Volume*Initial Lesion vs FinalInfarctMismatch vs Lesion Growth†
Correlation‡P ValueCorrelation‡P value
DWI37.57 ± 39.830.60 ± 0.270.929<.001NANA
Quantitative ADC map by ADC ratio threshold
    Mean ROI cutoff value of 0.9369.57 ± 51.611.37 ± 0.700.911<.0010.483.111
    Pixel cutoff value of 0.7945.57 ± 39.620.79 ± 0.310.922<.0010.117.716
Quantitative DWI by signal intensity ratio threshold
    Mean ROI cutoff value of 1.1085.23 ± 65.171.72 ± 1.040.929<.0010.666.018
    Pixel cutoff value of 1.1963.54 ± 57.241.14 ± 0.580.930<.0010.652.022
  • * Ratio of lesion volumes on DW images and on quantitative DW images or ADC maps to the final infarct volume of 70.09 ± 65.19 cm3.
  • † NA indicates not applicable. Mismatch is the difference in lesion volume between the initial qualitative DW image and the quantitative DW image or ADC map.
  • ‡ Pearson correlation coefficient.