Correlations of lesion volumes between initial lesion and final infarct and between mismatch and lesion growth
| Measure | Lesion Volume (cm3) | Ratio of Lesion Volume* | Initial Lesion vs FinalInfarct | Mismatch vs Lesion Growth† | ||
|---|---|---|---|---|---|---|
| Correlation‡ | P Value | Correlation‡ | P value | |||
| DWI | 37.57 ± 39.83 | 0.60 ± 0.27 | 0.929 | <.001 | NA | NA |
| Quantitative ADC map by ADC ratio threshold | ||||||
| Mean ROI cutoff value of 0.93 | 69.57 ± 51.61 | 1.37 ± 0.70 | 0.911 | <.001 | 0.483 | .111 |
| Pixel cutoff value of 0.79 | 45.57 ± 39.62 | 0.79 ± 0.31 | 0.922 | <.001 | 0.117 | .716 |
| Quantitative DWI by signal intensity ratio threshold | ||||||
| Mean ROI cutoff value of 1.10 | 85.23 ± 65.17 | 1.72 ± 1.04 | 0.929 | <.001 | 0.666 | .018 |
| Pixel cutoff value of 1.19 | 63.54 ± 57.24 | 1.14 ± 0.58 | 0.930 | <.001 | 0.652 | .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.