Table 2.
The mean and standard deviation (SD) of bruise sizes, maximum and minimum Feret's diameter, area and aspect ratio of 19 bruises seen in all four imaging modalities: conventional, cross polarized, infra-red and ultra-violet.
| Bruise descriptor | Conventional | Cross polarized | Infra-red | Ultra-violet |
|---|---|---|---|---|
| Maximum Feret's diameter (mm) | 22.90 (12.49) | 24.44, (13.61) (p = 0.66) | 18.06*, (11.27) (p < 0.05) | 21.95, (10.05) (p = 0.59) |
| Minimum Feret's diameter (mm) | 14.41, (6.86) | 15.21, (8.15) (p = 0.59) | 11.67*, (7.86) (p = 0.03) | 14.82, (7.64) (p = 0.61) |
| Area (mm2) | 239.92, (232.18) | 265.09, (257.73) (p = 0.63) | 156.51*, (208.47) (p = 0.03) | 233.57, (222.07) (p = 0.55) |
| Aspect ratio | 1.68, (0.49) | 1.73, (0.54) (p = 0.68) | 1.75, (0.65) (p = 0.55) | 1.63, (0.45) (p = 0.48) |
* indicates a significant difference between the individual modality and conventional measurement by Wilcoxon rank sum test (p < 0.05). mm = millimeter. mm2 =millimeter.