Related Experiment Videos
A preliminary study of skin electrical injury with computerized image analysis
1Department of Forensic Pathology, Sun Yat-sen University of Medical Science, Guangzhou, P.R. China.
Forensic Science International
|June 21, 1995
Summary
Computerized image analysis offers an objective standard for identifying electrical skin injuries. Cell nucleus shape analysis reveals significant differences between normal and injured skin, aiding in injury assessment.
Area of Science:
- Forensic pathology
- Digital image analysis
- Dermatology
Background:
- Electrical injuries present diagnostic challenges, particularly distinguishing between antemortem and postmortem injuries.
- Objective quantitative methods are needed to establish reliable standards for identifying electrical marks on skin.
- Cellular morphology, specifically nuclear shape, may offer distinguishing features.
Purpose of the Study:
- To apply computerized image analysis for objective quantification of skin electrical injuries.
- To establish a quantitative standard for identifying electrical marks.
- To investigate differences between antemortem and postmortem electrical injuries using nuclear morphology.
Main Methods:
- Quantitative analysis of the long/short axes ratio of cell nuclei (epithelial basal cells, hair follicle cells, capillary endothelial cells) in human and rat skin specimens.
- Comparison of nuclear morphology in normal skin versus electrically injured skin.
- Comparison of nuclear morphology in antemortem versus postmortem electrical injuries.
Main Results:
- Significant differences were observed in the long/short axes ratios of epithelial basal cell nuclei and hair follicle cell nuclei between normal and electrically injured skin.
- No significant differences were found in the long/short axes ratios of capillary endothelial cell nuclei between normal and electrically injured skin.
- No significant differences were detected in nuclear morphology ratios between antemortem and postmortem electrical injuries across all cell types studied.
Conclusions:
- Computerized image analysis of nuclear morphology provides a preliminary objective standard for identifying electrical skin injury.
- Epithelial basal cells and hair follicle cells show significant changes indicative of electrical injury.
- Capillary endothelial cell nuclei morphology does not reliably differentiate between electrical injury and normal skin, nor between antemortem and postmortem injuries.