Validation of chest X-ray comparisons for unknown decedent identification

Area of Science:

• Forensic Radiology
• Radiographic Identification
• Forensic Anthropology

Background:

• Radiographic comparison of skeletal structures is a common forensic technique for identifying unknown decedents.
• Previous validity assessments of this identification method have been limited.

Purpose of the Study:

• To quantify the reliability of comparing antemortem and postmortem chest radiographs for decedent identification.
• To identify key radiologic features that aid in decedent identification.
• To recognize potential sources of error in radiographic identification.

Main Methods:

• A multidisciplinary team including a forensic pathologist, forensic anthropologist, and radiologists participated.
• Comparative analysis of antemortem and postmortem chest radiographs was performed.
• Evaluation focused on reliability, useful features, and error sources.

Main Results:

• Chest radiograph comparison demonstrated reliability when essential decedent information was provided.
• Adequate positioning and exposure of both antemortem and postmortem radiographs are crucial.
• A morphological approach utilizing normal anatomical structures proved efficient for accurate identification.

Conclusions:

• Radiographic comparison is a reliable tool for decedent identification under optimal conditions.
• Careful attention to image quality and provided information is necessary for accurate results.
• The morphological approach offers an efficient and accurate method for identification via chest radiographs.