Does cone beam CT actually ameliorate stab wound analysis in bone?

Area of Science:

• Forensic Anthropology
• Radiology
• Digital Imaging

Background:

• Cone beam CT (CBCT) is a recent radiological technology.
• Digital 3D models can aid in analyzing bone tissue morphology.
• Sharp force wound analysis is crucial in forensic investigations.

Purpose of the Study:

• To evaluate CBCT's efficacy in reproducing digital 3D models of sharp force wounds in bone.
• To assess the potential of CBCT for differentiating between single and double-edged tool marks.
• To determine the reliability of CBCT in metric analysis of bone lesions.

Main Methods:

• Sharp force wounds were created on cancellous and cortical bone using single and double-edged weapons.
• Bone samples with lesions were scanned using CBCT.
• Lesions were analyzed using DICOM viewers and reverse engineering software.

Main Results:

• CBCT generated reliable 3D models for wounds on cancellous bone, revealing internal morphology.
• CBCT performance was limited for lesions on cortical bone.
• Metric analysis showed increased error for measurements under 3mm, with high operator variability.

Conclusions:

• CBCT technology can enhance the investigation of stab wounds in cancellous bone.
• Differential diagnosis between single and double-edged tool marks may be possible with CBCT.
• Metric analysis and morphological assessment of small lesions (<3mm) using CBCT are currently unreliable.