Visualization and documentation of perimortem traits in long bone fractures using computed tomography

Area of Science:

• Forensic Science
• Radiology
• Orthopedic Pathology

Background:

• Perimortem fractures exhibit distinct patterns (layered breakage, bone scales, etc.) crucial for differentiating ante-mortem from post-mortem injuries.
• Accurate identification of fracture patterns aids trauma analysis and legal investigations.

Purpose of the Study:

• To evaluate the efficacy of Computed Tomography (CT) in visualizing and analyzing perimortem fracture patterns in long bones.
• To determine if CT, a non-invasive 3D imaging technique, can reliably document fracture traits previously identified through invasive methods.

Main Methods:

• CT scans were performed on 15 macerated long bone samples (1 humerus, 1 ulna, 1 radius, 12 femurs).
• Multi-planar reconstructions (MPRs) and volume renderings were utilized to analyze the bone samples.
• Specific perimortem fracture traits were assessed for their visibility and clarity on CT images.

Main Results:

• Tension lines and severe plastic deformation were clearly visible on MPRs and 3D models.
• Layered breakage and flake defects were distinctly identifiable on volume renderings.
• CT imaging demonstrated its capability to visualize key perimortem fracture characteristics.

Conclusions:

• Computed Tomography (CT) is a viable and efficient tool for documenting and analyzing blunt force trauma in forensic investigations.
• The non-invasive nature and 3D visualization capabilities of CT enhance its utility in identifying perimortem fractures.
• CT imaging offers a promising advancement for forensic science in trauma analysis.