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Barium sulfate emulsion enhances computed tomography (CT) imaging of missile impact tears in ordnance gelatine. This improves the visualization and 3D reconstruction of temporary cavities, aiding ballistic analysis.

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Area of Science:

  • Ballistics
  • Forensic Science
  • Medical Imaging

Background:

  • Missile impacts create temporary cavities with radial tears in ordnance gelatine.
  • Computed tomography (CT) is a non-destructive method for examining these gelatine blocks.
  • Air-filled tears in gelatine offer poor radiocontrast, diminishing over time, hindering CT analysis.

Purpose of the Study:

  • To find a radiocontrast material to enhance CT imaging of missile impact tears in gelatine.
  • To improve the accuracy and evaluation of complex ballistic models using CT.

Main Methods:

  • Barium sulfate emulsion mixed with acryl paint was sealed in a foil bag and placed in gelatine cylinders.
  • Gelatine blocks were subjected to missile impacts (Action-5 bullets) from a 5-m distance.
  • Multi-slice CT scans were performed, and reconstructed images were compared with mechanically cut slices.

Main Results:

  • Iodine-based contrast agents caused diffusion artifacts and insufficient contrast.
  • Barium sulfate emulsion provided excellent radiocontrast, enabling clear imaging of tears.
  • The barium sulfate-enhanced CT allowed for 3D reconstruction of the temporary cavity.
  • CT measurements were consistently lower than optical measurements.

Conclusions:

  • Barium sulfate emulsion is effective for enhancing CT imaging of ballistic gelatine impacts.
  • Combining acryl paint with barium sulfate improves tear visualization and 3D reconstruction accuracy.
  • This method facilitates the evaluation of complex ballistic models and increases analytical accuracy.