Related Experiment Video
Updated: Jul 17, 2026

11:28
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
The even-number guide and imaging ballistic injuries
Les Folio1, Catherine McHugh, Matthew J Hoffman
1Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
Radiologic Technology
|January 24, 2007
Summary
A new even-number guide helps trauma teams quickly account for all metallic fragments in patients with ballistic injuries. This method aids in locating retained fragments and improves communication among medical professionals.
Area of Science:
- Medical imaging
- Trauma surgery
- Ballistics
Background:
- Accurate accounting of all metallic fragments is crucial in patients with multiple ballistic injuries.
- Combat experience highlights the need for systematic approaches to manage shrapnel and bullet fragments.
Purpose of the Study:
- To introduce an even-number guide for rapidly accounting for metallic foreign bodies in blast or shooting injuries.
- To present cases illustrating the utility of this guide.
- To introduce total-body digital radiography (DR) as an evolving technology for locating ballistic fragments.
Main Methods:
- Development and application of an even-number guide for fragment accounting.
- Case study presentations to demonstrate the guide's effectiveness.
- Introduction of total-body digital radiography (DR) technology.
Main Results:
- The even-number guide facilitates quick accounting of metallic foreign bodies.
- Deviation from the even-number rule suggests the need for radiographic searches for displaced fragments.
- Total-body DR is presented as a potentially valuable tool for comprehensive ballistic fragment detection.
Conclusions:
- Patients with multiple ballistic injuries should ideally have an even number of entrance/exit wounds and fragments.
- Radiographic investigation is warranted when the fragment count deviates from the even-number guide.
- The guide enhances communication within multispecialty trauma teams.

