Blunt trauma to the torso can occur from bullet deformations when impacting body armour. The Blunt Trauma Thoracic Rig (BTTR) assesses the risks of blunt trauma based on dynamic loading effects. Injury risk can also be assessed for other types of blunt loading including less-lethal ammunition impact and blunt impacts on riot control gear and other protective equipment. The non-contact laser sensor measures dynamic chest wall defection to assess injury risk.