For thoracic and abdominal injury risk during blunt lateral impact, deformation (deflection) has been identified as an injury metric. With stationary biological test subjects, this metric has been obtained uniaxially from depth-limited impactors [1] and from post-experiment digitization of videography [2]. In sled experiments, deflection has been measured by videography of innovative marker sets [3] and by chestband transducers [4]. With the chestband, resistive strain gage time traces are recorded and reconstructed into closed contours representing the thoracic or abdominal circumference in the transverse plane. The resulting contours reveal thoracoabdominal deformation patterns in two dimensions. These patterns are important for side airbag interactions as they induce complex posterolateral deformations [5].

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