Abstract Summary
Effective prosthetic socket design following lower-limb amputation depends upon the accurate characterization of the residuum shape and volume fluctuations. This study proposes a novel framework for measuring and analyzing residuum shape and deformation, using a high-resolution low-cost system. A multi-camera system was designed to capture simultaneous images of the residuum surface. The images were analyzed using a specially developed open-source 3D digital image correlation (3D-DIC) toolbox, to obtain accurate time-varying shapes and full-field strain maps, as well as the enclosed volumes and cross-sectional areas of the residuum. Measurements on a transtibial amputee were obtained during knee flexions, muscle contractions, and swelling post-doffing. This novel framework provides a promising solution for the in-vivo evaluation of residuum shapes, strains, and mechanical properties. These data may inform data-driven computational algorithms for prosthetic socket design.
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