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Logo for the Journal of Rehab R&D
Vol. 40 No. 2, March/April 2003
Pages 191 — 196


A digitizer with exceptional accuracy for use in prosthetics research: A technical note
Joan E. Sanders, PhD; Stuart B. Mitchell, MSE; Santosh G. Zachariah, PhD; Kelvin Wu, BSE
Department of Bioengineering, University of Washington, Seattle, WA
Abstract — A mechanical digitizer was developed for use in prosthetics research where measurements of small differences in shape are of interest. Root-mean-square error was 0.075 mm in the radial direction, 0.05 in the tangential direction, and 0.1 mm in the vertical direction. The system has potential use for time-dependent assessment of changes in socket and residuum cast shape, assessment of socket fabrication systems, and development of accurate prosthetic finite element models.
Key words: amputee, prosthetic cast, residual limb, socket shape.

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