Abstract
Fitting sockets techniques, which lower limb mainly affects prostheses, using laser measuring and CAD/CAM are approached, but skilled engineer is behooved when shapes of socket are determined. On the other hand, if stress affect on soft tissues, when the amputee fits the lower limb prosthesis can be calculated, accurate fitting operation will be facilitating. To solve these problems, the ultrasonic 3-D shape measurement system was carried out, that can measure soft tissue and bone. The echo from each soft tissue was measured to construct 3-D finite element model, and investigated extraction of the position of each echo pattern. Echo pattern were estimated through wavelet analysis, and it was shown that each boundary of soft tissue could be distinguished. Based on these echo reflection time, each thickness of soft tissue is calculated, and each coordinate value can be founded. These coordinates are reconstructed on 3-D coordinate axis of this measurement system, and we suggested the possibility of the construct of 3-D lower limb model.
