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Feasibility of controlling prosthetic hand using sonomyography signal in real time: Preliminary study

Author(s): Jun Shi, PhD | Qian Chang, BSc | Yong-Ping Zheng, PhD

Journal: Journal of Rehabilitation Research and Development
ISSN 0748-7711

Volume: 47;
Issue: 2;
Start page: 87;
Date: 2010;
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Keywords: block-matching algorithm | electromyography | prosthetic control | prosthetic hand | real time | skeletal muscle | sonomyography | streaming SIMD extensions | two-dimensional logarithmic search | ultrasound

The morphological changes of muscle can be accurately detected by sonography, a process we have termed sonomyography (SMG). This article investigates the feasibility of using muscle thickness deformation SMG as a new signal source to control a prosthetic hand in real time. Thickness deformation SMG of the extensor muscle was measured by a block-matching algorithm during wrist extension-flexion; the amplitude of the deformation was used to control the prosthetic hand. We compared various fast-search algorithms to select the best one for real-time prosthetic control. The two-dimensional logarithmic search (TDL) algorithm, with and without streaming single-instruction multiple-data extensions, showed excellent execution efficiency, with an overall mean correlation coefficient of about 0.99, a mean standard root-mean-square error

Tango Jona
Tangokurs Rapperswil-Jona

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