912 スペックル干渉法を用いた骨折の非侵襲評価法に関する実験的および数値的研究(J04-3 臨床医歯学における非・低侵襲計測技術の展開(3) 光および超音波による診断・治療技術,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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This paper proposes a noninvasively measuring method for evaluating the state of fractured bone using a time series analysis based on speckle interferometry. In order to know the healing state of fractured bone, the out-of-plane displacement of the skin around fractured part is measured using speckle interferometry and its distribution is obtained as speckle fringes. Then the fine fringes generated at the fractured part are detected with a time series image analysis based on a gradient-based method, and the resulting optical flows are used for constructing the estimator evaluating the state of bone fracture. The performance test using a test phantom shows that there is a detectable difference in the proposed estimator between the cases with cut and without it in an internal hard object of the phantom. The numerical analysis of elastic body using a particle method shows that the numerical results are in agreement with those obtained in the experimental test.
2008-08-02