生体医工学
解説特集 多階層生体機能学の創成に向けたシミュレーション研究の成果と進展
Shape Matching法による心臓拍動のビジュアルシミュレーション
井尻 敬芦原 貴司梅谷 信行小山 裕己五十嵐 健夫原口 亮横田 秀夫中沢 一雄
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53 巻 (2015) 3 号 p. 130-137

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A shape matching dynamics (SMD) is a robust and efficient elastic model based on geometric constraints. This article introduces our study [1] that adopts SMD to visual simulation of cardiac beating motion. In our technique, a heart is represented by a tetrahedral mesh model and a local region is defined at each vertex by connecting its immediate neighbors. During the simulation, we first contract all local regions depending on predefined muscle fiber orientations and contraction rate. Then using SMD, we compute the global shape of the heart model so that it satisfies the contracted local regions. Our technique introduces a fiber-orientation-dependent weighting function to emulate an anisotropic stiffness of myocardium. Since our technique is based on SMD, it is possible to compute cardiac motion in real-time on a commercially available PC.

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© 2015 社団法人日本生体医工学会
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Advanced Biomedical Engineering
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