B324 超音波計測融合血流シミュレーションのフィードバック則に関する検討(B-32 生物流体(2),一般講演)

概要

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In order to reproduce the blood velocity and pressure fields of the blood flow for an accurate diagnosis or treatment for serious circulatory diseases such as aortic aneurysms, we integrate color Doppler ultrasonography and numerical simulation. We term this method as Ultrasonic-Measurement-Integrated (UMI) simulation. In the UMI simulation, feedback signals are added to the governing equations to compensate for the difference between computation and measurement. In this paper, we investigate effects of feedback law of the UMI simulation, such as feedback formulae, number and arrangement of monitoring points and the direction of ultrasonic beam for acquisition of Doppler velocity data, on the accuracy of the UMI simulation and computational time. It is revealed that the result of UMI simulation in the feedback domain rapidly converges to the standard solution, even with inevitably incorrect upstream boundary conditions.
日本流体力学会の論文
2004-08-09