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- W2152044150 abstract "Since the cancelous bone inside long bones has porous structure, the acoustic wave propagating inside bone may bring us useful information for the diagnosis of osteoporosis or bone healing although it is difficult to be investigated. In this paper, simulation techniques for understanding the complex wave propagation will be presented. The three-dimensional finite-difference time-domain (FDTD) method is useful for the wave simulation inside the complicated network structure. Due to the alignment of trabeculae, the pulse wave propagating inside cancelous bone separates into two wave, called the fast wave and slow wave. Here, the effect of the elasticity on the two wave phenomenon will be shown as well as the effect of the viscoelasticity. In addition to the speed and amplitude of the two waves, the frequency of the waves also changes corresponding to the structure of the medium. However, the detailed properties of the two waves are hardly revealed stably because of the wave overlapping. Therefore, a stable technique for quantitative evaluation of the wave characteristics is important. In this paper, the procedure and examples of a robust method of time-frequency analysis, named multi-channel instantaneous frequency, will be presented. These techniques help us understand and analyze the detailed wave behavior." @default.
- W2152044150 created "2016-06-24" @default.
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- W2152044150 date "2015-09-01" @default.
- W2152044150 modified "2023-09-24" @default.
- W2152044150 title "Simulation technique and time-frequency analysis of the acoustic wave inside cancelous bone" @default.
- W2152044150 doi "https://doi.org/10.1121/1.4933702" @default.
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