کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5485388 | 1523188 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dispersion characteristics of the flexural wave assessed using low frequency (50-150Â kHz) point-contact transducers: A feasibility study on bone-mimicking phantoms
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dispersion characteristics of the flexural wave assessed using low frequency (50-150Â kHz) point-contact transducers: A feasibility study on bone-mimicking phantoms Dispersion characteristics of the flexural wave assessed using low frequency (50-150Â kHz) point-contact transducers: A feasibility study on bone-mimicking phantoms](/preview/png/5485388.png)
چکیده انگلیسی
Guided waves-based techniques are currently under development for quantitative cortical bone assessment. However, the signal interpretation is challenging due to multiple mode overlapping. To overcome this limitation, dry point-contact transducers have been used at low frequencies for a selective excitation of the zeroth order anti-symmetric Lamb A0 mode, a mode whose dispersion characteristics can be used to infer the thickness of the waveguide. In this paper, our purpose was to extend the technique by combining a dry point-contact transducers approach to the SVD-enhanced 2-D Fourier transform in order to measure the dispersion characteristics of the flexural mode. The robustness of our approach is assessed on bone-mimicking phantoms covered or not with soft tissue-mimicking layer. Experiments were also performed on a bovine bone. Dispersion characteristics of measured modes were extracted using a SVD-based signal processing technique. The thickness was obtained by fitting a free plate model to experimental data. The results show that, in all studied cases, the estimated thickness values are in good agreement with the actual thickness values. From the results, we speculate that in vivo cortical thickness assessment by measuring the flexural wave using point-contact transducers is feasible. However, this assumption has to be confirmed by further in vivo studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics - Volume 81, November 2017, Pages 1-9
Journal: Ultrasonics - Volume 81, November 2017, Pages 1-9
نویسندگان
Koussila Kassou, Youcef Remram, Pascal Laugier, Jean-Gabriel Minonzio,