Dielectric Properties in Fresh Trabecular Bone Tissue from 1MHz to 1000MHz: A Fast and Non Destructive Quality Evaluation Technique
Dielectric Properties in Fresh Trabecular Bone Tissue from 1MHz to 1000MHz: A Fast and Non Destructive Quality Evaluation Technique
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1MHz 至 1000MHz 新鲜小梁骨组织的介电性能：一种快速、无损的质量评估技术
DOI：
10.4028/www.scientific.net/msf.638-642.730
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
E. Blangino
中科院分区：
文献类型：
--
作者：
R. Irastorza;S. Valente;F. Vericat;E. Blangino
对新型生物材料开发的研究不断增加，导致了对表征这些材料和接收它们的生物材料的非破坏性评估方法的几项研究。有多种技术可供选择。电阻抗谱作为一种替代性的工具，已成为一种广泛应用的、非破坏性的、低成本的材料质量评价技术。特别是在骨骼中，也已证明机械特性与介电特性密切相关。在这项工作中，非破坏性估计（相同的样品可以使用其他技术进行测试）的新鲜骨小梁（分层有损结构）的介电特性，使用同轴探头进行分析，从1 MHz到10 MHz（频域）和从80 MHz到1 GHz（在这两个，频域和时域）。频域系统辨识用于在低频范围内建立估计，而基于正交的辨识方法用于高频数据。对导电样品、非德拜效应和极化效应进行了评述。该方法适用于一个特定的人类样本人口的老年成人股骨头和结果在这里。并与将试样加工成直径为7mm的圆柱体的破坏性试验进行了比较。
The increasing research on development of novel bio-materials has resulted in several studies on non-destructive evaluation methods for characterizing these materials and the biological materials receiving them. A broad range of techniques are available. As an alternative tool, electrical impedance spectroscopy, has become a widely used, non destructive and low cost technique in material quality evaluation. Particularly in bones, it has also been demonstrated that mechanical characteristics are strongly correlated to dielectric properties. In this work, non destructive estimation (the same samples can be tested using other techniques) of the dielectric properties of fresh trabecular bones (layered lossy structure) using coaxial probes is analyzed from 1MHz to 10MHz (in frequency domain) and from 80MHz to 1GHz (in both, frequency and time domain). Frequency domain system identification is used to build the estimation in the low frequency range and an orthonormal based identification approach, for the high frequency data. Comments on conductive samples, non Debye dielectrics and polarization effects are added. The methodology was applied to a particular human sample population of aged adult femur heads and results are presented here. A comparison with destructive test, in which the samples were machined into cylinders of 7mm diameter, is also performed.