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首页> 外文期刊>Biomolecular engineering >Non-destructive three-dimensional evaluation of a polymer sponge by micro-tomography using synchrotron radiation.
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Non-destructive three-dimensional evaluation of a polymer sponge by micro-tomography using synchrotron radiation.

机译：通过使用同步加速器辐射的显微断层摄影术对聚合物海绵进行无损三维评估。

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摘要

X-ray micro-tomography, a non-destructive technique is used to uncover the complex 3-D micro-architecture of a degradable polymer sponge designed for bone augmentation. The measurements performed at HASYLAB at DESY are based on a synchrotron radiation source resulting in a spatial resolution of about 5.4 microm. In the present communication we report the quantitative analysis of the porosity and of the pore architecture. First, we elucidate that synchrotron radiation at the photon energy of 9 keV has an appropriate cross section for this low-weight material. Modifications in sponge micro-architecture during measurement are not detected. Second, the treatment of the data, an amount of 2.5 Gbyte to generate binary data is described. We compare the 3-D with the 2-D analysis in a quantitative manner. The obtained values for the mean distance to material within the sponge calculated from 2-D and 3-D data of the whole tomogram differ significantly: 12.5 microm for 3-D and 17.6 microm for 2-D analysis. If thepores exhibit a spherical shape as frequently found, the derived mean pore diameter, however, is overestimated only by 6% in the 2-D image analysis with respect to the 3-D evaluation. This approach can be applied to different porous biomaterials and composites even in a hydrated state close to physiological conditions, where any surface preparation artifact is avoided.
机译：X射线显微断层扫描技术是一种无损技术，用于揭示可降解的聚合物海绵的复杂3-D微结构，该海绵用于骨骼增强。 HASYLAB在DESY进行的测量基于同步辐射源，产生的空间分辨率约为5.4微米。在本通讯中，我们报告了对孔隙率和孔隙结构的定量分析。首先，我们阐明在9 keV的光子能量下的同步加速器辐射对于这种低重量材料具有合适的横截面。未检测到海绵微结构在测量过程中的变化。其次，描述数据的处理，该数据的处理量为2.5 GB以生成二进制数据。我们以定量方式将3-D与2-D分析进行比较。根据整个断层图的2-D和3-D数据计算得出的海绵内材料的平均距离值存在显着差异：3-D为12.5微米，而2-D分析为17.6微米。如果这些孔呈现出经常发现的球形，则相对于3-D评估，在2-D图像分析中得出的平均孔径仅被高估了6％。即使在接近生理条件的水合状态下，也可以将这种方法应用于不同的多孔生物材料和复合材料，从而避免了任何表面处理伪影。

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