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Ovine Bone Morphology and Deformation Analysis Using Synchrotron X-ray Imaging and Scattering

机译：绵羊骨形态和变形分析使用同步X射线成像和散射

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摘要

Bone is a natural hierarchical composite tissue incorporating hard mineral nano-crystals of hydroxyapatite (HAp) and organic binding material containing elastic collagen fibers. In the study, we investigated the structure and deformation of ovine bone by the combination of high-energy synchrotron X-ray tomographic imaging and scattering. X-ray experiments were performed prior to and under three-point bending loading by using a specially developed in situ load cell constructed from aluminium alloy frame, fast-drying epoxy resin for sample fixation, and a titanium bolt for contact loading. Firstly, multiple radiographic projection images were acquired and tomographic reconstruction was performed using SAVU software, following segmentation using Avizo. Secondly, Wide Angle X-ray Scattering (WAXS) and Small Angle X-ray Scattering (SAXS) 2D scattering patterns were collected from HAp and collagen. Both sample shape and deformation affect the observed scattering. Novel combined tomographic and diffraction analysis presented below paves the way for advanced characterization of complex shape samples using the Dual Imaging and Diffraction (DIAD) paradigm.
机译：骨是一种掺入羟基磷灰石（HAP）的硬矿物纳米晶体的天然等级复合组织和含有弹性胶原纤维的有机结合材料。在研究中，我们通过高能同步X射线断层切断成像和散射的组合调查了绵羊的结构和变形。通过使用由铝合金框架，用于样品固定的快干环氧树脂构成的特殊开发的原位载荷电池，以及用于样品固定的钛螺栓，在三点弯曲载荷下进行X射线实验，以及用于接触载荷的钛螺栓。首先，获取多个射线照相投影图像并使用Avizo进行分段后使用Savu软件进行断层切断重建。其次，从HAP和胶原中收集广角X射线散射（蜡）和小角度X射线散射（SAX）2D散射图案。样品形状和变形均影响观察到的散射。下面提出的新型组合断层和衍射分析铺平了使用双重成像和衍射（DiaD）范例的复杂形状样品的先进表征的方式。

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