Dr. Heike Scherf Profile

Dr. Heike Scherf

at Forschungsinstitut Senckenberg

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Proceedings Article | 26 October 2004 Paper

Internal channel structures in trabecular bone

Heike Scherf, Felix Beckmann, Jens Fischer, Frank Witte

Proceedings Volume 5535, (2004) https://doi.org/10.1117/12.557178

KEYWORDS: Bone, Minerals, X-rays, Image resolution, Tissues, Synchrotron radiation, X-ray computed tomography, X-ray imaging, Spatial resolution, Tomography

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Material properties of bone are crucial for studies regarding the mechanical behavior of bone. The mechanical behavior depends on the macro- and micro-architecture as well as the organic and mineral content of bone. The marco-architecture of bone is normally analyzed by plane radiographs. The micro-architecture of the trabecular bone can be imaged by high resolution CT imaging techniques using conventional x-ray tubes. However, fine structures in bone architecture cannot be sufficiently analyzed by this technique due to its limited resolution. High resolution CT imaging technique using synchrotron radiation generates images with a high spatial resolution of bone structures on a micron scale. Additionally, this imaging technique provides superior determination of local differences in the bone mineral density. Two microtomography techniques, first: based on conventional x-ray tubes and second: based on synchrotron radiation were compared in this study to detect fine bone structures such as inner trabecular channels. In two red howler monkeys (Alouatta seniculus) femora channel structures were found inside the trabecular bone by both techniques. Only synchrotron-based microtomography was able to detect layers of lower mineral density in the channel walls. The found structures in trabecular bone are normally expected in the Haversian channel walls of the cortical bone. However, the origin of the trabecular channel structure is not fully understood. We found, that synchrotron-based microtomography is a very valuable technique in the research of fine bone structures. Further research should focus on the impact of these findings on the mechanical properties of trabecular bone.

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