Computed microtomography and X-ray fluorescence analysis for comprehensive analysis of structural changes in bone.

Area of Science:

• Comparative anatomy
• Xenobiology
• Biomineralization

Background:

• Reptiles are valuable models for spaceflight research due to their resilience and unique biological features.
• Understanding potential bone tissue alterations in reptiles during space missions is critical for long-duration experiments.
• Turner's thick-toed geckos (Phyllodactylus) serve as a model organism for this investigation.

Purpose of the Study:

• To comprehensively analyze structural changes in the caudal vertebrae of Turner's thick-toed geckos.
• To develop and present algorithms for reconstructing tomographic images from high-noise projections.
• To assess the suitability of reptiles as biological models for spaceflight research.

Main Methods:

• Computer microtomography for high-resolution 3D imaging of bone structure.
• X-ray fluorescence analysis for elemental composition of the vertebrae.
• Development of image reconstruction algorithms to handle noisy projection data.

Main Results:

• Detailed characterization of structural integrity and composition in gecko caudal vertebrae.
• Successful application of novel algorithms for image reconstruction under challenging conditions.
• Quantification of mineral distribution within the bone tissue.

Conclusions:

• The study provides a foundational understanding of gecko bone structure relevant to space biology.
• The developed imaging techniques are robust for analyzing biological samples in simulated or actual space environments.
• Further research into reptile bone adaptation is warranted for future space exploration.