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The Effect of Micro-Computed Tomography Thresholding Methods on Bone Micromorphometric Analysis.

Arda Buyuksungur1, Bence Tamás Szabó2, Adrienn Dobai2

  • 1Department of Basic Medical Sciences, Ankara University, 06100 Ankara, Türkiye.

Journal of Functional Biomaterials
|November 26, 2024
PubMed
Summary

Comparing micro CT thresholding methods for mouse bone analysis reveals varying agreement. Connectivity and trabecular thickness showed good agreement, aiding bone micromorphometric parameter standardization.

Keywords:
bone micromorphometrybone volumeconnectivitymicro CTtrabecular separation

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Area of Science:

  • Biomedical Engineering
  • Orthopedics
  • Radiology

Background:

  • Micro computed tomography (micro CT) is crucial for analyzing bone micromorphometric parameters in 2D and 3D.
  • These parameters are vital for studies on new bone formation, tissue engineering, and biomaterials.
  • Image segmentation using different threshold methods can yield inconsistent results in bone analysis.

Purpose of the Study:

  • To compare the efficacy of various thresholding methods for analyzing bone micromorphometric parameters in mouse tibia.
  • To evaluate the agreement between different thresholding techniques in micro CT image segmentation.
  • To identify the most reliable thresholding methods for consistent quantification of mouse bone structure.

Main Methods:

  • Utilized a dataset of 15 mouse tibiae for micro CT analysis.
  • Applied multiple thresholding methods for image segmentation of the bone structures.
  • Quantified key bone micromorphometric parameters including bone volume, trabecular number, connectivity, and separation using CTAn software.

Main Results:

  • All tested threshold methods showed some level of agreement for bone micromorphometric analyses.
  • Good agreement was observed for connectivity and trabecular thickness parameters across different methods.
  • Limited agreement was found for other parameters such as bone volume and trabecular separation.

Conclusions:

  • The choice of thresholding method significantly impacts the quantification of mouse tibia micromorphometric parameters.
  • Connectivity and trabecular thickness are relatively robust parameters across different segmentation methods.
  • Standardizing thresholding methods is essential for reliable and comparable bone analysis across research groups.