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Updated: Jan 30, 2026
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Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature
Published on: April 5, 2013
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Contrast-Enhanced Computed Tomography for Structural and Functional Evaluation of Ligament Microdamage
Afifah H Tsurayya1,2, Jiri Jäntti1,2, Petri Paakkari1,2
1Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
Summary
This study uses micro-CT imaging with contrast agents to detect subtle ligament damage. Neutral iodixanol shows promise for assessing functional changes, while tantalum oxide nanoparticles visualize ligament structure.
Area of Science:
- Biomedical Engineering
- Radiology
- Materials Science
Background:
- Detecting microstructural ligament damage without visible tearing is difficult.
- Micro-computed tomography (micro-CT) offers potential for detailed tissue imaging.
- Contrast agents are crucial for enhancing micro-CT visualization of soft tissues.
Purpose of the Study:
- To evaluate micro-CT's efficacy in detecting microstructural ligament damage using two novel contrast agents.
- To investigate neutral iodixanol's ability to reflect functional ligament alterations.
- To assess cationic tantalum oxide nanoparticles (Ta₂O₅-cNPs) for visualizing ligament microstructure.
Main Methods:
- Bovine anterior and posterior cruciate ligaments were subjected to biomechanical tensile testing after induced microdamage.
- Samples were immersed in neutral iodixanol or Ta₂O₅-cNPs and imaged using micro-CT at multiple timepoints.
- Contrast agent diffusion and partitioning were quantified and correlated with biomechanical data.
Main Results:
- Microdamaged ligaments showed a significant 68% reduction in Young's modulus.
- Neutral iodixanol diffused faster than Ta₂O₅-cNPs, with Ta₂O₅-cNPs achieving higher maximum partition.
- While direct partition differences between healthy and damaged groups were not significant, neutral iodixanol's Pmax correlated with viscoelastic changes.
Conclusions:
- Neutral iodixanol shows sensitivity to functional, viscoelastic changes in microdamaged ligaments, correlating with biomechanical properties.
- Ta₂O₅-cNPs effectively visualize ligament structures, indicating potential for 3D histological assessment.
- Micro-CT with these contrast agents presents a promising approach for evaluating subtle ligament injuries.
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