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Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
Published on: January 24, 2016
Strain field measurements on mouse carotid arteries using microscopic three-dimensional digital image correlation
M A Sutton1, X Ke, S M Lessner
1Department of Mechanical Engineering, University of South Carolina, Columbia, South Carolina 29208, USA. Sutton@sc.edu
Journal of Biomedical Materials Research. Part A
|July 4, 2007
Summary
This study introduces a calibrated stereomicroscope system for precise biomechanical analysis of mouse carotid arteries. The technique accurately quantifies microscale displacement and strain fields, aiding in understanding vessel properties.
Area of Science:
- Biomechanics
- Biomedical Engineering
- Materials Science
Background:
- Accurate measurement of biomechanical properties in small arteries is crucial for understanding vascular diseases.
- Existing methods may lack the necessary spatial and displacement resolution for microscale analysis.
- Quantifying changes in extracellular matrix composition requires high-resolution techniques.
Purpose of the Study:
- To adapt and calibrate a stereomicroscope system for quantitative microscale displacement and strain field measurements.
- To validate the system's performance on mouse carotid arteries under physiological pressure cycling.
- To enable the quantification of local biomechanical responses related to extracellular matrix variations.
Main Methods:
- A stereomicroscope system was calibrated using a novel two-step process.
- Three-dimensional digital image correlation (3D-DIC) was employed for data analysis.
- Measurements were performed on 0.40-mm-diameter mouse carotid arteries during pressure cycling.
Main Results:
- The calibrated system achieved microscale spatial resolution and nanoscale displacement resolution.
- Full 3D displacement and surface strain fields were successfully measured.
- The technique demonstrated the ability to quantify microscale biomechanical changes in the arteries.
Conclusions:
- The adapted stereomicroscope system with 3D-DIC provides accurate, quantitative biomechanical measurements of mouse carotid arteries.
- The validated calibration process ensures reliable data for microscale analysis.
- This technique offers a powerful tool for investigating the relationship between extracellular matrix composition and vascular biomechanics.
