Conference proceeding
Beyond the Airbrush: Applications of Digital Image Correlation in Vascular Biomechanics
ADVANCEMENT OF OPTICAL METHODS & DIGITAL IMAGE CORRELATION IN EXPERIMENTAL MECHANICS, VOL 3, v 12, pp 1-4
01 Jan 2019
Abstract
Before digital image correlation (DIC) could find widespread application for strain measurement in biological soft tissues, there were a number of technical challenges that had to be addressed. The mechanical behavior of soft tissues depends significantly on hydration state; therefore, both application of a high-contrast speckle pattern and imaging must be achieved while maintaining the specimen in a fully hydrated state. Furthermore, soft tissues such as arteries typically undergo finite deformations under a physiologically relevant loading range. While hydration can be achieved by submerging the sample in a medium having appropriate osmolarity, pH, and ionic strength, imaging submerged objects introduces its own set of challenges due to refractive index changes. The issue of sample hydration also requires consideration of alternative approaches to speckle pattern creation, beyond the classic "airbrush method," since ideally the specimen must not be allowed to dry out during pattern application. For samples that are submerged, the speckle pattern must be firmly bonded to the specimen and water-resistant, in addition to deforming with the specimen, often outside the small-strain regime. In some specific instances, nature provides a hand through the presence of intrinsic fine-scale structure in the specimen that, with innovative staining or imaging techniques, can serve as a satisfactory "speckle pattern." Added to these issues is the difficulty of imaging small, often irregularly shaped specimens that can degrade rapidly over time. In collaboration with Dr. Sutton's group, my colleagues and I have developed a number of approaches to address the issues of hydrating and speckling soft tissues for measurement of local strains in blood vessels at multiple length scales, with a particular focus on the mouse aorta and carotid artery.
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Details
- Title
- Beyond the Airbrush: Applications of Digital Image Correlation in Vascular Biomechanics
- Creators
- Susan M. Lessner - University of South CarolinaJohn F. Eberth - University of South Carolina
- Contributors
- L Lamberti (Editor)M T Lin (Editor)C Furlong (Editor)C Sciammarella (Editor)P L Reu (Editor)M A Sutton (Editor)
- Publication Details
- ADVANCEMENT OF OPTICAL METHODS & DIGITAL IMAGE CORRELATION IN EXPERIMENTAL MECHANICS, VOL 3, v 12, pp 1-4
- Series
- Conference Proceedings of the Society for Experimental Mechanics Series
- Publisher
- Springer Nature
- Number of pages
- 4
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000589685200001
- Scopus ID
- 2-s2.0-85062303650
- Other Identifier
- 991021902596004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Mechanical
- Materials Science, Characterization & Testing
- Materials Science, Multidisciplinary
- Mechanics