Strain and mechanical behavior measurements of soft tissues with digital speckle method

Soft tissues of the body are composite, typically being made up of collagen and elastin fibers with high water contents. The strain measurement in soft tissues has proven to be a difficult task. The digital speckle method, combined with the image processing technique, has many advantages such as ful...

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Bibliographic Details
Published in:Journal of Biomedical Optics 2005-05, Vol.10 (3), p.034021-034027
Main Authors: Zhang, J, Jin, G. C, Meng, L. B, Jian, L. H, Wang, A. Y, Lu, S. B
Format: Article
Language:English
Subjects:
Animals
Biomechanical Phenomena - instrumentation
Biomechanical Phenomena - methods
Cartilage, Articular - cytology
Cartilage, Articular - physiology
digital speckle correlation method
Elasticity
electric speckle pattern interferometry
Equipment Design
Equipment Failure Analysis
In Vitro Techniques
Interferometry - instrumentation
Interferometry - methods
Physical Stimulation - instrumentation
Physical Stimulation - methods
Rabbits
Signal Processing, Computer-Assisted - instrumentation
smart sensor
soft tissue
Stress, Mechanical
Swine
Tensile Strength - physiology
time sequence
Vena Cava, Inferior - cytology
Vena Cava, Inferior - physiology
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Summary:Soft tissues of the body are composite, typically being made up of collagen and elastin fibers with high water contents. The strain measurement in soft tissues has proven to be a difficult task. The digital speckle method, combined with the image processing technique, has many advantages such as full field, noncontact, and real time. We focus on the use of an improved digital speckle correlation method (DSCM) and time-sequence electric speckle pattern interferometry (TSESPI) to noninvasively obtain continual strain measurements on cartilage and vessel tissues. Monoaxial tensile experiments are well designed and performed under constant temperature and the necessary humidity with smart sensors. Mechanical behaviors such as the tensile modulus and Poisson ratio of specimens are extracted based on the deformation information. A comparison of the advantages and the disadvantages of these techniques as well as some problems concerning strain measurements in soft tissues are also discussed. ©
ISSN:1083-3668
1560-2281
DOI:10.1117/1.1895185