1 May 2005 Strain and mechanical behavior measurements of soft tissues with digital speckle method
Author Affiliations +
J. of Biomedical Optics, 10(3), 034021 (2005). doi:10.1117/1.1895185
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.
Jun Zhang, Guan-chang Jin, Li-Bo Meng, Longhui Jian, Aiyuan Wang, Shibi Lu, "Strain and mechanical behavior measurements of soft tissues with digital speckle method," Journal of Biomedical Optics 10(3), 034021 (1 May 2005). http://dx.doi.org/10.1117/1.1895185


Speckle pattern



Smart sensors

In vivo imaging



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