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Journal of Biomedical Optics • Open Access

Strain and mechanical behavior measurements of soft tissues with digital speckle method
Author(s): Jun Zhang; Guan-chang Jin; Li-Bo Meng; Longhui Jian; Aiyuan Wang; Shibi Lu

Paper Abstract

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.

Paper Details

Date Published: 1 May 2005
PDF: 7 pages
J. Biomed. Opt. 10(3) 034021 doi: 10.1117/1.1895185
Published in: Journal of Biomedical Optics Volume 10, Issue 3
Show Author Affiliations
Jun Zhang, Tsinghua Univ. (United States)
Guan-chang Jin, Tsinghua Univ. (China)
Li-Bo Meng, Tsinghua Univ. (China)
Longhui Jian, Tsinghua Univ. (China)
Aiyuan Wang, General Hospital of Chinese PLA (China)
Shibi Lu, General Hospital of Chinese PLA (China)

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