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Proceedings Paper

Strain and mechanical behavior measurements of soft tissues with digital speckle method
Author(s): Jun Zhang; Guan Chang Jin; Li Bo Meng; Long Hui Jian; Ai Yuan Wang; Shi Bi Lu
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Paper Abstract

Soft tissues of human and animals are composite, typically being made up of the collagen and elastin fibres with high water contents. The strain measurement in soft tissues has proven to be a difficult task. Digital Speckle Method, an optical measurement method combining with computer image processing technique, has many advantages like full-field, non-contact and high measuring accuracy. Two main techniques, the Digital Speckle Correlation Method (DSCM) and Electric Speckle Pattern Interferometry (ESPI), have been developed and applied on many aspects. Using these two methods, the strain measurements caused by the continual deformation of soft tissues under pure tensile loading are completed and presented in this paper. Experiments are performed under the conditions of constant temperature and necessitate humidity with smart sensor. After capture a series of speckle patterns in continual time period, the displacement and strain distribution of soft tissues can be obtained by two improved techniques (Improved DSCM and Time-Sequence ESPI). Thus, the tensile modulus and Poisson ratio of soft tissues will be extracted.

Paper Details

Date Published: 27 August 2003
PDF: 11 pages
Proc. SPIE 4961, Laser-Tissue Interaction XIV, (27 August 2003); doi: 10.1117/12.477908
Show Author Affiliations
Jun Zhang, Tsinghua Univ. (China)
Guan Chang Jin, Tsinghua Univ. (China)
Li Bo Meng, Tsinghua Univ. (China)
Long Hui Jian, Tsinghua Univ. (China)
Ai Yuan Wang, General Hospital of Chinese PLA (China)
Shi Bi Lu, General Hospital of Chinese PLA (China)

Published in SPIE Proceedings Vol. 4961:
Laser-Tissue Interaction XIV
Donald Dean Duncan; Steven L. Jacques; Sean J. Kirkpatrick; Andres Kriete, Editor(s)

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