Design and modeling of micro tactile sensor with three contact tips for self-compensation of contact error in soft tissue elasticity measurement

2015 ◽  
Vol 10 ◽  
pp. S144-S150 ◽  
Author(s):  
Ahmed Fouly ◽  
Mohamed N. A. Nasr ◽  
Ahmed M. R. Fath El Bab ◽  
A. A. Abouelsoud
Keyword(s):  
Soft Tissue ◽  
Tactile Sensor ◽  
Tissue Elasticity ◽  
Elasticity Measurement

Numerical Analysis of Elasticity Measurement of Soft Tissues via a 2D Distributed-Deflection Sensor: Significance of Tissue Parameters

2017 ◽  
Author(s):  
Yichao Yang ◽  
Arthur Weidemann ◽  
Charles Tison ◽  
Zhili Hao
Keyword(s):  
Theoretical Model ◽  
Soft Tissue ◽  
Soft Tissues ◽  
Numerical Study ◽  
Tissue Elasticity ◽  
Tissue Thickness ◽  
Compression Depth ◽  
Testing Method ◽  
Tissue Region ◽  
Elasticity Measurement

This paper reports on a numerical study on how the elasticity of soft tissue measured by a Compression-Relaxation (C-R) testing method via a two-dimensional (2D) distributed-deflection sensor varies with the tissue parameters (i.e., elasticity, thickness and in-plane dimension). The 2D sensor entails a polydimethylsiloxane (PDMS) micro structure embedded with a 3×3 sensing-plate/transducer array deposited on a Pyrex substrate. By moving the 2D sensor against a soft tissue region with a pre-defined compression pattern, the average deflection-depth slope of the deflections of the sensing-plate array versus the compression depth of the testing tissue is measured, and is translated to the measured tissue elasticity via a 1D theoretical model. Since the measured tissue elasticity arises from the tissue-sensor interaction, a numerical model, which includes the 2D sensor and a soft tissue underneath, is created in COMSOL to investigate the sensitivity of the measured tissue elasticity to tissue parameters including tissue thickness, in-plane dimension and elasticity. The numerical results reveal that the theoretical model causes a 20% overestimate on the inherent tissue elasticity in the range of 25kPa∼200kPa. The measured tissue elasticity does not vary with tissue thickness when tissue thickness is above 6mm. However, a relatively thin tissue leads to higher measured tissue elasticity. As long as the tissue in-plane dimension is larger than the sensor in-plane dimension, the measured tissue elasticity is insensitive to the tissue in-plane dimension.

scholarly journals Micro machined tactile sensor for soft tissue compliance detection

2009 ◽  
Vol 1 (1) ◽  
pp. 84-87 ◽  
Author(s):  
A.M.R. Fath El Bab ◽  
K. Sugano ◽  
T. Tsuchiya ◽  
O. Tabata ◽  
M.E.H. Eltaib ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Tactile Sensor ◽  
Tissue Compliance

ROLE OF COLLAGEN HELICAL HIERARCHY IN SOFT TISSUE ELASTICITY

2012 ◽  
Vol 45 ◽  
pp. S587
Author(s):  
Amir K. Miri ◽  
Luc Mongeau
Keyword(s):  
Soft Tissue ◽  
Tissue Elasticity

Tissue Elasticity Estimation with Optical Coherence Elastography: Toward Mechanical Characterization of In Vivo Soft Tissue

2005 ◽  
Vol 33 (11) ◽  
pp. 1631-1639 ◽  
Author(s):  
Ahmad S. Khalil ◽  
Raymond C. Chan ◽  
Alexandra H. Chau ◽  
Brett E. Bouma ◽  
Mohammad R. Kaazempur Mofrad
Keyword(s):  
Soft Tissue ◽  
Mechanical Characterization ◽  
Optical Coherence ◽  
Tissue Elasticity
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