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Related Experiment Video

Updated: Jun 28, 2026

Sample Preparation in Quartz Crystal Microbalance Measurements of Protein Adsorption and Polymer Mechanics

Sample Preparation in Quartz Crystal Microbalance Measurements of Protein Adsorption and Polymer Mechanics

Published on: January 22, 2020

Viscoelastic parameter estimation based on spectral analysis.

H Eskandari¹, S E Salcudean, R Rohling

¹Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|November 7, 2008

Summary

This summary is machine-generated.

This study presents a novel method for estimating tissue relaxation times using transfer function phase from strain measurements. This technique accurately distinguishes materials by combining elasticity and relaxation time, validated with simulations and phantom experiments.

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Studying Large Amplitude Oscillatory Shear Response of Soft Materials

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Published on: April 25, 2019

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Last Updated: Jun 28, 2026

Sample Preparation in Quartz Crystal Microbalance Measurements of Protein Adsorption and Polymer Mechanics

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Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

Area of Science:

Biomedical Engineering
Materials Science
Medical Imaging

Background:

Accurate characterization of tissue viscoelastic properties is crucial for medical diagnostics.
Existing methods for estimating relaxation time distribution can be limited in robustness and applicability.

Purpose of the Study:

To introduce a novel technique for robust estimation of relaxation-time distribution in biological tissues.
To validate the technique through computer simulations and experimental measurements.

Main Methods:

Utilized the phase of transfer functions derived from time-series strain measurements at multiple locations.
Developed computer simulations with noise to assess feasibility.
Constructed an experimental apparatus and software for validation.
Tested algorithms on gelatin and polyvinyl alcohol sponge phantoms with varying viscoelastic properties.

Main Results:

Computer simulations demonstrated the feasibility of the proposed technique.
Experimental results using tissue-mimicking phantoms showed successful estimation of tissue parameters.
Elasticity and relaxation time served as complementary features to differentiate materials.
Estimated relaxation times were consistent with rheometry measurements.

Conclusions:

The developed technique provides a robust method for estimating relaxation-time distribution in tissues.
Combining elasticity and relaxation time enhances the delineation of material mechanical properties.
The experimental setup functions as both a rheometer and a vibro-elastography imaging device.