A Low-Cost Laser Interferometric Elastography System for Skin Elasticity Measurement
Asha Parmar1, Shantanu Chauhan1, Sora Alghziwatalkhawaldh1
1Department of Electrical and Computer Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada.
Bioengineering (Basel, Switzerland)
|May 4, 2026
Summary
A simplified laser interferometric elastography (LIE) system uses a single photodetector and narrow linewidth laser to measure mechanical displacements. This cost-effective method enables precise elasticity mapping in biological samples.
Area of Science:
- Biomedical Optics
- Acoustic Physics
- Materials Science
Background:
- Laser interferometric elastography (LIE) traditionally requires complex optical setups.
- Measuring mechanical properties of biological tissues is crucial for diagnostics.
- Surface acoustic waves (SAWs) are sensitive to material stiffness.
Purpose of the Study:
- To develop a simplified and cost-effective laser interferometric elastography (LIE) system.
- To measure mechanical displacements induced by surface acoustic waves (SAWs).
- To enable practical elasticity mapping in biological samples.
Main Methods:
- Utilized a narrow linewidth laser and a single photodetector.
- Generated SAWs using an electrically driven piezoelectric transducer.
- Analyzed phase delay of the interference signal to determine displacement.
Main Results:
- Successfully measured mechanical displacements without complex interferometers.
- Demonstrated a compact and cost-effective platform for LIE.
- Achieved quantitative assessment of mechanical properties through controlled excitation and phase-resolved signal collection.
Conclusions:
- The simplified LIE system offers a practical solution for elasticity mapping.
- Reduced optical hardware requirements make the system accessible for various applications.
- This technology holds potential for real-world biomedical and material science applications.
