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Related Experiment Video

Updated: Jan 28, 2026

Stiffness Measurement of Soft Silicone Substrates for Mechanobiology Studies Using a Widefield Fluorescence Microscope
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A Wearable Ultrasound Sensing System for Soft Tissue Stiffness Detection: A Feasibility Study.

Guangshuai Bao1, Tongyi Xu1, Xiaoyu Li1

  • 1Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

Biosensors
|January 27, 2026
PubMed
Summary

This study developed a wearable ultrasonic system for objective tissue stiffness measurement. It uses time-of-flight differences to monitor stiffness in real-time, aiding clinical decisions.

Keywords:
ToF differencebiomechanical propertieslesion identificationreal-time monitoringsoft tissue stiffnessultrasonic indentation testingwearable ultrasound sensing

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Ultrasound Technology

Background:

  • Manual palpation for soft tissue stiffness assessment is subjective and unreliable.
  • Objective methods are needed for accurate pathological tissue stiffness evaluation.
  • Existing techniques may lack real-time, non-invasive monitoring capabilities.

Purpose of the Study:

  • To develop an objective method for measuring tissue stiffness using ultrasound.
  • To create a wearable sensing system for real-time tissue stiffness monitoring.
  • To establish a quantitative framework supporting clinical diagnostics.

Main Methods:

  • Utilized ultrasonic transducers to measure time-of-flight (ToF) difference in ultrasound signals.
  • Developed a correlation model linking ToF difference to tissue stiffness.
  • Integrated ultrasonic transducers into a wearable system with pneumatic pressure control.

Main Results:

  • Successfully established a correlation model between ToF difference and tissue stiffness.
  • Demonstrated real-time monitoring of stiffness variations in human muscles (biceps brachii, thigh, forearm) and simulated lesions.
  • Validated the system's ability to detect stiffness changes during muscle activity and simulated pathologies.

Conclusions:

  • The developed wearable ultrasonic system provides a quantitative and objective framework for tissue stiffness monitoring.
  • This technology offers potential for improved clinical diagnostic decision-making.
  • The system enables non-invasive, real-time assessment of tissue mechanical properties.