A Tactile Sensor for Ultrasound Imaging Systems.

Area of Science:

• Biomedical Engineering
• Materials Science
• Medical Imaging

Background:

• Ultrasound imaging quality is affected by probe contact pressure.
• Accurate pressure measurement is crucial for diagnostic procedures.
• Existing methods may lack precision or interfere with imaging.

Purpose of the Study:

• To develop and characterize a solid-state sensor array for measuring contact pressure distribution.
• To assess the sensor's impact on ultrasound imaging capabilities.
• To explore applications in medical diagnostics, particularly breast cancer screening.

Main Methods:

• Utilized the dielectrostriction mechanism for pressure sensing.
• Designed and fabricated a solid-state sensor array integrated into an ultrasound probe.
• Evaluated sensor performance, including overload tolerance, pressure measurement range, and ultrasound transmissivity.

Main Results:

• The prototype sensor array demonstrated high overload tolerance (>1 MPa).
• It accurately measures stress in the 0.14 to 10 kPa range.
• Ultrasound transmissivity loss was less than 3dB at 9 MHz, suitable for research.

Conclusions:

• The developed sensor array is promising for enhancing ultrasound-based medical diagnostics.
• It offers significant improvements for applications like breast cancer screening.
• Further optimization is needed for commercial viability, focusing on ultrasound transparency.