Related Experiment Video
Updated: May 13, 2026
16:01
An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
Published on: September 24, 2017
FEA modeling of CMUT with membrane stand-off structures to enable selectable frequency-mode operation
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 28, 2013
Summary
This study presents a dual-frequency capacitive micro-machined ultrasonic transducer (CMUT) for both high-frequency imaging and low-frequency therapeutic applications. The novel hybrid design achieves significant negative pressures for microbubble rupture and broad bandwidths in both operating modes.
Area of Science:
- Biomedical Engineering
- Acoustic Transducer Technology
- Microelectromechanical Systems (MEMS)
Background:
- Development of a novel selectable, dual-frequency capacitive micro-machined ultrasonic transducer (CMUT).
- Utilized validated finite element analysis (FEA) for performance examination of the CMUT.
- Designed a hybrid CMUT incorporating stand-off structures for dual-frequency operation.
Discussion:
- Simulations demonstrated the hybrid device's capability to achieve peak negative pressures exceeding 190 kPa in low-frequency mode (2.1 MHz), sufficient for microbubble rupture.
- The low-frequency mode exhibited a wide bandwidth of 93%.
- High-frequency mode operation (44.1 MHz) generated a peak negative pressure of 247 kPa with a -6-dB fractional bandwidth of 42%.
Key Insights:
- The hybrid CMUT design enables selectable dual-frequency operation for diverse applications.
- Achieved significant acoustic pressures for therapeutic effects (microbubble rupture) and high-frequency imaging.
- Demonstrated broad bandwidths in both low-frequency (2.1 MHz) and high-frequency (44.1 MHz) modes.
Outlook:
- Potential for integration into advanced medical imaging systems.
- Further research could explore therapeutic applications leveraging the low-frequency rupture capabilities.
- Optimization of the hybrid design for enhanced performance and efficiency in both modes.
