Giubilei, G., Sarafianou, M., Sze Wai Choong, D., Jian Goh, D., & Koh, Y. (2025). A Novel Localized Coherence Rule Delay-and-Multiply Algorithm Toward Long-Range Ultrasound Imaging With Narrow Field-of-View pMUTs. IEEE Sensors Journal, 25(10), 16830–16845. https://doi.org/10.1109/jsen.2025.3557576
Abstract:
This work proposes an innovative signal post-processing algorithm for long-range ultrasound imaging by using a narrow Field-of-View (narrow-FoV) Lead Zirconate Titanate (PZT) piezoelectric Micromachined
Utrasonic Transducer (pMUT) array. Two 3x3 mm2 dies of a 1D-array pMUT, whose resonant frequency
is 6.5 MHz, consisting of 18-channels, were employed for this demonstration. The entire system has
18-channels by electrically combining two columns of pMUT membranes as one to increase the transmission
power with the cost of narrowing FoV. In this work, experimental testing using single and multiple 5 mm
diameter spherical reflectors at various arrangements was performed to validate the 2D imaging capabilities
of the developed pMUT array with the proposed image reconstruction algorithm achieving a 1.5 mm lateral
resolution.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the Agency for Science, Technology and Research - Piezo Specialty Lab-in-Fab 2.0
Grant Reference no. : I2301E0027