Advances In Ultrasound Transducer Technologies for Portable Medical Imaging: A Comparative Review of Piezoelectric, CMUT, And Optical Approaches

Suhan Luo

doi:10.54097/vnaby125

Authors

Suhan Luo

DOI:

https://doi.org/10.54097/vnaby125

Keywords:

Ultrasound transducer; piezoelectric transducer; Capacitive Micromachined Ultrasonic Transducer (CMUT); Optical ultrasound probe; Handheld ultrasound device (HHUD).

Abstract

Ultrasonic imaging is a cornerstone of modern medical diagnostics. Although Piezoelectric Materials Ultrasound Transducers (PMUT) are well-established, their performance limitations—particularly in sensitivity and adaptability—become apparent as medical devices trend towards miniaturization and portability. In response, emerging technologies such as Capacitive Micromachined Ultrasonic Transducers (CMUT) and optical ultrasound transducers have emerged as promising alternatives. Optical ultrasound transduction, in particular, combines the high contrast of optical imaging with the deep penetration of ultrasound, representing a significant direction for future development. This review systematically compares three principal types of medical ultrasound probes: piezoelectric, CMUT, and optical. It elaborates on their fundamental operating principles, internal architectures, and respective advantages. A comparative analysis is presented to evaluate their performance, leading to a discussion on the future trajectory of ultrasound probe technology, with a specific focus on their integration into wearable and handheld devices. The ultimate goal of this review is to bridge the gap between novel transducer principles and practical clinical application, thereby contributing to the advancement of a new generation of portable diagnostic imaging.

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