High frequency single crystal ultrasonic transducers up to 100 MHz for high resolution ophthalmic imaging applications

Abstract

As one of the most important and well established tools, ultrasound imaging provides noninvasive valuable diagnostic information, especially in the form of cross-sectional images of soft tissues. High frequencies are used directly to enable high resolution imaging to be of clinical benefit. As a result, high-frequency ultrasonic transducers with better resolution are needed. The difficulty of a high frequency transducer comes from preparation of a very thin layer of piezoelectric material with piezoelectric properties similar to bulk material. To date, although there are some reports about high frequency (80 to 100 MHz) ultrasonic transducers for eye imaging applications, but the focal length of those transducers are not enough and the images are not clear enough. In this work, high frequency transducers were prepared and used for eye imaging, high resolution of pig eye imaging were obtained.