A Two-Dimensional Piezoelectric Matrix for Transcranial Ultrasonic Diagnostics Systems

摘要

Fundamentally new two-dimensional matrix-type sensors with high numbers of receiving elements are needed to create ultrasonic systems for the transcranial diagnostics of brain structures. This need is due to the two-dimensional curvature of cranial bones and their lamination, which greatly refract acoustic waves. The use of traditional linear US sensors for such diagnostics is problematic since an acoustic beam reflected off any structure cannot enter a linear receiver due to refraction effects. A way of designing twodimensional matrix sensors with built-in signal commutators based on charge coupling devices is considered in this work. It is shown that this a solution allows us to create receiver sensors with an unlimited number of elements, high speed, and broad dynamic range. Results from experimental studies of such a hybrid device are presented.