Method and apparatus for improving the performance of capacitive acoustic transducers using bias polarity control and multiple firings

摘要: Presented is a method of operating capacitive microfabricated ultrasonic transducer (cMUT) array with multiple firings varying bias voltage polarity patterns to improve its performance in imaging non-linear media, such as contrast agent or tissue harmonic imaging. Additionally, transducers incorporating the are provided. The cMUT operation and corresponding does not require pre-distortion phase inversion transmit signal can achieve an improvement elevation focus cMUT, compared that single firing achieve. Further, minimizes deleterious effects result from insulators being subjected high electric fields.