Ultrasonic imaging using thin film transistor backplane

摘要

An embodiment is a method and apparatus for coherent ultrasonic imaging. A receiver array (220) has a plurality of receiver elements on a substrate (210) to detect in-phase and quadrature components of a received signal corresponding to a transmit signal. Each of the receiver elements includes a receiver transducer and a thin-film transistor (TFT) receiver circuit. The TFT receiver circuit includes a quadrature detector having a mixer to mix a received signal with a reference signal in a composite bias signal that is distributed across the plurality of receiver elements. A transmitter is acoustically coupled to the plurality of receiver elements to generate the transmit signal through an imaging medium.