LARGE-AREA ULTRASOUND CONTACT IMAGING

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus for ultrasonic contact imaging.

SOLUTION: A thin-film transistor (TFT) array is deposited on a substrate. A receiver having a plurality of receiver elements is deposited on the TFT array to receive a reception signal. A transmitter adjacent to the receiver generates a transmission signal at an ultrasonic frequency. The transmission signal is reflected from a surface to produce a reflected signal. The reception signal is a superposition of the transmission signal and the reflected signal as a result of interference. The reception signal is representative of differences in acoustic impedances across the surface.

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