Ultrasonic transducers for medical diagnostic examination.

摘要

The ultrasonic wave transmitting and receiving portion (1) comprises a piezoelectric vibrator, acoustic impedance matching layer, and backing load, which are integrated in a piled layer. The vibrator and acoustic impedance matching layer are mechanically or electrically divided by a sound wave buffer (11) of silicone rubber. The transmitting and receiving portion is located in a containe (2) having an acoustic window of resin of acoustic impedance matching that of human tissue. The container is filled with ultrasonic wave propagating material (3). The lead wires (10a,b,c) are switchable by semiconductor devices in a signal processing and display apparatus in accordance with the mode to be displayed.