| 摘要 |
An ultrasonic probe which improves the directivity of the ultrasonic transmission beam by reducing the grating lobes at the time of transmitting ultrasonic waves. An ultrasonic probe 1 comprising a plurality of transducers 2 for transmitting ultrasonic waves and for receiving the reflected echoes thereof, and having a backing member 3 formed on the back surfaces of said transducers 2 as well as an acoustic matching layer and an acoustic lens formed on the front surfaces of said transducers, wherein the transducers 2 are formed in the shape of a predetermined small block and are arranged in many number in a spherical shape on the front surface of the backing member 3 formed in a spherical surface protruding in a semicircular manner. By applying the transmission signals which are in phase to the number of the transducers 2 to drive them, the sound pressure of the transmitted ultrasonic waves uniformly propagate in all directions, establishing a transmission from a point source of sound. By reducing the grating lobes at the time of transmitting ultrasonic waves, furthermore, the directivity of the ultrasonic transmission beam is improved.
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