ULTRASONIC FOCUSING TRANSDUCER

摘要

An ultrasonic focusing transducer includes a spherical shell (30) which is provided with a round hole (40) on the spherical cap, for the installation of an ultrasonic detector. A ring piece of piezoelectric ceramic (10) which adopts a circular loop configuration is adaptively provided in the inner side of the spherical shell (30), and the interior circle of the circular loop has the same size with the round hole (40). A plurality of petal pieces of piezoelectric ceramic (20) are respectively provided in the inner side of the spherical shell (30), and surround the outer circumference of the ring piece of piezoelectric ceramic (10). The ring piece of piezoelectric ceramic (10) and each petal piece of piezoelectric ceramic (20) are connected with the control device of ultrasonic focusing transducer respectively. The ultrasonic focusing transducer can independently control the ring piece of piezoelectric ceramic (10) and each petal piece of piezoelectric ceramic (20) respectively to produce the ultrasonic wave. Under the circumstances of guaranteeing the therapeutic dose, rays are more dispersed when focused, and the therapeutic dose can also be selectively adjusted, which can not influence the ablation of the focus of disease.