A spherical cap transducer is provided with at least one electrode formed as segments. The segments are selectively driven to provide asymmetrical ovoid effective radiation patterns for treatment of tissue with ultrasonic radiation....http://www.google.fr/patents/US6039689?utm_source=gb-gplus-shareBrevet US6039689 - Stripe electrode transducer for use with therapeutic ultrasonic radiation treatment
Stripe electrode transducer for use with therapeutic ultrasonic radiation ...
