06419648 is referenced by 313 patents.

System and methods for performing a therapeutic procedure using focused ultrasound include providing a piezoelectric transducer including a plurality of transducer elements, such as a concave concentric ring array or a liner array of transducer elements. Drive circuitry is coupled to the transducer for providing drive signals to the transducer elements at one of a plurality of discrete RF frequencies. A controller is coupled to the drive circuitry for periodically changing a frequency of the drive signals to one of the plurality of discrete frequencies, while controlling a phase component of the drive signals to maintain the focus of the transducer at a primary focal zone during a single sonication.

Title
Systems and methods for reducing secondary hot spots in a phased array focused ultrasound system
Application Number
9/556095
Publication Number
6419648 (B1)
Application Date
April 21, 2000
Publication Date
July 16, 2002
Inventor
Naama Brenner
Haifa
US
Shuki Vitek
Haifa
US
Agent
Lyon & Lyon
US
Assignee
Insightec TxSonics
US
IPC
A61N 7/02
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