SYSTEMS AND METHODS FOR REDUCING SECONDARY HOT SPOTS IN A PHASED ARRAY FOCUSED ULTRASOUND SYSTEM

Title:

SYSTEMS AND METHODS FOR REDUCING SECONDARY HOT SPOTS IN A PHASED ARRAY FOCUSED ULTRASOUND SYSTEM

Document Type and Number:

WIPO Patent Application WO2001080708

Kind Code:

A3

Abstract:

Systems and methods for performing a therapeutic procedure using focused ultrasound include providing a piezoelectric transducer including a plurality of transducer elements (22), such as a concave concentric ring array or a linear array of transducer elements. Drive circuitry (14) is coupled to the transducer for providing drive signals to the transducer elements at one of a plurality of discrete RF frequencies. A controller (16) 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.

Inventors:

VITEK SHUKI
BRENNER NAAMA

Application Number:

PCT/IL2001/000339

Publication Date:

March 14, 2002

Filing Date:

April 12, 2001

Export Citation:

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Assignee:

TXSONICS LTD (IL)

International Classes:

A61B17/225; A61B18/00; A61N7/02; B06B1/02; G10K11/34; H01Q21/20; H04R3/00; H04R17/00; A61N7/00; (IPC1-7): A61B8/00

Foreign References:

US5694936A	1997-12-09
US6267734B1	2001-07-31

Other References: