James M Hossack

US Patent:

7621873, Nov 24, 2009

Filed:

Aug 17, 2005

Appl. No.:

11/206640

Inventors:

Neil Owen - Seattle WA, US
Michael R. Bailey - Seattle WA, US
James Hossack - Duvall WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

A61B 17/22

US Classification:

600459, 601 3, 601 2, 601 4, 310311, 310322, 310334, 600439

Abstract:

Interference in ultrasound imaging when used in connection with high intensity focused ultrasound (HIFU) is avoided by employing a synchronization signal to control the HIFU signal. Unless the timing of the HIFU transducer is controlled, its output will substantially overwhelm the signal produced by ultrasound imaging system and obscure the image it produces. The synchronization signal employed to control the HIFU transducer is obtained without requiring modification of the ultrasound imaging system. Signals corresponding to scattered ultrasound imaging waves are collected using either the HIFU transducer or a dedicated receiver. A synchronization processor manipulates the scattered ultrasound imaging signals to achieve the synchronization signal, which is then used to control the HIFU bursts so as to substantially reduce or eliminate HIFU interference in the ultrasound image. The synchronization processor can alternatively be implemented using a computing device or an application-specific circuit.

US Patent:

48880868, Dec 19, 1989

Filed:

Jun 9, 1988

Appl. No.:

7/204605

Inventors:

James M. Hossack - Seattle WA
Jeffrey E. Powers - Bainbridge WA
John K. Billings - Snohomish WA

Assignee:

Ultrasonic Arrays, Inc. - Woodinville WA

International Classification:

C23F 100
B44C 122
C03C 1500
C03C 2506

US Classification:

156639

Abstract:

Ultrasonic apparatus for use in detecting an object having a transducer. The transducer has an array of at least one element coupled directly into air. The apparatus also includes a transmitter which may be multi-channel, a receiver which may be multi-channel, a transmit receive switch, and a computer for causing operation of said transmit receive switch to cause sequential supplying of pulses of energy from the transmitter to the element or elements of the transducer and for receiving energy received by the transducer. The element or elements of the transducer are provided with a roughened surface to produce high frequency ultrasonic energy.

US Patent:

47697938, Sep 6, 1988

Filed:

Feb 12, 1986

Appl. No.:

6/828924

Inventors:

James N. Kniest - Edmonds WA
James M. Hossack - Redmond WA
Walter Lecoque - Baring WA

Assignee:

Ultrasonic Arrays, Inc. - Woodinville WA

International Classification:

G01S 966

US Classification:

367 99

Abstract:

An ultrasonic transducer and method for detecting the distance to an object using ultrasonic energy. The transducer includes a foil which creates ultrasonic energy. First and second reference surfaces are provided which are spaced between the transducer and the object. The two reference surfaces provide for immunity against temperature and positional changes.

US Patent:

46959866, Sep 22, 1987

Filed:

Mar 28, 1985

Appl. No.:

6/716988

Inventors:

James M. Hossack - Redmond WA

Assignee:

Ultrasonic Arrays, Inc. - Woodinville WA

International Classification:

H04R 102
H04R 3100

US Classification:

367140

Abstract:

Ultrasonic transducer assembly having a piston with a substantially planar surface formed of a conducting material. An insulating foil element having first and second surfaces overlying the substantially planar surface of the piston. The foil has a conducting layer carried by the first surface. A plurality of spaced apart support elements are disposed between the substantially planar surface of the piston and the second surface of the foil.

US Patent:

48872466, Dec 12, 1989

Filed:

Sep 15, 1983

Appl. No.:

6/532576

Inventors:

James M. Hossack - Seattle WA
Jeffry E. Powers - Bainbridge WA
John K. Billings - Snohomish WA

Assignee:

Ultrasonic Arrays, Inc. - Woodinville WA

International Classification:

H04R 2300

US Classification:

367140

Abstract:

Ultrasonic apparatus for use in detecting an object having a transducer. The transducer has an array of at least one element coupled directly into air. The apparatus also includes a transmitter which may be multi-channel, a receiver which may be multi-channel, a transmit receive switch, and a computer for causing operation of said transmit receive switch to cause sequential supplying of pulses of energy from the transmitter to the element or elements of the transducer and for receiving energy received by the transducer. The element or elements of the transducer are provided with a roughened surface to produce high frequency ultrasonic energy.