Robert H Pedersen

US Patent:

20070194658, Aug 23, 2007

Filed:

Jul 13, 2006

Appl. No.:

11/486528

Inventors:

Jimin Zhang - Bellevue WA, US
David Perozek - Mercer Is WA, US
John Kook - Seattle WA, US
Ed Caldwell - Everett WA, US
Charles Emery - Issaquah WA, US
Robert Pedersen - Woodinville WA, US

International Classification:

H01L 41/09

US Classification:

310314000

Abstract:

An inflatable cuff having integrated ultrasound transducers is used to effect hemostasis of deep bleeding wounds in limbs. The cuff includes a chamber defined by a bladder or a series of dams into which a fluid may be introduced and pressurized. The pressure of the fluid stops or slows bleeding while high intensity focused ultrasound is applied to effect hemostasis. The fluid may also serve as an acoustic couplant between the limb and the ultrasound transducers. The transducers may be electrostrictive transducers. Diodes may be used to reduce parallel capacitive loading in the transducer array. Bypass capacitors using the electrostrictive material may also be used.

US Patent:

20070213616, Sep 13, 2007

Filed:

Oct 19, 2006

Appl. No.:

11/583656

Inventors:

Thomas Anderson - Redmond WA, US
Charles Emery - Issaquah WA, US
Margo Gisselberg - Lynnwood WA, US
John Kook - Seattle WA, US
Larry Kulesa - Bothell WA, US
Robert Pedersen - Woodinville WA, US
David Perozek - Mercer Island WA, US
K. Sekins - Yarrow Point WA, US
Xiao Zhao - Redmond WA, US
Jimin Zhang - Bellevue WA, US

International Classification:

A61B 8/00

US Classification:

600448000

Abstract:

A targeting catheter is used to locate an arteriotomy, such as is formed during a femoral artery catheterization procedure. The targeting catheter includes one or more targeting aids, such as an inflatable balloon or sensor (e.g., Doppler or temperature sensor), to locate the arteriotomy. The targeting aid may be positioned at the arteriotomy. An ultrasonic beacon on the catheter may then be located relative to a therapeutic ultrasonic applicator (e.g., by using acoustic time-of-flight) so that the focus of ultrasonic energy from the applicator can be aligned with the arteriotomy.

US Patent:

20140018708, Jan 16, 2014

Filed:

Jul 16, 2013

Appl. No.:

13/943747

Inventors:

Jessica E. Parsons - Seattle WA, US
Robert H. Pedersen - Woodinville WA, US
Tim Etchells - Kenmore WA, US
Gregory Paul Darlington - Snohomish WA, US
Michael P.H. Lau - Edmonds WA, US
Jens Ulrich Quistgaard - Seattle WA, US

International Classification:

A61N 7/00

US Classification:

601 2

Abstract:

A system and method for providing real-time, image-guided high intensity focused ultrasound (HIFU) targeting and treatment of tissue. In one embodiment, the system includes an HIFU applicator and a user interface with a touchscreen display for three-dimensional visualization of the tissue. Image frames displayed on the user interface depict real-time images of the tissue, including an image parallel to a feature of the applicator and an image orthogonal to the parallel image. Reference lines may be sketched using the touchscreen and displayed on the image frames. In one embodiment, tissue boundaries are detected and marked on the image frames, either by the user or automatically by the system. In another embodiment, the user interface includes a footswitch for the user to interact with the system. In another embodiment, the system includes an ultrasound imaging component configured to undock from the system for use as a stand-alone ultrasound imaging device.

US Patent:

45357803, Aug 20, 1985

Filed:

Nov 7, 1984

Appl. No.:

6/669136

Inventors:

David Gur - Pittsburgh PA
John M. Herron - Pittsburgh PA
Robert H. Pedersen - Milwaukee WI

Assignee:

General Electric Company - Milwaukee WI

International Classification:

A61B 600

US Classification:

128659

Abstract:

Apparatus for measuring xenon concentration in xenon cerebral blood-flow studies operates under the control of a microprocessor which is used to monitor the patient's breathing cycle and to control a sampling pump in order to assure that only end-tidal gas is sampled. A xenon gas mixture is delivered to a patient by means of a mask assembly. At the end of each exhale cycle, the patient's end-tidal gas is held in a chamber on the exhale side of the mask assembly. At the start of the next inhale cycle, the microprocessor activates the sampling pump which draws end-tidal gas into a thermal conductivity detector. The output of the detector is transmitted through an A/D converter and the resultant value stored in the microprocessor memory along with the time of the sample. At the completion of a CT scan series, the accumulated data in the microprocessor is transferred to the CT-system-housed computer to be used in the reconstruction of cerebral blood-flow images using conventional techniques.

US Patent:

47278862, Mar 1, 1988

Filed:

Mar 27, 1987

Appl. No.:

7/031191

Inventors:

John E. Conrardy - Milwaukee WI
Bruce J. Fiorani - New Berlin WI
Robert H. Pedersen - Milwaukee WI
Mark P. Steinert - New Berlin WI

Assignee:

General Electric Company - Milwaukee WI

International Classification:

A61B 508

US Classification:

128725

Abstract:

Apparatus for detecting and indicating the commencement of inhalation by a patient under test includes a housing through which a gas flow due to the inhalation is directed. A light source and a light receptor positioned adjacent to transparent portions of the housing define a light path between them which transversely intersects the gas flow, the receptor being adapted to provide an output signal in response to incident light from the source. A movably positioned vane mounted inside the housing and normally biased to a position substantially clear of the light path, moves to a position progressively blocking the light path upon commencement of gas flow due to inhalation. Means responsive to a change in the receptor output signal resulting from blockage of the light path provides indication of the flow due to the inhalation commencement.

US Patent:

59161680, Jun 29, 1999

Filed:

May 29, 1997

Appl. No.:

8/858172

Inventors:

Robert H. Pedersen - Woodinville WA
Patrick Rene Pesque - Bothell WA

Assignee:

Advanced Technology Laboratories, Inc. - Bothell WA

International Classification:

A61B 800

US Classification:

600443

Abstract:

A three dimensional M-mode imaging system and techniques are described for acquiring and forming three dimensional ultrasonic M-mode images from ultrasonic data acquired over time from a stationary scanhead. The resultant images exhibit two spatial dimensions and one temporal dimension.

US Patent:

51776979, Jan 5, 1993

Filed:

Aug 31, 1990

Appl. No.:

7/576340

Inventors:

Paul C. Schanen - Waukesha WI
Robert H. Pedersen - Woodinville WA
Kishore C. Acharya - Brookfield WI

Assignee:

General Electric Company - Milwaukee WI

International Classification:

H03M 106
H03M 110

US Classification:

36457104

Abstract:

An autozeroing apparatus is disclosed for correcting the offset error in a computerized axial tomography (CAT) scanner data acquisition subsystem (DAS). The DAS includes a floating point amplifier for applying discrete amplification factors, or gain range segments, to an analog input before conversion to digital in an A/D converter. A digital autozero circuit is connected to the output of the A/D converter and adds a digital offset value to each A/D converter sample during data acquisition to correct for the net offset errors throughout the DAS. Separate storage latches are included for storing offset values corresponding to each gain range segment, and the offset value used for each sample correction corresponds to the gain range segment used for that sample. During an autozero reference interval, a reference voltage is applied to the DAS and the offset values are updated so as to force the corrected A/D converter output to agree with the reference voltage.

US Patent:

61265993, Oct 3, 2000

Filed:

Jun 17, 1999

Appl. No.:

9/335159

Inventors:

James R. Jago - Seattle WA
Robert H. Pedersen - Woodinville WA

Assignee:

ATL Ultrasound, Inc. - Bothell WA

International Classification:

A61B 800

US Classification:

600437

Abstract:

An ultrasonic diagnostic imaging system produces spatially compounded images by combining component frames acquired from different look directions. In a first embodiment, the oldest component frame used to form a spatially compounded image is subtracted from the spatially compounded image to produce a partially summed image, and a newly acquired frame is added to the partially summed image to form a new spatially compounded image. In a second embodiment, different groups of component frames are concurrently summed to form multiple spatially compounded images simultaneously. The display alternates between the display of the simultaneously produced spatially compounded images.