Steven A Wolff

US Patent:

6618605, Sep 9, 2003

Filed:

Sep 8, 1999

Appl. No.:

09/391965

Inventors:

Steven D. Wolff - New York NY
Glenn S. Slavin - Rockville MD
Thomas K. F. Foo - Rockville MD

Assignee:

General Electric Company - Schenectady NY

International Classification:

A61B 5055

US Classification:

600410, 324306, 324307, 324309, 600419

Abstract:

A method and apparatus is disclosed for MR perfusion acquisition using a notched RF saturation pulse. In acquiring such MR data, a volume of slice locations is selected in which MR data is to be acquired. Each given slice is prepared with a notched RF saturation pulse which has a stop-band between a pair of pass-bands. The stop-band is designed to not affect the spins in the next slice in which MR data is to be acquired thereby effectively increasing the TI and increasing SNR and contrast simultaneously. Since the notched saturation pulse saturates all the spins outside of the notched stop-band, the blood in the ventricular chamber is effectively saturated so that the resulting perfusion images have blood pool suppression. Additionally, the use of a 90Â presaturation RF pulse provides a high level of immunity to the effects of arrhythmias or other variations in the patients heart rate. In order to keep the stop-band, or the notch, as wide as possible to overlap the boundaries of each slice location, it is preferable to interleave the acquisition of slice locations.

US Patent:

20050245809, Nov 3, 2005

Filed:

Apr 29, 2004

Appl. No.:

10/709365

Inventors:

Steven Wolff - New York NY, US
Thomas Foo - Baltimore MD, US

Assignee:

GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY COMPANY, LLC - Waukesha WI

International Classification:

A61B005/05

US Classification:

600410000

Abstract:

A method of generating a magnetic resonance image is provided, comprising subjecting a subject to a magnetic field. The subject comprised of a first tissue a second tissue and a third tissue. The method generates a first pulse sequence at a first TI time and generates a first image after the first pulse sequence. The first image has a first image first tissue magnitude, a first image second tissue magnitude, and a first image third tissue magnitude. The method then generates a second pulse sequence at a second TI time and generates a second image after the second pulse sequence. The second image has a second image first tissue magnitude, a second image second tissue magnitude, and a second image third tissue magnitude. Finally, the method generates a resultant image by combining the first image and the second image. The first image first tissue magnitude and the second image first tissue magnitude combine to form a positive resultant first tissue magnitude. The first image third tissue magnitude and the second image third tissue magnitude combine to form a negative resultant image third tissue magnitude.

US Patent:

20130066229, Mar 14, 2013

Filed:

Sep 11, 2011

Appl. No.:

13/229742

Inventors:

Steven D. Wolff - New York NY, US

Assignee:

NEOSOFT, LLC - Pewaukee WI

International Classification:

A61B 5/00

US Classification:

600561

Abstract:

Embodiments presented herein provide apparatus and methods for imaging-assisted determination of pressure gradient of blood flow across a valve orifice in a cardiovascular circuit without the use of velocity data measured at the valve orifice. An embodiment of the methods comprise creating an image of a valve orifice, creating a planimeter slice from the image of the valve orifice including a trace of the perimeter of the valve orifice, determining the valve orifice area by determining the area contained within the trace, determining the instantaneous flow rate through the valve orifice based on bulk flow data away from the valve, and determining the instantaneous pressure gradient across the valve orifice from the valve orifice area and the instantaneous flow rate.

US Patent:

20160015352, Jan 21, 2016

Filed:

Jul 16, 2015

Appl. No.:

14/801406

Inventors:

- Pewaukee WI, US
Steven Wolff - New York NY, US
Andrew Shaw - Wauwatosa WI, US
Mark S. Geisler - Franklin WI, US

International Classification:

A61B 6/00
A61B 5/00
A61B 5/0402
A61B 5/0205
A61B 5/055
A61B 6/03

Abstract:

A physiologic transmitter manages multiple communications between physiologic data acquisition devices attached to the patient and a receiver attached to an MRI or CT scanner. The transmitter's processor is able to generate waveform data and trigger data based upon the acquired physiologic data and transmit the data to a physiologic receiver attached to the host scanner. The receiver then is able to deliver a trigger signal to the host scanner for imaging the patient during a selected time frame based upon cardiac and/or respiratory cycles of the patient.

US Patent:

20160021219, Jan 21, 2016

Filed:

Jul 16, 2015

Appl. No.:

14/801433

Inventors:

- Pewaukee WI, US
Steven Wolff - New York NY, US
Andrew Shaw - Wauwatosa WI, US
Mark S. Geisler - Franklin WI, US

International Classification:

H04L 29/06
H04L 29/08
A61B 6/03
H04L 1/20
A61B 5/00
A61B 5/055

Abstract:

A physiologic transmitter manages multiple communications between physiologic data acquisition devices attached to the patient and a receiver attached to an MRI or CT scanner. The transmitter's processor is able to generate waveform data and trigger data based upon the acquired physiologic data and transmit the data to a physiologic receiver attached to the host scanner. The receiver then is able to deliver a trigger signal to the host scanner for imaging the patient during a selected time frame based upon cardiac and/or respiratory cycles of the patient.