John A Derbyshire, R Scott Hinks, Graham A Wright, Ross M Henkelman: Dynamic scan plane tracking using MR position monitoring. General Electric Company, Barry E Sammons, Christian G Cabou, Phyllis Y Price, September 7, 1999: US05947900 (46 worldwide citation)

An MRI system measures the movements of a subject during the acquisition of a series of NMR images and automatically updates the scan parameters such that the image plane or volume tracks the movement of the anatomy of interest. An array of tracking coils fasten to the subject and an NMR measurement ...

Warren D Foltz, Naeem Merchant, Graham A Wright: Measurement of coronary flow reserve with MR oximetry. Sunnybrook Health Science Centre, Christian G Cabou, Phyllis Y Price, Quarles & Brady, July 25, 2000: US06094591 (33 worldwide citation)

An MR oximetry measurement of % O.sub.2 employs a pulse sequence comprised of a T.sub.2 preparatory segment and an image data acquisition segment. The pulse sequence is used in methods for measuring coronary flow reserve and for measuring myocardial oxygen consumption.

Jeff Stainsby, Marshall S Sussman, Graham A Wright, Tzvi Goldman: Realtime MR scan prescription using physiological information. Sunnybrook & Women&apos s College Health Centre, Edward J Kondracki, Miles & Stockbridge P C, March 9, 2004: US06704593 (32 worldwide citation)

Realtime magnetic resonance imaging (MRI) uses cardiac and respiratory monitoring tools to avoid or minimize motion-induced image artifacts. A series of initial MR images are associated with the physiological data from the cardiac, respiratory, or other monitoring tools. The tools provide physiologi ...

Kevan J T Anderson, Graham A Wright: Catheter tracking with phase information. Sunnybrook Health Sciences Centre, Lynn C Schumacher, Hill & Schumacher, March 17, 2009: US07505808 (30 worldwide citation)

A method for determining the position and/or orientation of a catheter or other interventional access device or surgical probe using phase patterns in a magnetic resonance (MR) signal. In the method of the invention, global two-dimensional correlations are used to identify the phase pattern around i ...

Paul A Magnin, John W Goodnow, Russell W Bowden, Graham A Wright, Alexander J Dick, Perry Radau, John J Graham: Apparatus and method for rendering for display forward-looking image data. Leydig Voit & Mayer, November 3, 2009: US07612773 (27 worldwide citation)

An apparatus and method for rendering for display forward-looking image data. The apparatus includes rendering for display image data from a forward-looking conical section of tissue collected by an image data collection device, comprising a data input unit configured to receive the image data; and ...

Jae K Kim, Richard I Farb, Graham A Wright: Method for coordinating MR angiography scan with arrival of bolus at imaging site. Synnybrook Health Science Center, Jenkens & Gilchrist P C, May 15, 2001: US06233475 (19 worldwide citation)

An MRI method is provided for determining the arrival of selected contrast material at a target artery or other fluid-carrying vessel after injection of contrast material at a remote vascular site. By precisely knowing the arrival time, an additional MR angiography scan of the artery may be readily ...

Graham A Wright: Flow-independent magnetic resonance projection angiography. The Board of Trustees of the Leland Stanford Junior University, Henry K Woodward, December 10, 1991: US05070876 (19 worldwide citation)

The performance of current, flow-based sequences for imaging vasculature using MR is severely restricted in regions with inherently slow flow. We address this problem with a flow-independent imaging method. Specifically, we generate projection images of blood in the limbs while suppressing signals f ...

Graham A Wright: Method and apparatus for estimating oxygen saturation of blood using magnetic resonance. Board of Trustees of the Leland Stanford Junior University, Townsend and Townsend Khourie and Crew, August 10, 1993: US05233991 (12 worldwide citation)

The oxygen saturation of blood is determined by obtaining spin-spin relaxation time (T2.sub.b) of the fluid using magnetic resonance imaging techniques. A simplified model relates oxygen saturation of blood to measured spin-spin relaxation time. A pulse sequence is given for in vivo estimation of T2 ...

Marshall S Sussman, Naeem Merchant, Graham A Wright, Lawrence M White: Motion compensation for magnetic resonance imaging. University Health Network, Bereskin & Parr, July 3, 2007: US07239136 (4 worldwide citation)

An MRI system and method for acquiring motion-compensated MR image data of an object. The MRI system includes an MRI device for generating a uniform magnetic field through the object, magnetic field gradients for imaging a portion of the object and an RF excitation field for evoking NMR response sig ...

Marshall S Sussman, Graham A Wright, Charles H Cunningham: Magnetic resonance imaging using direct, continuous real-time imaging for motion compensation. Sunnybrook and Women&apos s Health Sciences Centre, Edward J Kondracki, Leslie L Coulson, Miles & Stockbridge PC, January 6, 2004: US06675034 (4 worldwide citation)

Magnetic resonance imaging (MRI) uses direct, continuous, unaliased, real-time imaging for motion compensation. Unaliased, real-time two dimensional (2D) images are acquired continuously of the anatomy of interest. The images are compared to at least one template to using a correlation coefficient t ...