Rajiv Gupta1 Green Way, Wayland, MA 01778

6370480, Apr 9, 2002

May 21, 1999

09/316011

Rajiv Gupta - New York NY
Yibin Zheng - Rexford NY
Christopher James Dailey - Sommerville SC

General Electric Company - Schenectady NY

G01B 7008

702 39, 738664

An analysis system and method provide for quantitatively evaluating image quality characteristics of an ultrasound imaging machine that evaluates at least one image representation of a standard phantom acquired by the image machine. The machine under test by comparing acquired parameters with prestored values, and returning a determined set of image quality indices, along with a single index representing an arithmetic combination of all other image quality indices, which indicate the accuracy of the test image relative to a âgold standardâ that has been pre-established for the model of imaging machine under investigation. The system, which includes a computer-programmed set of instructions and data, optionally includes at least one standard phantom. The image quality indices, or metrics, quantitatively represent an evaluation of a test image using a set of relatively subjective criteria that include homogeneity, contrast, signal attenuation and penetration of depth, pin to background ratio in near and far-field, axial and lateral resolution, modulation transfer function, and geometric distortion, and axial and lateral linearity. These image quality indices are determined by specific algorithms and then combined to form an image health index.

6501849, Dec 31, 2002

Dec 29, 1999

09/474499

Rajiv Gupta - New York NY
Christopher James Daily - Ogden UT
Rasiklal Punjalal Shah - Latham NY
Valtino Xavier Afonso - DesPlaines IL

General Electric Company - Schenectady NY

G06K 900

382141, 382152, 382157

A system for performing image-based diagnosis of a machine includes a database containing a plurality of historical images taken from a plurality of machines, a diagnostic unit configured to diagnose a new artifact image from the machine and to communicate historical and non-historical images or data associated with the system to a remote facility. The plurality of historical images include a plurality of ideal images generated from the plurality of machines using all possible machine settings and a plurality of artifact images generated from the plurality of machines, each of the artifact images having known faults associated therewith and a corresponding corrective action for repairing the faults. The diagnostic unit includes a diagnostic image processor and a diagnostic fault isolator. The diagnostic image processor includes means for finding an ideal image from the plurality of historical images that most closely matches the new artifact image, means for assigning an artifact category to the new artifact image based on the matched ideal image, and means for extracting an artifact feature from the new artifact image according to the assigned category.

7644577, Jan 12, 2010

Oct 31, 2005

11/262605

Jan-Roger Linna - Boston MA, US
Rajiv Gupta - Glen Allen VA, US
Roberto O. Pellizzari - Groton MA, US

Philip Morris USA, Inc. - Richmond VA

F01N 3/00

60286, 60295, 60297, 60301, 60303, 239409, 239410, 2395853, 2395854

A reducing agent metering system for delivering reducing agent to a lean burn internal combustion engine. The reducing agent metering system includes a metering system housing, a system for metering vaporized reducing agent to the internal combustion engine, the system positioned within the metering system housing and a system for delivering an atomized stream of liquid reducing agent to the lean burn internal combustion engine, the system positioned within the metering system housing, wherein the reducing agent metering system is operable to transition from metering vaporized reducing agent to delivering an atomized stream of liquid reducing agent to the lean burn internal combustion engine.

7863897, Jan 4, 2011

Sep 8, 2008

12/206279

Rajiv Gupta - Wayland MA, US
Stephen E. Jones - Cleveland Heights OH, US

The General Hospital Corporation - Boston MA

G01V 3/00

324309, 324307

A system and method for determining the temporal resolution of a tomographic imaging device uses an apparatus to drive one or more dynamic phantoms composed of multiple materials. The apparatus is placed at or near the isocenter of the imaging device and the one or more phantoms are moved to produce a plurality of dynamic features, each having a specified frequency. The dynamic features are imaged with the device and the acquired image data corresponding to the dynamic features is analyzed to determine a temporal modulation transfer value at each of the known specified frequencies. The temporal resolution of the imaging device is determined using these temporal modulation transfer values.

8477906, Jul 2, 2013

Mar 5, 2008

12/529867

Theodore F. Morse - Little Compton RI, US
Rajiv Gupta - Wayland MA, US
Carson B. Roberts - Waltham MA, US
Robert D. Chivas - Boston MA, US

Trustees of Boston University - Boston MA
Corporate Sponsored Research and Licensing for Massachusetts General Hospital, Partners Healthcare System, Inc. - Boston MA

G01T 1/203
H05G 1/64

378 988, 25037009, 25037011

A bundle of drawn fibers that have X-ray scintillating unagglommerated nanocrystallite particles in plastic or glass cores of down to 0. 1 micron spacing and claddings of X-ray absorbing compounds in the cladding composition. Optional is a cover to the bundle that blocks light from leaving the bundle at the X-ray side while allowing X-rays to pass into the cores. To image the light exiting the fiber bundle at the sub-micron level, light expansion is preferable using either a lens system or a fiber bundle expander.

2006022, Oct 12, 2006

Jan 27, 2006

11/307231

Rajiv Gupta - Wayland MA, US
Steven Barrett - Cambridge, GB
Nevan Hanumara - Kingston RI, US
Jo-Anne Shepard - Dover MA, US
Alexander Slocum - Bow NH, US
Conor Walsh - Dublin, IE

A61B 19/00

606130000

Methods and devices are provided for guiding and inserting a tool into an object, such as tissue. In an exemplary embodiment, a guidance and insertion device is provided that can be remotely controlled to adjust an insertion trajectory of a tool, and to advance the tool into tissue to a desired penetration depth. The tool can be, for example, a biopsy device, a brachytherapy device, or a lumpectomy device. The device can be configured for use with an imaging apparatus, such as computed tomography (CT) images, to allow the device and tool to be operated while viewing the device positioned in relation to a target surgical site. The device can also be configured to be positioned directly on a patient, so as to passively compensate for respiratory chest motion, and it can include features to passively compensate for needle oscillation. In other exemplary embodiments, the device can be entirely disposable.

6115489, Sep 5, 2000

Sep 2, 1997

8/921959

Rajiv Gupta - New York NY
Christopher James Dailey - Mc Gill NV
Valtino Xavier Afonso - Des Plaines IL
Rasiklal Punjalal Shah - Latham NY

General Electric Company - Schenectady NY

G06K 900

382141

The present invention discloses a system and method for performing image-based diagnosis. In this invention, historical artifact images and corresponding actions for repairing the artifacts are acquired and stored in a database. The database of historical artifact images and corresponding actions is used to diagnose an incoming artifact image having an unknown fault.

6154518, Nov 28, 2000

Nov 4, 1998

9/186029

Rajiv Gupta - New York NY

General Electric Company - Schenectady NY

G01N 2304

378 62

Locally-adaptive, sub-voxel registration of two volumetric data sets is performed by generating match points and then, using the match points, generating a locally-adaptive image-to-warp transformation. Generation of the match points is accelerated by generating a volume hierarchy and then identifying a set of 3D points in the first volume for designation as interesting points. Interesting points in the first volume are then matched with their corresponding points in the second volume. After performing match point generation, points on a cubic grid in the first volume are matched to the corresponding match points in the second volume by resampling the match points on the cubic grid in the first volume. After a grid of match points has been identified, the displacement (dx, dy, dz) that should be added to each cubic grid point in the first volume to identify the coordinates of the corresponding point in the second volume is determined. Using the displacements in the match points, a warping transformation function that specifies the displacement for each point (x, y, z) in the first volume is determined.