Chuanyong Y Bai

US Patent:

6928142, Aug 9, 2005

Filed:

Oct 18, 2002

Appl. No.:

10/274353

Inventors:

Lingxiong Shao - Saratoga CA, US
Chuanyong Bai - Mountain View CA, US
Mary K. Durbin - San Jose CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G01N023/04
G01T001/161
A61B005/05

US Classification:

378 63, 378197, 378205, 25036304, 600407, 600425, 600436

Abstract:

A diagnostic imaging system () comprising a computer workstation () for controlling the imaging system, interfacing with an operator and generating images. A coordinate system () is in data communication with the computer workstation. The coordinate system () is adapted to describe relative position of components in the diagnostic imaging system (). A subject support () is describable within the coordinate system and an X-ray sub-system () is positionable around the subject support (). Position sensors () are operatively connected to the x-ray sub-system () and they provide signals to the workstation () indicative of the position of components of the x-ray sub-system () within the space represented by the coordinate system. A nuclear camera sub-system () is positionable around the subject support (). Position sensors () are operatively connected to the nuclear camera sub-system () and provide signals to the workstation () indicative of position of components of the nuclear camera sub-system within the coordinate system.

US Patent:

7569827, Aug 4, 2009

Filed:

Aug 16, 2006

Appl. No.:

11/506152

Inventors:

Chuanyong Bai - Poway CA, US
Richard L. Conwell - Del Mar CA, US

International Classification:

G01T 1/166
G06K 9/00

US Classification:

25036304, 25036302, 25036307, 25036309, 382131

Abstract:

An image from a gamma camera, e. g. , from a radiopharmaceutical, is corrected for scatter. The image is approximated by estimating the center of the organ and supposing a Guassian response that is scatter-corrected.

US Patent:

7668288, Feb 23, 2010

Filed:

Aug 15, 2006

Appl. No.:

11/505233

Inventors:

Richard L. Conwell - Del Mar CA, US
Chuanyong Bai - Poway CA, US

Assignee:

Digirad Corporation - Poway CA

International Classification:

G01N 23/00

US Classification:

378 16, 378 8

Abstract:

A medical imaging system, e. g. , a computed tomography system includes at least one radiation detector that is relatively rotatable with respect to an object of interest. The angular range is divided into discrete continuous acquisition ranges and unsampled angular ranges, wherein the discrete continuous acquisition ranges are separated by unsampled angular ranges.

US Patent:

7683341, Mar 23, 2010

Filed:

Nov 6, 2007

Appl. No.:

11/935863

Inventors:

Chuanyong Bai - Poway CA, US
Richard Conwell - Del Mar CA, US

Assignee:

Digirad Corporation - Poway CA

International Classification:

G01J 1/42

US Classification:

250393

Abstract:

A large field of view projection image is obtained and a small field of view projection image is obtained. The two images are normalized, to take into account the difference between the count data between the images, and the way the images represent data. The large field of view image does not include truncation errors that are present in the small field of view image and therefore is stitched together with the smaller field of view image to use the improved data within the small field of view image with the truncation reduction enabled by the larger field of view image.

US Patent:

8362438, Jan 29, 2013

Filed:

Aug 27, 2010

Appl. No.:

12/870239

Inventors:

Chuanyong Bai - Poway CA, US
Richard Louis Conwell - Del Mar CA, US

Assignee:

Digirad Corporation - Poway CA

International Classification:

H01L 27/146

US Classification:

25037009

Abstract:

Two different collimation geometries are interleaved. Each collimation geometry samples a transaxial slice through the object being imaged. The even slices are of the same fan-beam geometry as the central head, but the odd slices are of different collimation geometry. Each slice covers an axial range that is the same as the pixel size of the solid-state detector, and aligns with the corresponding pixels in the axial direction.

US Patent:

20070092144, Apr 26, 2007

Filed:

Aug 17, 2006

Appl. No.:

11/506607

Inventors:

Chuanyong Bai - Poway CA, US
Joel Kindem - San Diego CA, US
Jeff Gordon - San Diego CA, US
Richard Conwell - Del Mar CA, US
Hetal Babla - Poway CA, US

International Classification:

G06K 9/36
G06K 9/00

US Classification:

382232000, 382128000

Abstract:

Medical imaging information is randomly resampled into the new resampled form. The random resampling can maintain the random nature of the information, and can avoid count loss.

US Patent:

20120296201, Nov 22, 2012

Filed:

Apr 25, 2012

Appl. No.:

13/455272

Inventors:

Chuanyong Bai - Poway CA, US

Assignee:

DIGIRAD CORPORATION - Poway CA

International Classification:

A61B 6/00
A61B 10/02

US Classification:

600424

Abstract:

First and second gamma radiation detector heads are oriented to image an area of a subject. The area of said subject is completely within a field of view that is defined between the first and second gamma radiation heads. Focal points of each of the first and second gamma radiation heads are also within an area defined between the first and second gamma radiation heads. A computer is programmed to receive image information from both the first gamma radiation detector head and the second gamma radiation detector head, and operating to use information from both the first gamma radiation detector head and the second gamma radiation detector head, as well as to use information indicative of a distance between the first gamma radiation detector head and the second gamma radiation detector head, to determine a location of an item of interest in the subject and between the first gamma radiation detector head and the second gamma radiation detector head, by calculating using information about similar triangles formed from known positions of the first gamma radiation detector head and the second gamma radiation detector head, and the information.

US Patent:

6381349, Apr 30, 2002

Filed:

Nov 10, 1998

Appl. No.:

09/189686

Inventors:

Gengsheng Lawrence Zeng - Salt Lake City UT
Chuanyong Bai - Salt Lake City UT
Grant T. Gullberg - Salt Lake City UT

Assignee:

The University of Utah - Salt Lake City UT

International Classification:

G06K 900

US Classification:

382128

Abstract:

A method of modeling 3D first-order scatter, non-uniform attenuation, and 3D system geometric point response in an ML-EM algorithm to reconstruction SPECT data is provided. It includes performing an initial slice-to-slice blurring operation ( ) on a volume of estimated emission source data. The volume of estimated emission source data is represented by a 3D array of voxels. A voxel-by-voxel multiplying ( ) of the results from the initial slice-to-slice blurring operation ( ) by a volume of attenuation coefficients yields a volume of effective scatter source data ( ). The volume of effective scatter source data ( ) is voxel-by-voxel added ( ) to the volume of estimated emission source data to produce a volume of combined estimated emission and scatter source data. Finally, a secondary slice-to-slice blurring operation ( ) is performed on the volume of combined estimated emission and scatter source data.