Dershan Shan Luo

US Patent:

7030382, Apr 18, 2006

Filed:

Jan 3, 2005

Appl. No.:

11/028270

Inventors:

John J. Williams - Hartland WI, US
Dershan Luo - Brookfield WI, US
Mark K. Limkeman - Brookfield WI, US
Michael J. Cook - Oconomowoc WI, US
David L. McDaniel - Dousman WI, US
Edwin L. Oswalt - Waukesha WI, US
Mark P. Feilen - Mukwonago WI, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01T 1/172
G01T 1/161

US Classification:

25036303, 25036309

Abstract:

A method of calibrating detectors in a detector ring of a PET scanner, each detector including a plurality of crystals, the PET scanner having a field of view, is disclosed. The method comprises collecting timing data indicative of coincidence events occurring between each pair of crystals within the field of view. The method further comprises determining a detector adjustment value for each detector, determining a crystal adjustment value for each crystal in each detector, and discretizing the crystal adjustment value for each crystal to produce a discretized crystal adjustment value for each crystal. Lastly, the method comprises calibrating each detector by applying the discretized crystal adjustment value for each crystal in each detector to the collected timing data indicative of coincidence events.

US Patent:

7787675, Aug 31, 2010

Filed:

Mar 17, 2006

Appl. No.:

11/384029

Inventors:

Tinsu Pan - Houston TX, US
Osama Mawlawi - Houston TX, US
Dershan Luo - Houston TX, US
Steven G. Kohlmyer - Lynnwood WA, US
Dennis P. Hurley - Waukesha WI, US

Assignee:

General Electric Company - Schenectady NY
Board Of Regents, The University of Texas System - Austin TX

International Classification:

G06K 9/00
A61B 6/00

US Classification:

382128, 378 4

Abstract:

Embodiments of the present invention provide the use of average CT (ACT) to match the temporal resolution of CT and PET to enhance PET imaging and evaluated tumor quantification with HCT and ACT. For example, an embodiment of a method of enhanced PET imaging on a PET/CT scanner includes generating an average CT scan responsive to 4D CT emission image data to thereby correct attenuation in PET emission image data. Another embodiment of a method of attenuation correction in a PET/CT scan includes averaging a plurality of consecutive low dose CT images of approximately one breathing cycle to thereby obtain an average CT.

US Patent:

20040081269, Apr 29, 2004

Filed:

Oct 23, 2002

Appl. No.:

10/065486

Inventors:

Kishore Acharya - Brookfield WI, US
David Caumartin - Bayside WI, US
Dershan Luo - Brookfield WI, US
Prathyusha Salla - Waukesha WI, US

International Classification:

G21K001/12

US Classification:

378/004000

Abstract:

A system for registering images using retrospective gating, the system comprising: an imaging system; an object disposed to be communicated with the imaging system, wherein the imaging system generates image data responsive to said object; and a processing device. The processing device executes a method comprising: determining a target area of interest; obtaining scout image data responsive to the target area; and processing the target area so as to create a sub-target area of interest. The method also includes computing a desired image acquisition time; operating said imaging system to create image data responsive to each sub-target area; combining the image data for each of the sub-target areas to create a set of image data; processing the image data to determine a phase of the image data; and synchronizing the image data.

US Patent:

20040084625, May 6, 2004

Filed:

Oct 31, 2002

Appl. No.:

10/284800

Inventors:

John Williams - Hartland WI, US
Dershan Luo - Brookfield WI, US
Mark Limkeman - Brookfield WI, US
Michael Cook - Oconomowoc WI, US
David McDaniel - Dousman WI, US
Edwin Oswalt - Waukesha WI, US
Mark Feilen - Mukwonago WI, US

International Classification:

G01T001/164

US Classification:

250/363030

Abstract:

A method of calibrating detectors in a detector ring of a PET scanner, each detector including a plurality of crystals, the PET scanner having a field of view, is disclosed. The method comprises collecting timing data indicative of coincidence events occurring between each pair of crystals within the field of view. The method further comprises determining a detector adjustment value for each detector, determining a crystal adjustment value for each crystal in each detector, and discretizing the crystal adjustment value for each crystal to produce a discretized crystal adjustment value for each crystal. Lastly, the method comprises calibrating each detector by applying the discretized crystal adjustment value for each crystal in each detector to the collected timing data indicative of coincidence events.