Michael W Duncan

US Patent:

6901135, May 31, 2005

Filed:

Aug 28, 2003

Appl. No.:

10/651272

Inventors:

Timothy R. Fox - Chicago IL, US
David T. Nisius - Des Plaines IL, US
Michael T. Duncan - Elgin IL, US

Assignee:

Bio-Imaging Research, Inc. - Lincolnshire IL

International Classification:

H05G001/64

US Classification:

378 988, 25037011, 348294

Abstract:

A method and apparatus are provided for extending a dynamic range of an X-ray imaging system. The method includes the steps of detecting a plurality of X-ray beams, amplifying each of the plurality of detected X-ray beams using a first gain value, amplifying each of the plurality of detected X-ray beams using a second gain value, and forming an X-ray image from the detected X-ray beams amplified by the first gain value and from the detected X-ray beams amplified by the second gain value.

US Patent:

20140294147, Oct 2, 2014

Filed:

Mar 18, 2014

Appl. No.:

14/218699

Inventors:

- Palo Alto CA, US
Kevin Holt - Chicago IL, US
Robert E. Drubka - Scottsdale AZ, US
John Stammetti - Las Vegas NV, US
Michael Z. Duncan - Elgin IL, US
Timothy R. Fox - Chicago IL, US
David Nisius - Des Plaines IL, US
Martin Hu - Deerfield IL, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

G01V 5/00

US Classification:

378 57

Abstract:

Radiation scanning systems providing multiple views of an object in different planes and a reconstruction algorithm for reconstructing quasi-three-dimensional images from a limited number of views. A system may include bend magnets to direct accelerated charged particles to multiple targets in different viewing locations. Another system collimates radiation generated by a plurality of radiation sources into multiple beams for scanning an object at multiple angles. The object may be a cargo container, for example. The reconstruction algorithm uses an optimization algorithm and imaging and feasibility models to reconstruct quasi-three-dimensional images from the limited number of views.