Enrico C Quintana

US Patent:

20130022176, Jan 24, 2013

Filed:

Sep 23, 2011

Appl. No.:

13/241569

Inventors:

Enrico C. Quintana - Albuquerque NM, US
Kyle R. Thompson - Albuquerque NM, US
David G. Moore - Albuquerque NM, US
Jack D. Heister - Albuquerque NM, US
Richard W. Poland - Aiken SC, US
John P. Ellegood - Aurora CO, US
George K. Hodges - Arab AL, US
James E. Prindville - Lincoln CA, US

International Classification:

H05G 1/02

US Classification:

378204

Abstract:

An X-ray contrast sensitivity gauge is described herein. The contrast sensitivity gauge comprises a plurality of steps of varying thicknesses. Each step in the gauge includes a plurality of recesses of differing depths, wherein the depths are a function of the thickness of their respective step. An X-ray image of the gauge is analyzed to determine a contrast-to-noise ratio of a detector employed to generate the image.

US Patent:

20220392078, Dec 8, 2022

Filed:

Jun 4, 2021

Appl. No.:

17/338867

Inventors:

- Albuquerque NM, US
Enrico C. Quintana - Albuquerque NM, US
Sharlotte Lorraine Bolyard Kramer - Albuquerque NM, US
Robert Waymel - Albuquerque NM, US
Kevin Nicholas Long - Cedar Crest NM, US

International Classification:

G06T 7/143
G06T 7/136
G06T 11/00

Abstract:

Illustrative embodiments are directed to methods, apparatus and computer program products for segmentation of X-ray tomography images via multiple reconstructions. A computed tomography scan of an object is received. The computed tomography scan is processed to generate an absorption reconstruction and a phase reconstruction from the computed tomography scan. First and second sets of seeds within the phase reconstruction are labeled as corresponding to a first phase by thresholding below a first threshold and corresponding to a second phase by thresholding above a second threshold, respectively. The absorption reconstruction is segmented automatically using an algorithm based on the first set of seeds, the second set of seeds and the absorption reconstruction. A final segmentation is produced based on a combination of the absorption reconstruction and the phase reconstruction.