James W Mccarrick

US Patent:

20140021357, Jan 23, 2014

Filed:

Jul 18, 2013

Appl. No.:

13/945351

Inventors:

James M. HALL - Livermore CA, US
James F. McCARRICK - Dublin CA, US
Vincent TANG - Pleasanton CA, US

International Classification:

G06T 5/00
G01T 1/20

US Classification:

25036301, 382255

Abstract:

The inversion algorithm based on the maximum entropy method (MEM) removes unwanted effects in high energy imaging which result from an uncollimated source interacting with a finitely thick scintillator. The algorithm takes as an input the image from the thick scintillator (TS) and the radiography setup geometry. The algorithm then outputs a restored image which appears as if taken with an infinitesimally thin scintillator (ITS). Inversion is accomplished by numerically generating a probabilistic model relating the ITS image to the TS image and then inverting this model on the TS image through MEM. This reconstruction technique can reduce the exposure time or the required source intensity without undesirable object blurring on the image by allowing the use of both thicker scintillators with higher efficiencies and closer source-to-detector distances to maximize incident radiation flux. The technique is applicable in radiographic applications including fast neutron, high energy gamma and x-ray radiography using thick scintillators.

US Patent:

20150316412, Nov 5, 2015

Filed:

Jun 23, 2014

Appl. No.:

14/311616

Inventors:

- Livewrmore CA, US
Mihail Bora - Livermore CA, US
Michael A. Engel - Ripon CA, US
James F. McCarrick - Dublin CA, US
Bryan D. Moran - Pleasanton CA, US

International Classification:

G01J 3/02
G01J 3/42
G01J 3/10

Abstract:

A method directs a gas of interest into a minicell and uses an emitting laser to produce laser emission light that is directed into the minicell and onto the gas of interest. The laser emission light is reflected within the cell to make multipasses through the gas of interest. After the multipasses through the gas of interest the laser light is analyzed to produces gas spectroscopy data. The minicell receives the gas of interest and a transmitting optic connected to the minicell that directs a beam into the minicell and onto the gas of interest. A receiving optic connected to the minicell receives the beam from the gas of interest and directs the beam to an analyzer that produces gas spectroscopy data.