The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2014
Filed:
Sep. 27, 2011
George Cunha Cardoso, Webster, NY (US);
Lalit Keshav Mestha, Fairport, NY (US);
Beilei Xu, Penfield, NY (US);
George Cunha Cardoso, Webster, NY (US);
Lalit Keshav Mestha, Fairport, NY (US);
Beilei Xu, Penfield, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
What is disclosed is a system and method for image-based determination of carbon dioxide (CO) concentration in exhaled breath. In one embodiment, an image of the exhaled airstream of a subject of interest is received. The image is captured using a mid-wave infrared camera system having an optical filter tuned to the infrared absorption band of CO. The image is preprocessed to isolate a region of pixels containing the exhaled airstream and intensity values of pixels in the identified region are normalized by a value of a known radiance such as that of the subject's nose or face. The image is analyzed to determine COconcentration levels of the exhaled airstream using a calibration curve which relates pixel intensity to COconcentrations. The calibration curve is derived using a physics-based parameterized model. The COconcentration levels are determined and communicated to a computer workstation. Various embodiments are disclosed.