Patent ID: 8715202
Filing Date: 2014-05-06
Classification: A61B,A61M,G01N,G16H

Abstract:
1. A method for image-based determination of carbon dioxide (CO 2 ) concentration in exhaled breath in a non-contact, minimally invasive, respiration measurement environment, the method comprising: receiving at least one IR image of the exhaled airstream of a subject of interest, said image having been captured using a mid-wave infrared camera system having at least one optical filter tuned to an infrared absorption band of CO processing, via a processor, said IR image to isolate pixels in regions associated with background objects in said image, an area of said subject's nose and face, and said exhaled airstream; and to obtain a digital intensity value for each region comprising values of I determining respective radiances R determining a radiance of said subject's exhaled airstream, R determining CO