Inventors:
David W. Podlesak - Bluffdale UT, US
James R. Ehleringer - Salt Lake City UT, US
Thure E. Cerling - Salt Lake City UT, US
International Classification:
G01N 33/497, G06F 19/00, G06G 7/60
Abstract:
Methods and systems for determining travel history can be based on noninvasive analysis of stable isotope ratios in the body of an individual. A method for reconstructing a travel history for an individual can include collecting a sample of exhaled breath from the individual and analyzing the sample to obtain a breath isotope ratio. The breath isotope ratio can be transformed to a body water isotope ratio and compared to a map model correlating input isotope ratios to geographic locations so as to determine a travel origin for the individual.