Patent ID: 8543180
Filing Date: 2013-09-24
Classification: A61B,G01J,G01N

Abstract:
1. A total hemoglobin measurement system for measuring total hemoglobin in human tissue comprising: a signal generator for generating a digital modulation signal representing a code sequence; an optical illumination source coupled to said signal generator for receiving said digital modulation signal and configured for transmitting a modulated optical signal along an optical transmission path to said human tissue in response to said digital modulation signal; a detector configured to be optically coupled to said human tissue for receiving said modulated optical signal after transmission through the optical transmission path through said human tissue; a processor coupled to said detector for deriving a temporal transfer characteristic for said optical signal received by said detector and for determining said total hemoglobin based on said temporal transfer characteristic; a second signal generator for generating a second digital modulation signal representing a second code sequence, wherein said second code sequence and said code sequence have the same ordering of code elements and begin at different code elements; and a second optical illumination source coupled to said second signal generator for receiving said second digital modulation signal and configured for transmitting a second modulated optical signal to said human tissue in response to said second digital modulation signal.