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:
Mar. 20, 2012
Filed:
Mar. 27, 2009
Steven E. Pav, San Francisco, CA (US);
Steven E. Pav, San Francisco, CA (US);
Nellcor Puritan Bennett LLC, Boulder, CO (US);
Abstract
Systems and methods for unmixing spectroscopic data using nonnegative matrix factorization during spectrographic data processing are provided according to various embodiments. In an embodiment, a method of processing spectrographic data may include receiving optical absorbance data associated with a sample and iteratively computing values for component spectra using nonnegative matrix factorization. The values for component spectra may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of a pathlength matrix and a matrix product of a concentration matrix and a component spectra matrix. The method may also include iteratively computing values for pathlength using nonnegative matrix factorization, in which pathlength values may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of the pathlength matrix and the matrix product of the concentration matrix and the component spectra matrix.