Patent · US Active

NIRS device with optical wavelength and path length correction

US9907494B2 · kind B2 · utility

0Cited by

74References

8Claims

0Family size

Assignee

Hutchinson Technology Incorporated · US

Inventors

Bryan J. Scheele · Hutchinson, US
Nicholas H. Finstrom · Hopkins, US
Roger W. Schmitz · Helmond, NL

Key dates

Filing date	Apr 18, 2012
Grant date	Mar 6, 2018
Priority date	—
Expiry date	Feb 17, 2036

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B5/14551
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A near infrared spectrometer and method for wavelength and path length correction are disclosed. The spectrometer includes a number of photodiodes that transmit broadband near infrared measurement light into the tissue and at least one broadband detector which measures the light signal transmitted through the tissue. A processor estimates chromophore concentrations through a comparison of measured light attenuation and modeled light attenuation. The light attenuation model utilizes a light path length distribution derived from a Monte Carlo model and accounts for the spectral shape of the light source as a function of temperature.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.