+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Multi-wavelength frequency domain near-infrared cerebral oximeter

Multi-wavelength frequency domain near-infrared cerebral oximeter

Official Gazette of the United States Patent & Trademark Office Patents 1261(3), Aug 20

The present invention provides a frequency domain near infrared oximeter (fdNIRS) instrument and associated method of determining the oxygenation level of tissue. The tissue is irradiated by a near infrared light source whereby the incident light passing through the tissue is detected by a light detector. Specifically, light signals of a single frequency at at least three separate wavelengths are provided from the near infrared light source. The near infrared light signals are collected with the light detector and, the phase differences between the collected near infrared light signals and a reference near infrared light signal are determined. The fdNIRS oximeter utilizes frequency domain technology to monitor phase shifts relative to a reference signal to derive SO2 through photon transport and Beer-Lambert equations.

(PDF emailed within 1 workday: $29.90)

Accession: 035349647

Download citation: RISBibTeXText

Related references

A multiwavelength frequency-domain near-infrared cerebral oximeter. Physics in Medicine & Biology 44(3): 727-740, 1999

Custom visible to infrared, multi-wavelength light emitters for pulse oximeter applications. Conference Proceedings 2012: 1184-1187, 2013

Development and validation of a multiwavelength spatial domain near-infrared oximeter to detect cerebral hypoxia-ischemia. Journal of Biomedical Optics 11(6): 064022, 2007

Evaluation of cerebral oxygenation in newborns with prematurity apnea: new frequency domain NIR oximeter. Acta Bio-Medica de l'Ateneo Parmense 71 Suppl 1: 609-613, 2001

Cerebral autoregulation in the preterm newborn using near-infrared spectroscopy: a comparison of time-domain and frequency-domain analyses. Journal of Biomedical Optics 20(3): 037009, 2015

Multi-channel medical device for time domain functional near infrared spectroscopy based on wavelength space multiplexing. Biomedical Optics Express 4(10): 2231-2246, 2013

Multi-wavelength photo-acoustic microscopy in the frequency domain for simultaneous excitation and detection of dyes. Biomedical Optics Express 10(2): 932-943, 2019

Multi-wavelength pulse oximeter is not suitable for adjusting D(LCO) measurements. Respiratory Care 56(8): 1115-1121, 2011

Comparison of different evaluation methods for a multi-wavelength pulse oximeter. Biomedizinische Technik. Biomedical Engineering 43 Suppl: 114-115, 1998

Early assessment of burn severity in human tissue ex vivo with multi-wavelength spatial frequency domain imaging. Toxicology in Vitro 52: 251-254, 2018

Multi wavelength oximeter having a means for disregarding a poor signal us patent 4714341. december 22 1987. Official Gazette of the United States Patent & Trademark Office Patents 1085(4): 1765, 1987

Anisotropy decays of indole, melittin monomer and melittin tetramer by frequency-domain fluorometry and multi-wavelength global analysis. Biophysical Chemistry 39(3): 241-251, 1991

Detection of cerebral ischemia in neurovascular surgery using quantitative frequency-domain near-infrared spectroscopy. Journal of Neurosurgery 106(2): 283-290, 2007

Frequency analysis of oscillations in cerebral hemodynamics measured by time domain near infrared spectroscopy. Biomedical Optics Express 10(2): 761-771, 2019

Multi-channel multi-carrier generation using multi-wavelength frequency shifting recirculating loop. Optics Express 20(20): 21833-9, 2013