A near-infrared calibration method suitable for quantification of broadband data in humans

Qiong Zhang, Sathyanarayanan Srinivasan, Ying Wu, Siraj Natah, Jeff F. Dunn

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Broadband near-infrared spectroscopy (bNIRS) is a powerful non-invasive technique for the measurement of hemoglobin. bNIRS systems are relatively simple to construct compared with many near-infrared instruments since they operate on the principle of continuous wave. The advantage of the broadband method is the capacity to model the spectra and to use " the second differential method" to quantify deoxyhemoglobin (HHb). An " anoxia pulse" method can be applied to quantify total haemoglobin (tHb) and tissue oxygen saturation (StO2). A disadvantage is that this calibration method is not suitable for application in humans. In this study, we compared the " anoxia pulse" method with " graded hypoxia" method, which can be applied for human studies, to quantify tHb and StO2. The values obtained with the two methods were respectively (tHb=47.8±2.8 and 49.4±7.7μM, mean±S.D., n=8) and (StO2=72.8±3.7% and 73.2±5.7%, mean±S.D., n=8). There was no significant difference (p<0.05) between the two methods, indicating that the graded hypoxia method could be used for quantification of tHb and StO2 in human subjects.

Original languageEnglish (US)
Pages (from-to)181-186
Number of pages6
JournalJournal of Neuroscience Methods
Volume188
Issue number2
DOIs
StatePublished - May 2010
Externally publishedYes

Keywords

  • Broadband
  • Deoxyhemoglobin quantification
  • Hemoglobin
  • Near-infrared spectroscopy
  • Rat brain
  • Tissue oxygen saturation

ASJC Scopus subject areas

  • Neuroscience(all)

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