Format

Send to:

Choose Destination
See comment in PubMed Commons below
Neuroimage. 2006 May 15;31(1):116-24. Epub 2006 Jan 30.

Event-related functional near-infrared spectroscopy (fNIRS): are the measurements reliable?

Author information

  • 1Department of Psychiatry and Psychotherapy, Laboratory for Psychophysiology and Functional Imaging, University Hospital Wuerzburg, Fuechsleinstrasse 15, 97080 Wuerzburg, Germany. Plichta_M@klinik.uni-wuerzburg.de

Abstract

The purpose of the present study was to investigate the retest reliability of event-related functional near-infrared spectroscopy (fNIRS). Therefore, isolated functional activation was evoked in the occipital cortex by a periodic checkerboard stimulation. During a 52-channel fNIRS recording, 12 subjects underwent 60 trials of visual stimulation in two sessions. The retest interval was set to 3 weeks. Linear correlations of the contrast t values supplemented by scatter plots, channel-wise intraclass correlation coefficients (ICC) as well as reproducibility indices for the quantity of activated channels (RQUANTITY) and the location (ROVERLAP) of the detected activation were calculated. The results at the group level showed good reliability in terms of the single measure ICCs (up to 0.84) and excellent reproducibility quantified by RQUANTITY and ROVERLAP (up to 96% of the quantity and the location were reproducible), whereas the results at the single subjects' level were mediocre. Furthermore, the reliability assessed by single measurement ICCs improved if regarded at a cluster level.

PMID:
16446104
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk