Observing temperature fluctuations in humans using infrared imaging

Wei Min Liu*, Joseph Meyer, Christopher G. Scully, Eric Elster, Alexander M. Gorbach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


In this work we demonstrate that functional infrared imaging is capable of detecting low frequency temperature fluctuations in intact human skin and revealing spatial, temporal, spectral, and time-frequency based differences among three tissue classes: microvasculature, large sub-cutaneous veins, and the remaining surrounding tissue of the forearm. We found that large veins have stronger contractility in the range of 0.005-0.06 Hz compared to the other two tissue classes. Wavelet phase coherence and power spectrum correlation analysis show that microvasculature and skin areas without vessels visible by IR have high phase coherence in the lowest three frequency ranges (0.005-0.0095 Hz, 0.0095-0.02 Hz, and 0.02-0.06 Hz), whereas large veins oscillate independently.

Original languageEnglish
Pages (from-to)21-36
Number of pages16
JournalQuantitative InfraRed Thermography Journal
Issue number1
StatePublished - 2011
Externally publishedYes


  • Infrared imaging
  • Low frequency oscillation
  • Skin microvasculature
  • Thermoregulation
  • Wavelet phase coherence


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