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Pubmed for Handhelds

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  • Title: Note: three wavelengths near-infrared spectroscopy system for compensating the light absorbance by water.
    Author: Bhutta MR, Hong KS, Kim BM, Hong MJ, Kim YH, Lee SH.
    Journal: Rev Sci Instrum; 2014 Feb; 85(2):026111. PubMed ID: 24593411.
    Abstract:
    Given that approximately 80% of blood is water, we develop a wireless functional near-infrared spectroscopy system that detects not only the concentration changes of oxy- and deoxy-hemoglobin (HbO and HbR) during mental activity but also that of water (H2O). Additionally, it implements a water-absorption correction algorithm that improves the HbO and HbR signal strengths during an arithmetic task. The system comprises a microcontroller, an optical probe, tri-wavelength light emitting diodes, photodiodes, a WiFi communication module, and a battery. System functionality was tested by means of arithmetic-task experiments performed by healthy male subjects.
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