Investigating optical path and differential pathlength factor in reflectance photoplethysmography for the assessment of perfusion.

@article{Chatterjee2018InvestigatingOP,
  title={Investigating optical path and differential pathlength factor in reflectance photoplethysmography for the assessment of perfusion.},
  author={Subhasri Chatterjee and Tomas Ysehak Abay and Justin P. Phillips and Panayiotis A. Kyriacou},
  journal={Journal of biomedical optics},
  year={2018},
  volume={23 7},
  pages={
          1-11
        }
}
Photoplethysmography (PPG) is an optical noninvasive technique with the potential for assessing tissue perfusion. The relative time-change in the concentration of oxyhemoglobin and deoxyhemoglobin in the blood can be derived from DC part of the PPG signal. However, the absolute concentration cannot be determined due to the inadequate data on PPG optical paths. The optical path and differential pathlength factor (DPF) for PPG at red (660 nm) and infrared (880 nm) wavelengths were investigated… CONTINUE READING
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