Chapter

Oxygen Transport to Tissue XXXI

Volume 662 of the series Advances in Experimental Medicine and Biology pp 231-236

Date:

Theoretical and Experimental Investigation of the Influence of Frontal Sinus on the Sensitivity of the NIRS Signal in the Adult Head

  • Eiji OkadaAffiliated withDepartment of Electronics and Electrical Engineering, Keio University Email author 
  • , Daisuke YamamotoAffiliated withDepartment of Electronics and Electrical Engineering, Keio University
  • , Naoya KiryuAffiliated withDepartment of Electronics and Electrical Engineering, Keio University
  • , Akihisa KatagiriAffiliated withDivision of Neurological Surgery, Department of Neurological Surgery, Nihon University School of Medicine
  • , Noriaki YokoseAffiliated withDivision of Neurological Surgery, Department of Neurological Surgery, Nihon University School of Medicine
  • , Takashi AwanoAffiliated withCare of Springer
  • , Kouji IgarashiAffiliated withDivision of Neurological Surgery, Department of Neurological Surgery, Nihon University School of Medicine
  • , Sin NakamuraAffiliated withDivision of Neurological Surgery, Department of Neurological Surgery, Nihon University School of Medicine
  • , Tatsuya HoshinoAffiliated withDivision of Neurological Surgery, Department of Neurological Surgery, Nihon University School of Medicine
    • , Yoshihiro MurataAffiliated withDivision of Neurological Surgery, Department of Neurological Surgery, Nihon University School of Medicine
    • , Tsuneo KanoAffiliated withDivision of Neurosurgery, Department of Neurological Surgery, Nihon University School of Medicine
    • , Kaoru SakataniAffiliated withDivision of Optical Brain Engineering, Department of Neurological Surgery; Division of Applied System Neuroscience, Department of Advanced Medical Science, Nihon University School of Medicine
    • , Yoichi KatayamaAffiliated withDivision of Optical Brain Engineering, Department of Neurological Surgery; Division of Applied System Neuroscience, Department of Advanced Medical Science, Nihon University School of Medicine

* Final gross prices may vary according to local VAT.

Get Access

Abstract

The sensitivity of the near-infrared spectroscopy signal to the brain activation depends on the thickness and structure of the superficial tissues. The influence of the frontal sinus, which is void region in the skull, on the sensitivity to the brain activation is investigated by the time-resolved experiments and the theoretical modelling of the light propagation in the head. In the time-resolved experiments, the mean-time of flight for the forehead scarcely depends upon the existence of the frontal sinus when probe spacing was shorter than 30 mm. The partial optical path length in the brain, which indicates the sensitivity of the near-infrared spectroscopy signal to the brain activation, in a simplified head model is predicted by Monte Carlo simulation. The influence of the frontal sinus on the sensitivity of the signal depends on the thickness of the skull and the depth of the frontal sinus.