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  • Tukasa Funane et al., “Relationship between wavelength combination and signal-to-noise ratio in measuring hemoglobin concentrations using visible or near-infrared light,” Optical Review 16, 442-448 (2009)
  • Masashi Kiguchi et al., “Comparison of light intensity on the brain surface due to laser exposure during optical topography and solar irradiation,” J. Biomed. Opt. 12, 062108 (2007)
  • Hiroki Sato et al., “Within-subject reproducibility of near-infrared spectroscopy signals in sensorimotor activation after 6 months,” J. Biomed. Opt. 11, 014021 (2006)
  • Hiroki Sato et al., “Wavelength Dependence of Effective Pathlength Factor in Noninvasive Optical Measurements of Human Brain Functions,” Japanese Journal of Applied Physics, 45, L361-L363 (2006)
  • Hiroki Sato et al., “Wavelet analysis for detecting body-movement artifacts in optical topography signals,” NeuroImage 33, 580-587 (2006)
  • Takusige Katura et al., “Quantitative evaluation of interrelations between spontaneous low-frequency oscillations in cerebral hemodynamics and systemic cardiovascular dynamics,” NeuroImage 31, 1592-1600 (2006)
  • Hiroki Sato et al., “Intersubject variability of near-infrared spectroscopy signals during sensorimotor cortex activation,” J. Biomed. Opt. 10, 044001 (2005)
  • Hiroki Sato et al., “Practicality of wavelength selection to improve signal-to-noise ratio in near-infrared spectroscopy,” NeuroImage 21, 1554-1562 (2004)
  • Tsuyoshi Yamamoto et al., “Arranging optical fibres for the spatial resolution improvement of topographical images,” Phys. Med. Biol. 47, 3429-3440 (2002)
  • Yuichi Yamashita et al., “Wavelength dependence of the precision of noninvasive optical measurement of oxy-, deoxy-, and total-hemoglobin concentration,” Med. Phys. 28, 1108-1114 (2001)
  • Yoshitoshi Ito et al., “Assessment of heating effects in skin during continuous wave near infrared spectroscopy,” J. Biomed. Opt. 5, 383-390 (2000)
  • Yuichi Yamashita et al., “Measurement system for noninvasive dynamic optical topography,” J. Biomed Opt. 4, 414-417 (1999)
  • Atsushi Maki et al., “Visualizing human motor activity by using non-invasive optical topography,” Front Med Biol. Eng. 7, 285-297(1996)
  • Yuichi Yamashita et al., “Near-infrared topographic measurement system: imaging of absorbers localized in a scattering medium,” Rev. Sci. Instrum. 67, 730-732 (1996)
  • Yuichi Yamashita et al., “Noninvasive near-infrared topography of human brain activity using intensity modulation spectroscopy.” Opt. Eng. 35, 1046-1099 (1996)
  • Atsushi Maki et al., “Spatial and temporal analysis of human motor activity using noninvasive NIR topography.” Med Phys. 22, 1997-2005 (1995)


  • Kei Utsugi et al., “GO-STOP control using optical brain-computer interface during calculation task,” IEICE Trans. Commun. E91-B, 2133-2141 (2008)


  • Hideaki Koizumi et al., “Optical topography: practical problems and new applications,” Appl. Opt. 42, 3054-3062 (2003)
  • Hideaki Koizumi et al., “Higher-order brain function analysis by trans-cranial dynamic near-infrared spectroscopy imaging,” J. Biomed. Opt. 4, 403-413 (1999)

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