Abstract
Near-infrared (NIR) topography has been applied to the measurement of brain activation. However the position resolution of optical topography is not sufficient to measure focal brain activation. Since the localization of the brain activation in visual cortex depends on the visual stimuli position, it is difficult to resolve the localized brain activation in the visual cortex by NIR topography. In this study, we measured the localised brain activation evoked by visual stimulation to evaluate the position resolution of NIR topography with the high-density probe arrangement. The topographic image is obtained without solving inverse problem to investigate the effect of the high-density probe arrangement on improvement of the position resolution of NIR topography. When the brain activations evoked by the broad visual stimuli such as the whole checker boards, the topographic image measured with the single-density arrangement is almost the same as that with the double-density arrangement. The double-density arrangement effectively improves the topographic image when the brain activations were evoked by the localized visual stimuli such as the fanshaped checker boards.
| Original language | English |
|---|---|
| Title of host publication | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
| Volume | 8088 |
| DOIs | |
| Publication status | Published - 2011 |
| Event | Diffuse Optical Imaging III - Munich, Germany Duration: 2011 May 22 → 2011 May 24 |
Other
| Other | Diffuse Optical Imaging III |
|---|---|
| Country | Germany |
| City | Munich |
| Period | 11/5/22 → 11/5/24 |
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Keywords
- near infrared spectroscopy
- optical topography
- visual stimuli
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Radiology Nuclear Medicine and imaging
Cite this
Evaluation of the position resolution of NIR topography by localised visual stimulation. / Kakuta, Hirokazu; Okada, Eiji.
Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 8088 2011. 80881B.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Evaluation of the position resolution of NIR topography by localised visual stimulation
AU - Kakuta, Hirokazu
AU - Okada, Eiji
PY - 2011
Y1 - 2011
N2 - Near-infrared (NIR) topography has been applied to the measurement of brain activation. However the position resolution of optical topography is not sufficient to measure focal brain activation. Since the localization of the brain activation in visual cortex depends on the visual stimuli position, it is difficult to resolve the localized brain activation in the visual cortex by NIR topography. In this study, we measured the localised brain activation evoked by visual stimulation to evaluate the position resolution of NIR topography with the high-density probe arrangement. The topographic image is obtained without solving inverse problem to investigate the effect of the high-density probe arrangement on improvement of the position resolution of NIR topography. When the brain activations evoked by the broad visual stimuli such as the whole checker boards, the topographic image measured with the single-density arrangement is almost the same as that with the double-density arrangement. The double-density arrangement effectively improves the topographic image when the brain activations were evoked by the localized visual stimuli such as the fanshaped checker boards.
AB - Near-infrared (NIR) topography has been applied to the measurement of brain activation. However the position resolution of optical topography is not sufficient to measure focal brain activation. Since the localization of the brain activation in visual cortex depends on the visual stimuli position, it is difficult to resolve the localized brain activation in the visual cortex by NIR topography. In this study, we measured the localised brain activation evoked by visual stimulation to evaluate the position resolution of NIR topography with the high-density probe arrangement. The topographic image is obtained without solving inverse problem to investigate the effect of the high-density probe arrangement on improvement of the position resolution of NIR topography. When the brain activations evoked by the broad visual stimuli such as the whole checker boards, the topographic image measured with the single-density arrangement is almost the same as that with the double-density arrangement. The double-density arrangement effectively improves the topographic image when the brain activations were evoked by the localized visual stimuli such as the fanshaped checker boards.
KW - near infrared spectroscopy
KW - optical topography
KW - visual stimuli
UR - http://www.scopus.com/inward/record.url?scp=79960660274&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79960660274&partnerID=8YFLogxK
U2 - 10.1117/12.889798
DO - 10.1117/12.889798
M3 - Conference contribution
AN - SCOPUS:79960660274
SN - 9780819486851
VL - 8088
BT - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
ER -