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Crosstalk in the measurement of focal brain activation by near-infrared topography

N. Okui and E. Okada

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Abstract

Crosstalk between oxy- and deoxy-haemoglobin observed in near-infrared topography is investigated. The topographic images of changes in oxy- and deoxy-haemoglobin are obtained from the changes in intensity detected with source-detector pairs. The crosstalk depends on the relative position of the focal absorption change to source-detector pairs. Appropriate selection of wavelength pair is effective to reduce the crosstalk in the topographic image.

© 2005 Optical Society of America

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