Accession Number:

ADP011214

Title:

Development and Application of Noninvasive Optical Topography

Descriptive Note:

Corporate Author:

ADVANCED RESEARCH LAB SAITAMA (JAPAN)

Report Date:

2000-07-01

Pagination or Media Count:

10.0

Abstract:

Optical topography OT is a method for visualizing brain functions noninvasively. In an OT measurement system, near-infrared light, to which living tissue is highly permeable, is irradiated from the scalp of the subject, and the scattered light reflected from the cerebral cortex is detected elsewhere on the scalp. The spatio-temporal blood volume change in the cortex is visualized based on the signal detected using two-dimensionally arranged optodes. The measurement imposes few constraints on the subject, either physically or mentally, thus the subject is in a natural and relaxed condition during measurement. Here, we describe out OT system, then report on an experiment to evaluate the system using a phantom. We found that OT can accurately locate the activated region in the cortex. Also, as an example of a clinical application of OT, we used our system to measure the language function, demonstrating the systems ability to measure the activity of Brocas area. optical topography, brain function, blood-volume, phantom, and language function

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE