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A portable functional imaging instrument for psychology research based on near-infrared spectroscopy |
Xiaohua LV, Yi ZHENG, Ting LI, Zhongxing ZHANG, Hui GONG( ) |
| The Key Laboratory of Biomedical Photonics of Ministry of Education, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology |
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Abstract To aid psychology researches on the function of the prefrontal cortex, a 16-channel brain functional imaging instrument based on near-infrared spectroscopy is developed. The probe of the instrument, covering a detection area of 15 cm × 4.4 cm of the prefrontal cortex, is made flexible and is easy to fix to the forehead. By employing multi-wavelength LEDs as light sources, using integrated detectors and choosing a USB-interface-based data acquisition device, the whole system is portable and convenient to use, which is good for psychological experiments. The system software is developed using Visual C++ 6.0, which controls the imaging process, measurement data plotting and storage. The maximal temporal resolution is about 100 ms. Noise and long-term drift test are given. The Valsalva maneuver experiment is used to validate the reliability of the instrument for monitoring hemodynamic changes.
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| Keywords
near-infrared spectroscopy
temporal resolution
functional brain activity
prefrontal cortex
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Corresponding Author(s):
GONG Hui,Email:huigong@mail.hust.edu.cn
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Issue Date: 05 September 2009
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