Worn type fNIRS brain imaging system

Abstract

The invention discloses a worn type fNIRS brain imaging system. The worn type fNIRS brain imaging system comprises a light source-photodetector module, a control and wireless transmitting module, a power supply module and an upper computer. According to the worn type fNIRS brain imaging system disclosed by the invention, the problem of worn type fNIRS brain imaging systems or EEG-fNIRS multimode brain imaging systems that relative positions of probes cannot be adjusted freely and detectable regions are limited can be solved; according to the system disclosed by the invention, relative positions of a light source probe and a photodetector can be adjusted freely according to actual situations, the spacing between the light source probe and the photodetector is measured automatically, measurement errors of brain blood oxygen signals can be reduced, and detectable regions of a brain can be adjusted flexibly; and the system disclosed by the invention can be matched with brain electric signal detection, brain electric sensors can be mounted around cylindrical bottom faces of the light source probe and the photodetectors, spacing among the brain electric sensors changes synchronously along with the probes, so that EEG-fNIRS multimode brain imaging is achieved, and brain electric signals of different densities can also be acquired.

Description

technical field [0001] The invention belongs to the technical fields of biomedical engineering and brain imaging, and in particular relates to a wearable fNIRS brain imaging system with adjustable probe positions and measurable spacing. Background technique [0002] Near-infrared light can reach biological tissues at a certain depth. Oxygenated hemoglobin (HbO) in the blood 2 ) and reduced hemoglobin (Hb) are the main absorbers of near-infrared light at 600-900nm. Functional near-infrared spectroscopy (fNIRS) technology uses near-infrared light to illuminate the brain, and places photodetectors a few centimeters away from the incident light source to receive the outgoing light. The outgoing light carries HbO in the cerebral cortex 2 and Hb concentration information. When the brain conducts neural activity, it will cause local HbO in a short time 2 The relative increase in concentration and the relative decrease in Hb concentration. Therefore, by measuring the cerebral ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned deficiencies in the prior art and to solve the problem that the relative position of the probe cannot be freely adjusted and the detectable area is limited in the wearable fNIRS brain imaging system or the EEG-fNIRS multimodal brain imaging system, the present invention provides a probe Wearable fNIRS brain imaging system with adjustable position and measurable spacing

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