Functional Near-InfraRed Spectroscopy (fNIRS)
Near-infrared spectroscopy or optical tomography (fNIRS) is a new method of functional neuroimaging. The technique is similar to functional MRI, however, using fNIRS, it is possible to assess the activity of the cortex not inside the tomograph, but in the laboratory and even outdoors during the patient's physical activity or daily activities. In addition, the cost of the fNIRS system is significantly lower than an fMRI scanner. The fNIRS system produces near-infrared light in two different wavelengths, which makes it possible to recognize the two states of hemoglobin oxygenation. Sources and detectors of radiation are installed in a special hat. The fNIRS system evaluates the level of oxy- and deoxyhemoglobin, which allows to assess the activity of all areas of the cerebral cortex in real time.
Features of the fNIRS method:
fNIRS does not use any harmful radiation, the method can be used in children
-Minimally invasive technique:
fNIRS does not require additional contrast agent
-Functional imaging method:
Image contrast is achieved through tissue function rather than tissue anatomy
fNIRS is a relatively inexpensive and easy-to-use technology
fNIRS has higher temporal resolution than fMRI
fNIRS has higher spatial resolution than EEG
-Depth of light penetration into tissue:
The depth of light penetration into tissues (in the brain about 3 cm) limits the research area
NIRScout Extended - is a convenient, multimodal and reliable platform for near-infrared spectroscopy. The NIRScout Extended system is modular: the user can choose between 8-48 sources, 4-32 detectors and even select the type of source. By combining two NIRScout systems in tandem, a system of 96 sources and 64 detectors can be obtained.
It is the ideal system for fNIRS researchers looking for a high performance, versatile and easy to use optical tomography system.
Links to manufacturers:
NIRx Company: https://nirx.net/
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