What is the ideal interoptode spacing?
This is really dependent on the signal quality. Typically for normal cortical penetration you will want anywhere from 3cm up, the larger the distance the deeper the penetration however at the sake of a reduced signal-to-noise ratio. Typically for normal adults we employ a 3.5cm interoptode distance, for those with darker skin or dark/dense hair…Read More
What are the advantages of LED over laser?
Lasers often require greater consideration in application. There are certainly constraints with regard to motility with a laser based setup that may not be of any concern with LED. Preparation times are often greater with laser than LED, as lasers are often added to a headcap one by one, whereas LED sources could sometimes be…Read More
What are the advantages of laser over LED?
Lasers naturally provide a very focal output and are excellent with narrow band frequency emission, thus the ability to discretely “tune” the light output is perhaps of some value, as you might imagine when studying the dispersion of light. Additionally modulation of lasers can take place many times fast than that of LED, as there…Read More
Is fNIRS comparable to fMRI?
fNIRS is of course a completely different modality than fMRI, however while the mechanics may differ there is overlap in the resulting measurements, ultimately cerebral blood flow and metabolic measurements may be obtained, and neuronal activation often assumed. fNIRS is specific to oxygenated and deoxygenated hemoglobin measurement and quantification due to light back reflection, while…Read More
Is fNIRS safe?
Very good, and important, question. Clearly fNIRS is employing frequencies of light that are purposely used to traverse the skull without much restraint, and this is in fact introducing exogenous stimuli. Well don’t fret, the amount of signal power using fNIRS can be comparable to sunlight. Further, of recent, several studies suggest there are various…Read More
Do I need to exclude participants with certain hair styles for fNIRS studies?
This is a tough one, inherently hair is the nemesis of any fNIRS device on the market and while we all would like to say we have this completely figured out it ultimately comes down to proper preparation, part of which is also a skill in performing. I would use the same criteria with regard…Read More
What operating systems does the OxySoft software support?
OxySoft is developed for use with Windows 7 or 10, both are supported however Windows 7 is still preferred. We also offer a free Android application for the PortaLite and PortaMon units for streaming and data logging.Read More
What is the range of the Bluetooth antenna on the PortaMon, PortaLite, and Brite23 units?
Both PortaLite and PortaMon units use a bluetooth connection with a long range antenna up to 150 meters is possible. The Brite 23 system offers a range of 30 meters.Read More
Can I perform measurements with more than one device simultaneously?
Yes, you may stream up to 7 devices, both wired (OxyMon), and wireless devices (Brite 23, PortaMon/PortaLite) to the same acquisition PC in real time.Read More