DESIGN AND DEVELOPMENT OF NEAR-INFRARED SPECTROSCOPY SYSTEM FOR MONITORING FUNCTIONAL BRAIN ACTIVITY.
Journal Title: International Journal of Advanced Research (IJAR) - Year 2019, Vol 7, Issue 4
Abstract
Near infrared spectroscopy is an optical technique which can measure the spectral absorbing molecules. Recently, it has been widely researched about its applications because the method is noninvasive and safe. The technology can measure the changes in hemoglobin concentrations in the brain. NIRS is emerging as a promising tool in the cognitive neurosciences, neuro-pathology and psychological studies. Several models of NIRS instruments have been developed, but most of them are either expensive or have safety concerns when laser sources are used. We present a simplified NIRS system using continuous, bi-color LEDs emitting light at 760/840 nm, a photodiode with on-chip transimpedance amplifier having highest responsivity for the selected wavelengths. The system is controlled by two Arduino boards, each one for light sources and photodiodes. Since Arduino microcontroller boards are interfaced with the computer, analog to digital conversion (ADC) cards are not necessary in the NIRS system. A sensor probe was designed accommodating the light sources and photodectors. In the probe, LEDs and photodiodes were arranged such that a gap of 3 cm was maintained between the LED and photodiode in order to monitor the physiological activities in the cortex by measuring the hemodynamic responses. This system has been evaluated by phantom experiment. Observations from experiments suggest that this system can be used for monitoring functional activity of the human brain.
Authors and Affiliations
Nadr Saleh Faleh Alenzi, K. Prahlad Rao, Naif D. Alotaibi.
MEASURES AND STRATEGIES FOR MANAGING SAFETY ON CONSTRUCTION SITE.
The construction industry is inherently risky, with a substantial number of accidents. Moreover, most construction firms aims at completing projects on time, especially with different projects at hand thereby neglecting...
ADAPTABILITY OF DIFFERENT ROOT END FILLING MATERIALS.
Introduction: The purpose of this study was to evaluate and compare the adaptability of TotalFill, Mineral trioxide aggregate (MTA) and Intermediate restorative material (IRM) on human extracted teeth. Methods: Thirty si...
FACTORS AFFECTING CONSUMER BUYING BEHAVIOUR.
Consumer Buying Behaviour refers to the buying behaviour of the ultimate consumer. Many factors, specificities and characteristics influence the individual in what he is and the consumer in his decision making process, s...
CREATING ESTHETIC SMILE WITH LAMINATE VENEERS A CASE REPORT.
Dental profession has always been in a constant search of restorations that have a natural looking appearance and at the same time long lasting also. Advances in dental materials has led to the porcelain laminate veneers...
UTILIZATION OF UNZASEDA SHORT COURSES BY PURSUERS.
Short course provisioning is one of the most dynamic features of the emerging education and training system in the world of late. This kind of provisioning is particularly associated with ?just in time?, and ?just enough...