Title :
Water correction algorithm to improve the classification accuracy: A near-infrared spectroscopy study
Author :
Bhutta, M. Raheel ; Keum-Shik Hong ; Naseer, Noman ; Khan, M. Jawad
Author_Institution :
Dept. of Cogno Mechatron. Eng., Pusan Nat. Univ., Busan, South Korea
Abstract :
It is known that approximately 80% of blood is composed of water (H2O); we developed an algorithm which compensates the light absorbed by the water to improve the signal strength of oxy- and deoxy-hemoglobin (HbO and HbR) during mental activity. To practically implement the proposed algorithm, a new tri-wavelength LED based NIRS systems is used which is capable of detecting not only the concentration changes of HbO and HbR but also that of H2O. The proposed algorithm is tested using an arithmetic task experiment, performed with five healthy male subjects. By using the linear discriminant analysis (LDA) as classifier we were able to distinguish between the activity and rest periods. The results obtained in this study show that the classification accuracy to differentiate between task and rest period increases after we implied the water correction algorithm.
Keywords :
blood; infrared spectra; medical signal processing; pattern classification; signal classification; HbO; HbR; LDA classifier; NIRS systems; arithmetic task experiment; blood; classification accuracy improvement; deoxy-hemoglobin; light absorption; linear discriminant analysis; mental activity; near-infrared spectroscopy; oxy-hemoglobin; rest period; signal strength; task period; tri-wavelength LED; water correction algorithm; Absorption; Accuracy; Biomedical optical imaging; Classification algorithms; Optical imaging; Spectroscopy; Water; Absorbance correction; Classification accuracy; Hemodynamic response; Light absorption by water; Linear discriminant analysis (LDA); Near-infrared spectroscopy;
Conference_Titel :
Robotics and Emerging Allied Technologies in Engineering (iCREATE), 2014 International Conference on
Conference_Location :
Islamabad
Print_ISBN :
978-1-4799-5131-4
DOI :
10.1109/iCREATE.2014.6828346