Open AccessSpatial sensitivity and penetration depth of three cerebral oxygenation monitors
Author(s) -
Sonny Gunadi,
Terence S. Leung,
Clare E. Elwell,
Ilias Tachtsidis
Publication year - 2014
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.5.002896
Subject(s) - penetration (warfare) , penetration depth , materials science , optics , absorption (acoustics) , oxygenation , environmental science , physics , medicine , anesthesia , operations research , engineering
The spatial sensitivities of NIRO-100, ISS Oximeter and TRS-20 cerebral oxygenation monitors are mapped using the local perturbation method to inform on their penetration depths and susceptibilities to superficial contaminations. The results show that TRS-20 has the deepest mean penetration depth and is less sensitive than the other monitors to a localized absorption change in the superficial layer. However, an integration time of more than five seconds is required by the TRS-20 to achieve an acceptable level of signal-to-noise ratio, which is the poorest amongst the monitors. With the exception of NIRO-100 continuous wave method, the monitors are not significantly responsive to layer-wide absorption change that occurs in the superficial layer.