Cross talk in the Lambert-Beer calculation for near-infrared wavelengths estimated by Monte Carlo simulations

K Uludag, M Kohl, J Steinbrink… - … of biomedical optics, 2002 - spiedigitallibrary.org
Using the modified Lambert-Beer law to analyze attenuation changes measured
noninvasively during functional activation of the brain might result in an insufficient …

Quantitative evaluation of the relative contribution ratio of cerebral tissue to near-infrared signals in the adult human head: a preliminary study

S Kohri, Y Hoshi, M Tamura, C Kato… - Physiological …, 2002 - iopscience.iop.org
Combining spatially-and time-resolved spectroscopies, we attempted to quantitatively
evaluate the contribution ratio of the partial mean pathlength of cerebral tissue to the …

Determination of absorption changes from moments of distributions of times of flight of photons: optimization of measurement conditions for a two-layered tissue model

A Liebert, H Wabnitz, C Elster - Journal of Biomedical Optics, 2012 - spiedigitallibrary.org
Time-resolved near-infrared spectroscopy allows for depth-selective determination of
absorption changes in the adult human head that facilitates separation between cerebral …

Physical model for the spectroscopic analysis of cortical intrinsic optical signals

M Kohl, U Lindauer, G Royl, M Kühl… - Physics in Medicine …, 2000 - iopscience.iop.org
Abstract We used Monte Carlo simulations and the diffusion approximation to estimate
correction terms for the analysis of reflectance spectra of cortical intrinsic optical signals …

Time-resolved absorption and hemoglobin concentration difference maps: a method to retrieve depth-related information on cerebral hemodynamics.

B Montcel, R Chabrier, P Poulet - Optics Express, 2006 - opg.optica.org
Time-resolved diffuse optical methods have been applied to detect hemodynamic changes
induced by cerebral activity. We describe a near infrared spectroscopic (NIRS) …

Estimation of cerebral oxy-and deoxy-haemoglobin concentration changes in a layered adult head model using near-infrared spectroscopy and multivariate statistical …

TS Leung, CE Elwell, DT Delpy - Physics in Medicine & Biology, 2005 - iopscience.iop.org
The non-invasive measurement of cerebral oxy-(ΔHbO br 2) and deoxy-haemoglobin (ΔHHb
br) changes using near-infrared spectroscopy instruments is often affected by the absorption …

Variation of haemoglobin extinction coefficients can cause errors in the determination of haemoglobin concentration measured by near-infrared spectroscopy

JG Kim, H Liu - Physics in Medicine & Biology, 2007 - iopscience.iop.org
Near-infrared spectroscopy or imaging has been extensively applied to various biomedical
applications since it can detect the concentrations of oxyhaemoglobin (HbO 2) …

Continuous correction of differential path length factor in near-infrared spectroscopy

T Talukdar, JH Moore… - Journal of biomedical …, 2013 - spiedigitallibrary.org
In continuous-wave near-infrared spectroscopy (CW-NIRS), changes in the concentration of
oxyhemoglobin and deoxyhemoglobin can be calculated by solving a set of linear equations …

Extinction coefficients of hemoglobin for near-infrared spectroscopy of tissue

JG Kim, M Xia, H Liu - IEEE engineering in medicine and …, 2005 - ieeexplore.ieee.org
Extinction coefficients of hemoglobin have been studied for five decades by clinical chemists
and biochemists, particularly for laboratory spectrophotometric measurements. In the last ten …

Factors affecting the accuracy of near-infrared spectroscopy concentration calculations for focal changes in oxygenation parameters

G Strangman, MA Franceschini, DA Boas - Neuroimage, 2003 - Elsevier
Near-infrared spectroscopy (NIRS) can be used to noninvasively measure changes in the
concentrations of oxy-and deoxyhemoglobin in tissue. We have previously shown that while …