Methods of Quantitating Cerebral Near Infrared Spectroscopy Data

Cope, M; Delpy, David T.; Reynolds, E. O. R.; Wray, Susan; Wyatt, John; Zee, Pieter van der

doi:10.1007/978-1-4615-9510-6_21

Cited by 440 publications

(286 citation statements)

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“…Probabilistic registration [15] was used to register fNIRS data to Montreal Neurological Institute standard brain space through the international 10-20 system. The optical fNIRS data were analyzed according to the modified Beer-Lambert-Law [16] to quantify changes in oxygenated hemoglobin (oxy-Hb), deoxygenated hemoglobin, and total hemoglobin concentration [17]. All analyses were performed on the change in oxy-Hb concentration.…”

Section: Methodsmentioning

confidence: 99%

Brain activity during the flow experience: A functional near-infrared spectroscopy study

Yoshida

Sawamura

Inagaki

et al. 2014

Neuroscience Letters

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Section: Methodsmentioning

confidence: 99%

Brain activity during the flow experience: A functional near-infrared spectroscopy study

Yoshida

Sawamura

Inagaki

et al. 2014

Neuroscience Letters

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“…The change in chromophore concentration can be quantified using a modified Beer Lambert Law. 15 The NIRS instrument (NIRO-500; Hamamatsu Photonics KK, Hamamatsu, Japan) used in this study produces light at four wavelengths that are transmitted in sequential pulses through a bundle of optical fibers to the liver. Photons emerging from the liver are collected by the second bundle of optical fibers and detected by a photomultiplier tube.…”

Section: Nirsmentioning

confidence: 99%

Changes in tissue oxygenation of the porcine liver measured by near-infrared spectroscopy

et al. 1999

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Near-infrared spectroscopy (NIRS) is a novel method for the measurement of tissue oxygenation and may have a role in monitoring liver oxygenation and viability. The aim of this study is to validate the application of NIRS for monitoring hepatic tissue oxygenation. Large Landrace pigs (n ‫؍‬ 12) underwent laparotomy and liver exposure. Total hepatic blood flow (THBF) was measured by the Transonic Medical Flowmeter system. NIRS probes were placed on the liver surface to continuously record changes in hepatic tissue oxyhemoglobin (HbO 2 ), deoxyhemoglobin (Hb), and the reduction-oxidation state of cytochrome oxidase (Cyt Ox). Reduction of hepatic tissue oxygenation was achieved by hepatic vascular inflow occlusion (n ‫؍‬ 6) or reduction of inspired oxygen (FIO 2 ; n ‫؍‬ 6). The THBF changes correlated significantly with hepatic HbO 2 (r ‫؍‬ 0.84; P F .001) and Cyt Ox (r ‫؍‬ 0.88; P F .001). With reduction of FIO 2 , a significant correlation was found between arterial oxygen saturation and hepatic HbO 2 and Hb (r ‫؍‬ 0.99 and r ‫؍‬ ؊0.99, respectively; P F .0001). NIRS measurement of liver parenchymal oxygenation correlates well with changes in liver blood flow and arterial oxygenation.

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“…Any 'poor' channels were discarded. The data were then converted to HbO and HbR based on a modified Beer-Lambardt Law (Cope et al 1988). Since resting state connectivity is based upon correlations between activity in relevant channels, it is important to carefully remove any aspects of the data (such as fluctuations from heartbeat, breathing, or from movement artifacts that are present in all channels) that would produce a correlation but is not related to neural activity.…”

Section: Resting-state Connectivity In CI Users Using Fnirsmentioning

confidence: 99%