Cotside Measurement of Cerebral Blood Flow in Ill Newborn Infants by Near Infrared Spectroscopy

Edwards, A. David; Richardson, C. E.; Cope, M; Wyatt, John; Delpy, David T.; Reynolds, E. O. R.

doi:10.1016/s0140-6736(88)92418-x

Cited by 349 publications

(176 citation statements)

References 10 publications

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“…Such approaches can be categorized into several different data types, as outlined in table 1. These [7][8][9] spectral derivative data multiple analyte analysis [10][11][12] fluorescence/excitation ratio fluorescence imaging [13][14][15] multi-distance data estimation of slopes with linear approximations robust tissue spectroscopy systems insensitive to slight shape changes [16][17][18] small-volume sampling scatter spectroscopy fibre probes with size less than effective scatter distance [19][20][21][22] absorption spectroscopy fibre probes sensitive to absorption only [23,24] fluorescence spectroscopy fibre probes sensitive to fluorescence and not tissue [25,26] temporal signals millisecond variations in tissue oxygen saturation and haemodynamic sampling [8,27,28] microsecond sampling flash photolysis analysis of biochemical changes in vivo [29,30] picosecond sampling ultrafast signals to reduce model dependence [31][32][33][34][35] high-frequency phase shift derivative with distance frequency-domain spectroscopy of tissue [36,37] lifetime-based signals fluorophore identification or microenvironment analysis [38] include: (i) ratiometric or derivative data at two or more different wavelengths, (ii) multiple-distance ratio or derivative data, (iii) small spatial volumes that either limit the effect of physical boundaries through scatter and/or absorption, or allow simpler empirical modelling, and (iv) temporal signals that are less sensitive to boundaries and/or more robustly insensitive to shape changes. The use of prior information about the tissue to be sampled is still essential in the design process with these systems, but can be implemented in the very first step o...…”

Section: Prior Information: Structure (A) External Shape and Internalmentioning

confidence: 99%

Implicit and explicit prior information in near-infrared spectral imaging: accuracy, quantification and diagnostic value

Pogue

Davis

Leblond

et al. 2011

Phil. Trans. R. Soc. A.

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Near-infrared spectroscopy (NIRS) of tissue provides quantification of absorbers, scattering and luminescent agents in bulk tissue through the use of measurement data and assumptions. Prior knowledge can be critical about things such as (i) the tissue shape and/or structure, (ii) spectral constituents, (iii) limits on parameters, (iv) demographic or biomarker data, and (v) biophysical models of the temporal signal shapes. A general framework of NIRS imaging with prior information is presented, showing that prior information datasets could be incorporated at any step in the NIRS process, with the general workflow being: (i) data acquisition, (ii) pre-processing, (iii) forward model, (iv) inversion/reconstruction, (v) post-processing, and (vi) interpretation/diagnosis. Most of the development in NIRS has used ad hoc or empirical implementations of prior information such as pre-measured absorber or fluorophore spectra, or tissue shapes as estimated by additional imaging tools. A comprehensive analysis would examine what prior information maximizes the accuracy in recovery and value for medical diagnosis, when implemented at separate stages of the NIRS sequence. Individual applications of prior information can show increases in accuracy or improved ability to estimate biochemical features of tissue, while other approaches may not. Most beneficial inclusion of prior information has been in the inversion/reconstruction process, because it solves the mathematical intractability. However, it is not clear that this is always the most beneficial stage.

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Section: Prior Information: Structure (A) External Shape and Internalmentioning

confidence: 99%

Implicit and explicit prior information in near-infrared spectral imaging: accuracy, quantification and diagnostic value

Pogue

Davis

Leblond

et al. 2011

Phil. Trans. R. Soc. A.

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“…Much research was aimed at obtaining absolute values either by physiological maneuvers (e.g. Edwards et al, 1988;Wyatt et al, 1990) or enhancing the instrumentation (e.g. Matcher et al, 1994Matcher et al, , 1995bWolf et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology

Scholkmann¹,

Kleiser²,

Metz³

et al. 2014

NeuroImage

1,471

1,394

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This year marks the 20th anniversary of functional near-infrared spectroscopy and imaging (fNIRS/fNIRI). As the vast majority of commercial instruments developed until now are based on continuous wave technology, the aim of this publication is to review the current state of instrumentation and methodology of continuous wave fNIRI. For this purpose we provide an overview of the commercially available instruments and address instrumental aspects such as light sources, detectors and sensor arrangements. Methodological aspects, algorithms to calculate the concentrations of oxy-and deoxyhemoglobin and approaches for data analysis are also reviewed. From the single-location measurements of the early years, instrumentation has progressed to imaging initially in two dimensions (topography) and then three (tomography). The methods of analysis have also changed tremendously, from the simple modified Beer-Lambert law to sophisticated image reconstruction and data analysis methods used today. Due to these advances, fNIRI has become a modality that is widely used in neuroscience research and several manufacturers provide commercial instrumentation. It seems likely that fNIRI will become a clinical tool in the foreseeable future, which will enable diagnosis in single subjects. This year marks the 20th anniversary of functional near-infrared spectroscopy and imaging (fNIRS/fNIRI). As the vast majority of commercial instruments developed until now are based on continuous wave technology, the aim of this publication is to review the current state of instrumentation and methodology of continuous wave fNIRI. For this purpose we provide an overview of the commercially available instruments and address instrumental aspects such as light sources, detectors and sensor arrangements. Methodological aspects, algorithms to calculate the concentrations of oxy-and deoxyhemoglobin and approaches for data analysis are also reviewed. From the single-location measurements of the early years, instrumentation has progressed to imaging initially in two dimensions (topography) and then three (tomography). The methods of analysis have also changed tremendously, from the simple modified Beer-Lambert law to sophisticated image reconstruction and data analysis methods used today. Due to these advances, fNIRI has become a modality that is widely used in neuroscience research and several manufacturers provide commercial instrumentation. It seems likely that fNIRI will become a clinical tool in the foreseeable future, which will enable diagnosis in single subjects. Contents

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“…Many research and observational studies were performed with neonates using various types of NIRS/cerebral oximetry monitors. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] However, no food and drug administration (FDA) approved cerebral oximeter is available for neonates. Successful validation of cerebral oximetry for the FDA has been done in human adult volunteer studies under protocols were jugular bulb and arterial blood samples were obtained under different levels of fractional inspired oxygen (FiO 2 ) levels.…”

Section: Introductionmentioning

confidence: 99%

Validation of a noninvasive neonatal optical cerebral oximeter in veno-venous ECMO patients with a cephalad catheter

2006

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Cotside Measurement of Cerebral Blood Flow in Ill Newborn Infants by Near Infrared Spectroscopy

Cited by 349 publications

References 10 publications

Implicit and explicit prior information in near-infrared spectral imaging: accuracy, quantification and diagnostic value

Implicit and explicit prior information in near-infrared spectral imaging: accuracy, quantification and diagnostic value

A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology

Validation of a noninvasive neonatal optical cerebral oximeter in veno-venous ECMO patients with a cephalad catheter

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