Evidence map›Paper›PMID 34745761›Full record

ArticleBiomedical optics express2021

Time-domain NIRS system based on supercontinuum light source and multi-wavelength detection: validation for tissue oxygenation studies.

Aleh Sudakou, Frédéric Lange, Helene Isler, Pranav Lanka, Stanislaw Wojtkiewicz, Piotr Sawosz, Daniel Ostojic, Martin Wolf, Antonio Pifferi, Ilias Tachtsidis and 2 more

Open access · goldAbstract read
In one paragraph

Article in Biomedical optics express, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.5field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 30 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 4 institutions in 4 countries.

Aleh SudakouNalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland.ORCID https://orcid.org/0000-0003-0508-0495
Frédéric LangeDepartment of Medical Physics and Biomedical Engineering, University College London, London, UK.ORCID https://orcid.org/0000-0001-8561-1879
Helene IslerDepartment of Neonatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0002-6342-3356
Pranav LankaDipartimento di Fisica, Politecnico di Milano, Milano, Italy.ORCID https://orcid.org/0000-0002-0059-4748
Stanislaw WojtkiewiczNalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland.ORCID https://orcid.org/0000-0002-5556-4730
Piotr SawoszNalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland.ORCID https://orcid.org/0000-0002-0697-3036
Daniel OstojicDepartment of Neonatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Martin WolfDepartment of Neonatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0001-7525-891X
Antonio PifferiDipartimento di Fisica, Politecnico di Milano, Milano, Italy.ORCID https://orcid.org/0000-0002-2261-2089
Ilias TachtsidisDepartment of Medical Physics and Biomedical Engineering, University College London, London, UK.ORCID https://orcid.org/0000-0002-8125-0313
Adam LiebertNalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland.ORCID https://orcid.org/0000-0003-1643-7568
Anna GeregaNalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland.ORCID https://orcid.org/0000-0002-9809-6041
Institute of Biocybernetics and Biomedical Engineering · PLUniversity of Zurich · CHPolitecnico di Milano · ITUniversity College London · GB

Funding

Medical Research Council MR/S003134/1
6 · The paper itself

Abstract

We present and validate a multi-wavelength time-domain near-infrared spectroscopy (TD-NIRS) system that avoids switching wavelengths and instead exploits the full capability of a supercontinuum light source by emitting and acquiring signals for the whole chosen range of wavelengths. The system was designed for muscle and brain oxygenation monitoring in a clinical environment. A pulsed supercontinuum laser emits broadband light and each of two detection modules acquires the distributions of times of flight of photons (DTOFs) for 16 spectral channels (used width 12.5 nm / channel), providing a total of 32 DTOFs at up to 3 Hz. Two emitting fibers and two detection fiber bundles allow simultaneous measurements at two positions on the tissue or at two source-detector separations. Three established protocols (BIP, MEDPHOT, and nEUROPt) were used to quantitatively assess the system's performance, including linearity, coupling, accuracy, and depth sensitivity. Measurements were performed on 32 homogeneous phantoms and two inhomogeneous phantoms (solid and liquid). Furthermore, measurements on two blood-lipid phantoms with a varied amount of blood and Intralipid provide the strongest validation for accurate tissue oximetry. The retrieved hemoglobin concentrations and oxygen saturation match well with the reference values that were obtained using a commercially available NIRS system (OxiplexTS) and a blood gas analyzer (ABL90 FLEX), except a discrepancy occurs for the lowest amount of Intralipid.

Identifiers

PMID34745761
PMCPMC8548017
OpenAlexW3201150927

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.