Evidence map›Paper›PMID 27033683›Full record

ArticleNeuroImage2016

MRI of brain tissue oxygen tension under hyperbaric conditions.

Eric R Muir, Damon P Cardenas, Timothy Q Duong

Open access · greenAbstract read
In one paragraph

Article in NeuroImage, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

12 citing papers in PubMed, 15 citations in OpenAlex.

  1. Review
  2. Article
  3. Cortical OProceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  11. High spatiotemporal vessel-specific hemodynamic mapping with multi-echo single-vessel fMRI.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2020
    Article
  12. Partial pressure of oxygen in the human body: a general review.American journal of blood research · 2019
    Review
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

3 authors at 1 institution in 1 country.

Eric R MuirResearch Imaging Institute, University of Texas Health Science Center, San Antonio, TX, United States; Department of Ophthalmology, University of Texas Health Science Center, San Antonio, TX, United States. Electronic address: muire@uthscsa.edu.
Damon P CardenasResearch Imaging Institute, University of Texas Health Science Center, San Antonio, TX, United States; Graduate School of Biomedical Science, University of Texas at San Antonio, San Antonio, TX, United States.
Timothy Q DuongResearch Imaging Institute, University of Texas Health Science Center, San Antonio, TX, United States; Department of Ophthalmology, University of Texas Health Science Center, San Antonio, TX, United States; South Texas Veterans Health Care System, Department of Veterans Affairs, San Antonio, TX, United States. Electronic address: duongt@uthscsa.edu.
The University of Texas Health Science Center at San Antonio · US

Funding

UTSA RISE Research Training ProgramR25GM060655 · NIGMS · UNIVERSITY OF TEXAS SAN ANTONIO · PI BAREA-RODRIGUEZ, EDWIN J · 2000 to 2022
$21.6M
Stroke Imaging of Conscious RatsR01NS045879 · NINDS · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI DUONG, TIMOTHY Q. · 2004 to 2014
$3.1M
NIGMS NIH HHS R25 GM060655NINDS NIH HHS R01 NS045879
6 · The paper itself

Abstract

The brain depends on a continuous supply of oxygen to maintain its structural and functional integrity. This study measured T1 from MRI under normobaric air, normobaric oxygen, hyperbaric air, and hyperbaric oxygen (HBO) conditions as a marker of tissue pO2 since dissolved molecular oxygen acts as an endogenous contrast agent. Brain tissue T1 decreased corresponding to increased pO2 with increasing inhaled oxygen concentrations, and tissue oxygenation was estimated from the T1 changes between different inhaled oxygen levels. Tissue pO2 difference maps between different oxygen conditions showed heterogeneous pO2 changes in the brain. MRI-derived tissue pO2 was markedly lower than the arterial pO2 but was slightly higher than venous pO2. Additionally, for comparison with published extracellular tissue pO2 data obtained using oxygen electrodes and other invasive techniques, a model was used to estimate extracellular and intracellular pO2 from the MRI-derived mean tissue pO2. This required multiple assumptions, and so the effects of the assumptions and parameters used in modeling brain pO2 were evaluated. MRI-derived pO2 values were strongly dependent on assumptions about the extra- and intracellular compartments but were relatively less sensitive to variations in the relaxivity constant of oxygen and contribution from oxygen in the cerebral blood compartment. This approach may prove useful in evaluating tissue oxygenation in disease states such as stroke.

Indexed as

AnimalsBrainHyperbaric OxygenationImage Interpretation, Computer-AssistedMagnetic Resonance ImagingMaleMolecular ImagingOximetryOxygenRatsRats, Sprague-DawleyReproducibility of ResultsSensitivity and SpecificityOxygenHyperbaric oxygenMRIT(1)Tissue oxygenation

Identifiers

PMID27033683
PMCPMC5313390
OpenAlexW2311767013

What OpenQuestion holds

Textmetadata
LicenceTDM
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.