Evidence map›Paper›PMID 32499951›Full record

ArticleBiomedical optics express2020

Label-free assessment of hemodynamics in individual cortical brain vessels using third harmonic generation microscopy.

Sung Ji Ahn, Nancy E Ruiz-Uribe, Baoqiang Li, Jason Porter, Sava Sakadzic, Chris B Schaffer

Open access · goldAbstract read
In one paragraph

Article in Biomedical optics express, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.7field-weighted citation impact, top 9% 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

19 citing papers in PubMed, 29 citations in OpenAlex.

  1. ECgo: All-optical induction of single endothelial cell injury and capillary occlusion in the brain.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  3. Live imaging of vascular dynamics in mouse skin.The Journal of investigative dermatology · 2026
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  7. Review
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  9. Pia-FLOW: Deciphering hemodynamic maps of the pial vascular connectome and its response to arterial occlusion.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Calcium transients in nNOS neurons underlie distinct phases of the neurovascular response to barrel cortex activation in awake mice.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2023
    Article
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  19. Recent advances in nonlinear microscopy: Deep insights and polarized revelations.The international journal of biochemistry & cell biology · 2021
    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

6 authors at 3 institutions in 1 country.

Sung Ji AhnMeinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14850, USA.
Nancy E Ruiz-UribeMeinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14850, USA.
Baoqiang LiAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
Jason PorterAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
Sava SakadzicAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
Chris B SchafferMeinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14850, USA.
Cornell University · USAthinoula A. Martinos Center for Biomedical Imaging · USMassachusetts General Hospital · US

Funding

Targeting ROCK for Neurogliovascular Plasticity & Remodeling After StrokeP01NS055104 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI LO, ENG H. · 2007 to 2018
$13.3M
MICROSCOPIC FOUNDATION OF MULTIMODAL HUMAN IMAGINGR01MH111359 · NIMH · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI DALE, ANDERS M, DEVOR, ANNA · 2016 to 2020
$5.6M
ApoE4 and mechanisms of diffuse white matter injuryR01NS100447 · NINDS · WEILL MEDICAL COLL OF CORNELL UNIV · PI IADECOLA, COSTANTINO · 2016 to 2020
$3.5M
Two-Photon Microscopy of Oxygen Consumption in the BrainR01NS091230 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI SAKADZIC, SAVA · 2015 to 2019
$2.4M
Multiscale modeling of cerebral blood flow and oxygen transportU01HL133362 · NHLBI · UNIVERSITY OF ARIZONA · PI SECOMB, TIMOTHY W. · 2017 to 2021
$2.0M
NHLBI NIH HHS U01 HL133362NINDS NIH HHS P01 NS055104NINDS NIH HHS R01 NS091230NINDS NIH HHS R01 NS100447
6 · The paper itself

Abstract

We show that third harmonic generation (THG) microscopy using a 1-MHz train of 1,300-nm femtosecond duration laser pulses enabled visualization of the structure and quantification of flow speed in the cortical microvascular network of mice to a depth of > 1 mm. Simultaneous three-photon imaging of an intravascular fluorescent tracer enabled us to quantify the cell free layer thickness. Using the label-free imaging capability of THG, we measured flow speed in different types of vessels with and without the presence of an intravascular tracer conjugated to a high molecular weight dextran (2 MDa FITC-dextran, 5% w/v in saline, 100 µl). We found a ∼20% decrease in flow speeds in arterioles and venules due to the dextran-conjugated FITC, which we confirmed with Doppler optical coherence tomography. Capillary flow speeds did not change, although we saw a ∼7% decrease in red blood cell flux with dextran-conjugated FITC injection.

Identifiers

PMID32499951
PMCPMC7249811
OpenAlexW3016458004

What OpenQuestion holds

Textmetadata
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.