Evidence map›Paper›PMID 30578592›Full record

ArticleJournal of biophotonics2019

Quantification of collagen fiber structure using second harmonic generation imaging and two-dimensional discrete Fourier transform analysis: Application to the human optic nerve head.

Jacek K Pijanka, Petar P Markov, Dan Midgett, Neil G Paterson, Nick White, Emma J Blain, Thao D Nguyen, Harry A Quigley, Craig Boote

Open access · bronzeAbstract read
In one paragraph

Article in Journal of biophotonics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

26 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Collagen organization and structure inBiomedical optics express · 2024
    Article
  7. Article
  8. Collagen organization and structure inbioRxiv : the preprint server for biology · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Biomedical optics express · 2022
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Decorin-An Antagonist of TGF-β in Astrocytes of the Optic Nerve.International journal of molecular sciences · 2021
    Article
  19. Article
  20. Article
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

9 authors at 3 institutions in 2 countries.

Jacek K PijankaStructural Biophysics Group, School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK.ORCID 0000-0001-7738-1962
Petar P MarkovStructural Biophysics Group, School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK.
Dan MidgettDepartment of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland.
Neil G PatersonMX Division, Diamond Light Source, Harwell Science and Innovation Campus, Harwell, UK.
Nick WhiteVivat Scientia Bioimaging Labs, School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK.
Emma J BlainArthritis Research UK Biomechanics and Bioengineering Centre, Cardiff University, Cardiff, UK.
Thao D NguyenDepartment of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland.
Harry A QuigleyGlaucoma Center of Excellence, Wilmer Ophthalmological Institute, Johns Hopkins University, School of Medicine, Baltimore, Maryland.
Craig BooteStructural Biophysics Group, School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK.
Cardiff University · GBJohns Hopkins University · USDiamond Light Source · GB

Funding

PATHOGENESIS OF GLAUCOMATOUS OPTIC NERVE DAMAGER01EY002120 · NEI · JOHNS HOPKINS UNIVERSITY · PI QUIGLEY, HARRY ALAN · 1985 to 2025
$12.6M
The Biomechanics of the Human Posterior Sclera: Effects of Age, Sex, and GlaucomaR01EY021500 · NEI · JOHNS HOPKINS UNIVERSITY · PI NGUYEN, THAO D · 2011 to 2016
$933k
Foundation for the National Institutes of Health R01EY021500NEI NIH HHS R01 EY002120NEI NIH HHS R01 EY021500
6 · The paper itself

Abstract

Second harmonic generation (SHG) microscopy is widely used to image collagen fiber microarchitecture due to its high spatial resolution, optical sectioning capabilities and relatively nondestructive sample preparation. Quantification of SHG images requires sensitive methods to capture fiber alignment. This article presents a two-dimensional discrete Fourier transform (DFT)-based method for collagen fiber structure analysis from SHG images. The method includes integrated periodicity plus smooth image decomposition for correction of DFT edge discontinuity artefact, avoiding the loss of peripheral image data encountered with more commonly used windowing methods. Outputted parameters are as follows: the collagen fiber orientation distribution, aligned collagen content and the degree of collagen fiber dispersion along the principal orientation. We demonstrate its application to determine collagen microstructure in the human optic nerve head, showing its capability to accurately capture characteristic structural features including radial fiber alignment in the innermost layers of the bounding sclera and a circumferential collagen ring in the mid-stromal tissue. Higher spatial resolution rendering of individual lamina cribrosa beams within the nerve head is also demonstrated. Validation of the method is provided in the form of correlative results from wide-angle X-ray scattering and application of the presented method to other fibrous tissues.

Indexed as

Fourier AnalysisMicroscopyActin CytoskeletonAnimalsArtifactsCollagenHumansImage Processing, Computer-AssistedOptic DiskRatsTailTendonsCollagencollagen fiber structurediscrete Fourier transformedge effect artefact correctionnonlinear microscopyoptic nerve headsecond harmonic generation

Identifiers

PMID30578592
PMCPMC6506269
OpenAlexW2905840839

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.