Evidence map›Paper›PMID 34264221›Full record

ArticleOptics letters2021

In vivo measurement of the lineal density of red blood cells in human retinal capillaries using high-speed adaptive optics ophthalmoscopy.

Boyu Gu, David Sarraf, Michael Ip, Srinivas R Sadda, Yuhua Zhang

Open access · greenAbstract read
In one paragraph

Article in Optics letters, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
0.8field-weighted citation impact, top 28% 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

4 citing papers in PubMed, 6 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. 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

5 authors at 2 institutions in 1 country.

Boyu Gu
David Sarraf
Michael Ip
Srinivas R Sadda
Yuhua Zhang
University of California, Los Angeles · USDoheny Eye Institute · US

Funding

In vivo Ultrastructure of Chorioretinal DiseaseR01EY024378 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI ZHANG, YUHUA LIANG · 2015 to 2023
$2.9M
In Vivo Characterizations of Retinal HemodynamicsR01EY034218 · NEI · DOHENY EYE INSTITUTE · PI ZHANG, YUHUA LIANG · 2022 to 2025
$1.5M
NEI NIH HHS R01 EY024378NEI NIH HHS R01 EY034218
6 · The paper itself

Abstract

We present an automated method for measuring the lineal density of red blood cells (RBCs) in human retinal capillaries using adaptive optics near-confocal ophthalmoscopy (AONCO). The spatiotemporal traces of RBCs flowing in retinal capillaries were extracted from AONCO images, enhanced using the Gabor filter, the vesselness filter, and the Hough transform. A total of 43 capillary segments (each 50 µm long) were analyzed in 12 eyes of 12 subjects, and the measurement error of the automated method was 0.09 cell over 50 µm compared with results obtained by manual counting. Our method provides a tool for assessing RBC spatial distribution in retinal capillaries.

Indexed as

CapillariesErythrocytesHumansOphthalmoscopyOptics and PhotonicsRetina

Identifiers

PMID34264221
PMCPMC10214498
OpenAlexW3169881834

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.