Evidence map›Paper›PMID 35449516›Full record

ArticleFrontiers in neurology2022

Hyperdense Artery Sign in Patients With Acute Ischemic Stroke-Automated Detection With Artificial Intelligence-Driven Software.

Charlotte Sabine Weyland, Panagiotis Papanagiotou, Niclas Schmitt, Olivier Joly, Pau Bellot, Yahia Mokli, Peter Arthur Ringleb, A Kastrup, Markus A Möhlenbruch, Martin Bendszus and 2 more

Open access · goldAbstract read
In one paragraph

Article in Frontiers in neurology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.

  1. Pooled it
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  5. Acute ischemic stroke patient factors associated with poor outcomes in patients with favorable collaterals and successful thrombectomy.Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association · 2025
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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 3 institutions in 3 countries.

Charlotte Sabine WeylandDepartment of Neuroradiology, University of Heidelberg, Heidelberg, Germany.
Panagiotis PapanagiotouDepartment of Neuroradiology, Klinikum Bremen-Mitte, Bremen, Germany.
Niclas SchmittDepartment of Neuroradiology, University of Heidelberg, Heidelberg, Germany.
Olivier JolyBrainomix Ltd., Oxford, United Kingdom.
Pau BellotBrainomix Ltd., Oxford, United Kingdom.
Yahia MokliDepartment of Neurology, University of Heidelberg, Heidelberg, Germany.
Peter Arthur RinglebDepartment of Neurology, University of Heidelberg, Heidelberg, Germany.
A KastrupNeurology, Klinikum Bremen-Mitte, Bremen, Germany.
Markus A MöhlenbruchDepartment of Neuroradiology, University of Heidelberg, Heidelberg, Germany.
Martin BendszusDepartment of Neuroradiology, University of Heidelberg, Heidelberg, Germany.
Simon NagelDepartment of Neurology, University of Heidelberg, Heidelberg, Germany.
Christian HerwehDepartment of Neuroradiology, University of Heidelberg, Heidelberg, Germany.
Heidelberg University · DEBrainomix (United Kingdom) · GBKlinikum Bremen-Mitte · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Hyperdense artery sign (HAS) on non-contrast CT (NCCT) can indicate a large vessel occlusion (LVO) in patients with acute ischemic stroke. HAS detection belongs to routine reporting in patients with acute stroke and can help to identify patients in whom LVO is not initially suspected. We sought to evaluate automated HAS detection by commercial software and compared its performance to that of trained physicians against a reference standard. Methods: Non-contrast CT scans from 154 patients with and without LVO proven by CT angiography (CTA) were independently rated for HAS by two blinded neuroradiologists and an AI-driven algorithm (Brainomix®). Sensitivity and specificity were analyzed for the clinicians and the software. As a secondary analysis, the clot length was automatically calculated by the software and compared with the length manually outlined on CTA images as the reference standard. Results: Among 154 patients, 84 (54.5%) had CTA-proven LVO. HAS on the correct side was detected with a sensitivity and specificity of 0.77 (CI:0.66-0.85) and 0.87 (0.77-0.94), 0.8 (0.69-0.88) and 0.97 (0.89-0.99), and 0.93 (0.84-0.97) and 0.71 (0.59-0.81) by the software and readers 1 and 2, respectively. The automated estimation of the thrombus length was in moderate agreement with the CTA-based reference standard [intraclass correlation coefficient (ICC) 0.73]. Conclusion: Automated detection of HAS and estimation of thrombus length on NCCT by the tested software is feasible with a sensitivity and specificity comparable to that of trained neuroradiologists.

Indexed as

acute ischemic strokeartificial intelligencecomputed tomographyhyperdense artery signlarge vessel occlusion

Identifiers

PMID35449516
PMCPMC9016329
OpenAlexW4226145380

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Registered trials

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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.