Evidence map›Paper›PMID 40232665›Full record

ReviewEmergency radiology2025

The reverse halo sign in emergency chest CT: A diagnostic guide across diverse pulmonary conditions.

Furkan Ufuk, Iclal Ocak, Lydia Chelala, Luis Landeras

Abstract readReview
PubMed Full text at PMC Publisher
In one paragraph

Review in Emergency radiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
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

2 citing papers in PubMed.

  1. Review
  2. 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

4 authors.

Furkan UfukDepartment of Radiology, The University of Chicago Medicine, Chicago, IL, 60637, USA. furkan.ufuk@bsd.uchicago.com.ORCID http://orcid.org/0000-0002-8614-5387
Iclal OcakDepartment of Radiology, The University of Chicago Medicine, Chicago, IL, 60637, USA.
Lydia ChelalaDepartment of Radiology, The University of Chicago Medicine, Chicago, IL, 60637, USA.
Luis LanderasDepartment of Radiology, The University of Chicago Medicine, Chicago, IL, 60637, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The atoll sign, also known as the reverse halo sign (RHS), is defined by a central ground-glass opacity encircled by a rim of consolidation. Originally described in the context of organizing pneumonia, it is now recognized across a spectrum of conditions-including infectious, inflammatory, vascular, malignant, and traumatic pathologies. This pictorial essay examines the various clinical scenarios in which the RHS is observed on emergency CT, highlighting its crucial role in differential diagnosis and patient management.

Indexed as

Lung DiseasesRadiography, ThoracicTomography, X-Ray ComputedDiagnosis, DifferentialEmergency Service, HospitalHumansAtoll signInfectionMalignancyOrganizing pneumoniaPulmonary EmbolismTrauma

Identifiers

PMID40232665
PMCPMC12133904

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.