Evidence map›Paper›PMID 32218458›Full record

ArticleScientific reports2020

Computer aided detection of tuberculosis on chest radiographs: An evaluation of the CAD4TB v6 system.

Keelin Murphy, Shifa Salman Habib, Syed Mohammad Asad Zaidi, Saira Khowaja, Aamir Khan, Jaime Melendez, Ernst T Scholten, Farhan Amad, Steven Schalekamp, Maurits Verhagen and 3 more

Abstract readEvaluation Study
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed, 4 pooled it
–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

81 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  3. eHealth in TB clinical management.The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease · 2022
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  6. Evaluation of C-Reactive Protein and Computer-Aided Analysis of Chest X-rays as Tuberculosis Triage Tests at Health Facilities in Lesotho and South Africa.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2024
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21 more citing papers are in PubMed but not listed here.

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

13 authors.

Keelin MurphyRadboud University Medical Center, 6525, GA, Nijmegen, The Netherlands. Keelin.Murphy@radboudumc.nl.
Shifa Salman HabibCommunity Health Solutions, Karachi, 74000, Pakistan.
Syed Mohammad Asad ZaidiCommunity Health Solutions, Karachi, 74000, Pakistan.
Saira KhowajaInteractive Research and Development, Karachi, 75190, Pakistan.
Aamir KhanInteractive Research and Development, Karachi, 75190, Pakistan.
Jaime MelendezThirona, 6525 EC, Nijmegen, The Netherlands.
Ernst T ScholtenRadboud University Medical Center, 6525, GA, Nijmegen, The Netherlands.
Farhan AmadCommunity Health Solutions, Karachi, 74000, Pakistan.
Steven SchalekampRadboud University Medical Center, 6525, GA, Nijmegen, The Netherlands.ORCID http://orcid.org/0000-0002-3984-3596
Maurits VerhagenUniversal Delft Ltd., Delft, Ghana.ORCID http://orcid.org/0000-0003-1937-1058
Rick H H M PhilipsenThirona, 6525 EC, Nijmegen, The Netherlands.
Annet MeijersThirona, 6525 EC, Nijmegen, The Netherlands.
Bram van GinnekenRadboud University Medical Center, 6525, GA, Nijmegen, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

There is a growing interest in the automated analysis of chest X-Ray (CXR) as a sensitive and inexpensive means of screening susceptible populations for pulmonary tuberculosis. In this work we evaluate the latest version of CAD4TB, a commercial software platform designed for this purpose. Version 6 of CAD4TB was released in 2018 and is here tested on a fully independent dataset of 5565 CXR images with GeneXpert (Xpert) sputum test results available (854 Xpert positive subjects). A subset of 500 subjects (50% Xpert positive) was reviewed and annotated by 5 expert observers independently to obtain a radiological reference standard. The latest version of CAD4TB is found to outperform all previous versions in terms of area under receiver operating curve (ROC) with respect to both Xpert and radiological reference standards. Improvements with respect to Xpert are most apparent at high sensitivity levels with a specificity of 76% obtained at a fixed 90% sensitivity. When compared with the radiological reference standard, CAD4TB v6 also outperformed previous versions by a considerable margin and achieved 98% specificity at the 90% sensitivity setting. No substantial difference was found between the performance of CAD4TB v6 and any of the various expert observers against the Xpert reference standard. A cost and efficiency analysis on this dataset demonstrates that in a standard clinical situation, operating at 90% sensitivity, users of CAD4TB v6 can process 132 subjects per day at an average cost per screen of $5.95 per subject, while users of version 3 process only 85 subjects per day at a cost of $8.38 per subject. At all tested operating points version 6 is shown to be more efficient and cost effective than any other version.

Indexed as

SoftwareAdultDatabases, FactualExpert TestimonyFemaleHumansMaleMiddle AgedObserver VariationPakistanRadiographic Image Interpretation, Computer-AssistedRadiography, ThoracicSensitivity and SpecificityTuberculosis, PulmonaryYoung Adult

Identifiers

PMID32218458
PMCPMC7099074

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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.