Evidence map›Paper›PMID 33497881›Full record

ArticleEuropean journal of radiology2021

Multi-classifier-based identification of COVID-19 from chest computed tomography using generalizable and interpretable radiomics features.

Lu Wang, Brendan Kelly, Edward H Lee, Hongmei Wang, Jimmy Zheng, Wei Zhang, Safwan Halabi, Jining Liu, Yulong Tian, Baoqin Han and 4 more

Open access · hybridAbstract read
In one paragraph

Article in European journal of radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

16 citing papers in PubMed, 30 citations in OpenAlex.

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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

14 authors at 6 institutions in 2 countries.

Lu WangSchool of Medical Informatics, China Medical University Puhe Rd, Shenbei New District, Shenyang, Liaoning, 110122, China.
Brendan KellyDepartment of Radiology, School of Medicine, Stanford University 725 Welch Rd MC 5654, Palo Alto, CA, 94305, United States.
Edward H LeeDepartment of Radiology, School of Medicine, Stanford University 725 Welch Rd MC 5654, Palo Alto, CA, 94305, United States.
Hongmei WangDepartment of Radiology, The First Affiliated Hospital of University of Science and Technology of China, No. 1 Swan Lake Road Hefei, Anhui, 230036, China.
Jimmy ZhengDepartment of Radiology, School of Medicine, Stanford University 725 Welch Rd MC 5654, Palo Alto, CA, 94305, United States.
Wei ZhangDepartment of Radiology, the Lu'an Affiliated Hospital, Anhui Medical University, No. 21 Wanxi Rd, Lu'an, Anhui, 237005, China.
Safwan HalabiDepartment of Radiology, School of Medicine, Stanford University 725 Welch Rd MC 5654, Palo Alto, CA, 94305, United States.
Jining LiuBengbu Medical College, Department of Imaging Medicine, 2600 Donghai Avenue, Bengbu, Anhui, 233030, China.
Yulong TianWannan Medical College, Department of Imaging Medicine and Nuclear Medicine, 22 Wenchang West Rd, Higher Education Park, Wuhu, Anhui, 241002, China.
Baoqin HanWannan Medical College, Department of Imaging Medicine and Nuclear Medicine, 22 Wenchang West Rd, Higher Education Park, Wuhu, Anhui, 241002, China.
Chuanbin HuangWannan Medical College, Department of Imaging Medicine and Nuclear Medicine, 22 Wenchang West Rd, Higher Education Park, Wuhu, Anhui, 241002, China.
Kristen W YeomDepartment of Radiology, School of Medicine, Stanford University 725 Welch Rd MC 5654, Palo Alto, CA, 94305, United States.
Kexue DengDepartment of Radiology, The First Affiliated Hospital of University of Science and Technology of China, No. 1 Swan Lake Road Hefei, Anhui, 230036, China.
Jiangdian SongSchool of Medical Informatics, China Medical University Puhe Rd, Shenbei New District, Shenyang, Liaoning, 110122, China; Department of Radiology, School of Medicine, Stanford University 1201 Welch Rd, Lucas Center, Palo Alto, CA, 94305, United States. Electronic address: song.jd0910@gmail.com.
Stanford University · USWannan Medical College · CNChina Medical University · CNUniversity of Science and Technology of China · CNAnhui Medical University · CNBengbu Medical College · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo investigate the efficacy of radiomics in diagnosing patients with coronavirus disease (COVID-19) and other types of viral pneumonia with clinical symptoms and CT signs similar to those of COVID-19.

methodsBetween 18 January 2020 and 20 May 2020, 110 SARS-CoV-2 positive and 108 SARS-CoV-2 negative patients were retrospectively recruited from three hospitals based on the inclusion criteria. Manual segmentation of pneumonia lesions on CT scans was performed by four radiologists. The latest version of Pyradiomics was used for feature extraction. Four classifiers (linear classifier, k-nearest neighbour, least absolute shrinkage and selection operator [LASSO], and random forest) were used to differentiate SARS-CoV-2 positive and SARS-CoV-2 negative patients. Comparison of the performance of the classifiers and radiologists was evaluated by ROC curve and Kappa score.

resultsWe manually segmented 16,053 CT slices, comprising 32,625 pneumonia lesions, from the CT scans of all patients. Using Pyradiomics, 120 radiomic features were extracted from each image. The key radiomic features screened by different classifiers varied and lead to significant differences in classification accuracy. The LASSO achieved the best performance (sensitivity: 72.2%, specificity: 75.1%, and AUC: 0.81) on the external validation dataset and attained excellent agreement (Kappa score: 0.89) with radiologists (average sensitivity: 75.6%, specificity: 78.2%, and AUC: 0.81). All classifiers indicated that "Original_Firstorder_RootMeanSquared" and "Original_Firstorder_Uniformity" were significant features for this task.

conclusionsWe identified radiomic features that were significantly associated with the classification of COVID-19 pneumonia using multiple classifiers. The quantifiable interpretation of the differences in features between the two groups extends our understanding of CT imaging characteristics of COVID-19 pneumonia.

Indexed as

Tomography, X-Ray ComputedAdultAged, 80 and overCOVID-19FemaleHumansMaleMiddle AgedRadiologistsRetrospective StudiesROC CurveSARS-CoV-2Coronavirus infectionsMachine learningPneumoniaRadiologyTomography, X-Ray computed

Identifiers

PMID33497881
PMCPMC7810032
OpenAlexW3120864196

What OpenQuestion holds

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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.