Evidence map›Paper›PMID 29761357›Full record

ArticleEuropean radiology2018

Classifying brain metastases by their primary site of origin using a radiomics approach based on texture analysis: a feasibility study.

Rafael Ortiz-Ramón, Andrés Larroza, Silvia Ruiz-España, Estanislao Arana, David Moratal

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Article in European radiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing 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

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3 · Its place in the literature

Who cites it

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

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13 more citing papers are in PubMed but not listed here.

4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Rafael Ortiz-RamónCentre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain.
Andrés LarrozaDepartment of Medicine, Universitat de València, Av. Blasco Ibáñez 15, 46010, Valencia, Spain.
Silvia Ruiz-EspañaCentre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain.
Estanislao AranaDepartment of Radiology, Fundación Instituto Valenciano de Oncología, Calle Beltrán Báguena 8, 46009, Valencia, Spain.
David MoratalCentre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain. dmoratal@eln.upv.es.ORCID http://orcid.org/0000-0002-2825-3646

Funding

Generalitat Valenciana ACIF/2015/078Ministerio de Economía y Competitividad BFU2015-64380-C2-2-RMinisterio de Educación, Cultura y Deporte FPU12/01140
6 · The paper itself

Abstract

objectiveTo examine the capability of MRI texture analysis to differentiate the primary site of origin of brain metastases following a radiomics approach.

methodsSixty-seven untreated brain metastases (BM) were found in 3D T1-weighted MRI of 38 patients with cancer: 27 from lung cancer, 23 from melanoma and 17 from breast cancer. These lesions were segmented in 2D and 3D to compare the discriminative power of 2D and 3D texture features. The images were quantized using different number of gray-levels to test the influence of quantization. Forty-three rotation-invariant texture features were examined. Feature selection and random forest classification were implemented within a nested cross-validation structure. Classification was evaluated with the area under receiver operating characteristic curve (AUC) considering two strategies: multiclass and one-versus-one.

resultsIn the multiclass approach, 3D texture features were more discriminative than 2D features. The best results were achieved for images quantized with 32 gray-levels (AUC = 0.873 ± 0.064) using the top four features provided by the feature selection method based on the p-value. In the one-versus-one approach, high accuracy was obtained when differentiating lung cancer BM from breast cancer BM (four features, AUC = 0.963 ± 0.054) and melanoma BM (eight features, AUC = 0.936 ± 0.070) using the optimal dataset (3D features, 32 gray-levels). Classification of breast cancer and melanoma BM was unsatisfactory (AUC = 0.607 ± 0.180).

conclusionVolumetric MRI texture features can be useful to differentiate brain metastases from different primary cancers after quantizing the images with the proper number of gray-levels. KEY POINTS: • Texture analysis is a promising source of biomarkers for classifying brain neoplasms. • MRI texture features of brain metastases could help identifying the primary cancer. • Volumetric texture features are more discriminative than traditional 2D texture features.

Indexed as

AdultAgedAnalysis of VarianceBrain NeoplasmsBreast NeoplasmsDiagnosis, DifferentialFeasibility StudiesFemaleHumansLung NeoplasmsMagnetic Resonance ImagingMaleMelanomaMiddle AgedRetrospective StudiesROC CurveBiomarkersFeasibility studiesImage processing, Computer-assistedMagnetic resonance imagingNeoplasms, Unknown primary

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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.