Combining Multiple Magnetic Resonance Imaging Sequences Provides Independent Reproducible Radiomics Features View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-02-14

AUTHORS

A. Lecler, L. Duron, D. Balvay, J. Savatovsky, O. Bergès, M. Zmuda, E. Farah, O. Galatoire, A. Bouchouicha, L. S. Fournier

ABSTRACT

To evaluate the relative contribution of different Magnetic Resonance Imaging (MRI) sequences for the extraction of radiomics features in a cohort of patients with lacrimal gland tumors. This prospective study was approved by the Institutional Review Board and signed informed consent was obtained from all participants. From December 2015 to April 2017, 37 patients with lacrimal gland lesions underwent MRI before surgery, including axial T1-WI, axial Diffusion-WI, coronal DIXON-T2-WI and coronal post-contrast DIXON-T1-WI. Two readers manually delineated both lacrimal glands to assess inter-observer reproducibility, and one reader performed two successive delineations to assess intra-observer reproducibility. Radiomics features were extracted using an in-house software to calculate 85 features per region-of-interest (510 features/patient). Reproducible features were defined as features presenting both an intra-class correlation coefficient ≥0.8 and a concordance correlation coefficient ≥0.9 across combinations of the three delineations. Among these features, the ones yielding redundant information were identified as clusters using hierarchical clustering based on the Spearman correlation coefficient. All the MR sequences provided reproducible radiomics features (range 14(16%)−37(44%)) and non-redundant clusters (range 5–14). The highest numbers of features and clusters were provided by the water and in-phase DIXON T2-WI and water and in-phase post-contrast DIXON T1-WI (37, 26, 26 and 26 features and 14,12, 9 and 11 clusters, respectively). A total of 145 reproducible features grouped into 51 independent clusters was provided by pooling all the MR sequences. All MRI sequences provided reproducible radiomics features yielding independent information which could potentially serve as biomarkers. More... »

PAGES

2068

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-018-37984-8

DOI

http://dx.doi.org/10.1038/s41598-018-37984-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112133106

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30765732


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