Influence of magnetic field strength on magnetic resonance imaging radiomics features in brain imaging, an in vitro and in vivo study - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Journal Articles Frontiers in Oncology Year : 2021

Influence of magnetic field strength on magnetic resonance imaging radiomics features in brain imaging, an in vitro and in vivo study

Emilie Chouzenoux
Hugues Talbot
Tite Mokoyoko
  • Function : Author
Joya Hadchiti
  • Function : Author
Mickeal El Haik
  • Function : Author
Sara Lakiss
  • Function : Author

Abstract

Background: The development and clinical adoption of quantitative imaging biomarkers (radiomics) has established the need for the identification of parameters altering radiomics reproducibility. The aim of this study was to assess the impact of magnetic field strength on magnetic resonance imaging (MRI) radiomics features in neuroradiology clinical practice. Methods: T1 3D SPGR sequence was acquired on two phantoms and 10 healthy volunteers with two clinical MR devices from the same manufacturer using two different magnetic fields (1.5 and 3T). Phantoms varied in terms of gadolinium concentrations and textural heterogeneity. 27 regions of interest were segmented (phantom: 21, volunteers: 6) using the LIFEX software. 34 features were analyzed. Results: In the phantom dataset, 10 (67%) out of 15 radiomics features were significantly different when measured at 1.5T or 3T (student’s t-test, p < 0.05). Gray levels resampling, and pixel size also influence part of texture features. These findings were validated in healthy volunteers. Conclusions: According to daily used protocols for clinical examinations, radiomic features extracted on 1.5T should not be used interchangeably with 3T when evaluating texture features. Such confounding factor should be adjusted when adapting the results of a study to a different platform, or when designing a multicentric trial.
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hal-03117688 , version 1 (21-01-2021)

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Samy Ammari, Stéphanie Pitre-Champagnat, Laurent Dercle, Emilie Chouzenoux, Salma Moalla, et al.. Influence of magnetic field strength on magnetic resonance imaging radiomics features in brain imaging, an in vitro and in vivo study. Frontiers in Oncology, 2021, 10, pp.541663. ⟨10.3389/fonc.2020.541663⟩. ⟨hal-03117688⟩
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