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Precision of MRI radiomics features in the liver and hepatocellular carcinoma

  • Magnetic Resonance
  • Published:
European Radiology Aims and scope Submit manuscript

Abstract

Objectives

To assess the precision of MRI radiomics features in hepatocellular carcinoma (HCC) tumors and liver parenchyma.

Methods

The study population consisted of 55 patients, including 16 with untreated HCCs, who underwent two repeat contrast-enhanced abdominal MRI exams within 1 month to evaluate: (1) test–retest repeatability using the same MRI system (n = 28, 10 HCCs); (2) inter-platform reproducibility between different MRI systems (n = 27, 6 HCCs); (3) inter-observer reproducibility (n = 16, 16 HCCs). Shape and 1st- and 2nd-order radiomics features were quantified on pre-contrast T1-weighted imaging (WI), T1WI portal venous phase (pvp), T2WI, and ADC (apparent diffusion coefficient), on liver regions of interest (ROIs) and HCC volumes of interest (VOIs). Precision was assessed by calculating intraclass correlation coefficient (ICC), concordance correlation coefficient (CCC), and coefficient of variation (CV).

Results

There was moderate to excellent test–retest repeatability of shape and 1st- and 2nd-order features for all sequences in HCCs (ICC: 0.53–0.99; CV: 3–29%), and moderate to good test–retest repeatability of 1st- and 2nd-order features for T1WI sequences, and 2nd-order features for T2WI in the liver (ICC: 0.53–0.73; CV: 12–19%). There was poor inter-platform reproducibility for all features and sequences, except for shape and 1st-order features on T1WI in HCCs (CCC: 0.58–0.99; CV: 3–15%). Good to excellent inter-observer reproducibility was found for all features and sequences in HCCs (CCC: 0.80–0.99; CV: 4–15%) and moderate to good for liver (CCC: 0.45–0.86; CV: 6–25%).

Conclusions

MRI radiomics features have acceptable repeatability in the liver and HCC when using the same MRI system and across readers but have low reproducibility across MR systems, except for shape and 1st-order features on T1WI. Data must be interpreted with caution when performing multiplatform radiomics studies.

Key Points

• MRI radiomics features have acceptable repeatability when using the same MRI system but less reproducible when using different MRI platforms.

• MRI radiomics features extracted from T1 weighted-imaging show greater stability across exams than T2 weighted-imaging and ADC.

• Inter-observer reproducibility of MRI radiomics features was found to be good in HCC tumors and acceptable in liver parenchyma.

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Abbreviations

ADC:

Apparent diffusion coefficient

CCC:

Concordance correlation coefficient

CV:

Coefficient of variation

GLCM:

Gray-level co-occurrence matrix

GLDM:

Gray-level dependence matrix

GLRLM:

Gray-level run length matrix

GLSZM:

Gray-level size zone matrix

HCC:

Hepatocellular carcinoma

IBSI:

Image Biomarker Standardization Initiative

ICC:

Intraclass correlation coefficient

NGTDM:

Neighboring gray tone difference matrix

QIB:

Quantitative imaging biomarker

QIBA:

Quantitative Imaging Biomarkers Alliance

ROI:

Region of interest

T1WIpre:

T1-weighted imaging pre-contrast

T1WIpvp:

T1-weighted imaging portal venous phase

T2WI:

T2-weighted imaging

TE:

Echo time

TR:

Repetition time

VOI:

Volume of interest

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Funding

This study has received funding by NCI U01 CA172320.

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Authors and Affiliations

Authors

Corresponding author

Correspondence to Bachir Taouli.

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Guarantor

The scientific guarantor of this publication is Bachir Taouli.

Conflict of interest

The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.

Statistics and biometry

No complex statistical methods were necessary for this paper.

Informed consent

Written informed consent was obtained from 16 prospectively recruited patients as part of the NCI U01 CA172320. Written informed consent was waived by the Institutional Review Board for the rest of the cohort.

Ethical approval

Institutional Review Board approval was obtained.

Study subjects or cohorts overlap

Data from 16 patients have been previously reported in Bane-2016, Hectors-2016, Hectors-2017, and Jajamovich-2016.

Methodology

  • Retrospective

  • Observational

  • Performed at one institution

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Cite this article

Carbonell, G., Kennedy, P., Bane, O. et al. Precision of MRI radiomics features in the liver and hepatocellular carcinoma. Eur Radiol 32, 2030–2040 (2022). https://doi.org/10.1007/s00330-021-08282-1

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  • DOI: https://doi.org/10.1007/s00330-021-08282-1

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