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A predictive model for distinguishing radiation necrosis from tumour progression after gamma knife radiosurgery based on radiomic features from MR images

  • Oncology
  • Published:
European Radiology Aims and scope Submit manuscript

A Correction to this article was published on 14 March 2018

This article has been updated

Abstract

Objectives

To develop a model using radiomic features extracted from MR images to distinguish radiation necrosis from tumour progression in brain metastases after Gamma Knife radiosurgery.

Methods

We retrospectively identified 87 patients with pathologically confirmed necrosis (24 lesions) or progression (73 lesions) and calculated 285 radiomic features from four MR sequences (T1, T1 post-contrast, T2, and fluid-attenuated inversion recovery) obtained at two follow-up time points per lesion per patient. Reproducibility of each feature between the two time points was calculated within each group to identify a subset of features with distinct reproducible values between two groups. Changes in radiomic features from one time point to the next (delta radiomics) were used to build a model to classify necrosis and progression lesions.

Results

A combination of five radiomic features from both T1 post-contrast and T2 MR images were found to be useful in distinguishing necrosis from progression lesions. Delta radiomic features with a RUSBoost ensemble classifier had an overall predictive accuracy of 73.2% and an area under the curve value of 0.73 in leave-one-out cross-validation.

Conclusions

Delta radiomic features extracted from MR images have potential for distinguishing radiation necrosis from tumour progression after radiosurgery for brain metastases.

Key points

• Some radiomic features showed better reproducibility for progressive lesions than necrotic ones

• Delta radiomic features can help to distinguish radiation necrosis from tumour progression

• Delta radiomic features had better predictive value than did traditional radiomic features

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Change history

  • 14 March 2018

    The original version of this article, published on 24 November 2017, unfortunately contained a mistake.

Abbreviations

AUC:

Area under the curve

CCC:

Concordance correlation coefficient

COM:

Co-occurrence matrix

FLAIR:

Fluid-attenuated inversion recovery

HOG:

Histogram of oriented gradients

IBEX:

Imaging Biomarker Explorer

MRI:

Magnetic resonance imaging

NGTDM:

Neighbourhood grey-tone difference matrix

RLM:

Run length matrix

ROC:

Receiver operating characteristic

T1c:

T1 weighted post-contrast

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Acknowledgements

The authors would like to thank Christine Wogan for reviewing this manuscript.

This work was presented in part at the 2016 American Association of Physicists in Medicine Annual Meeting.

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Authors

Corresponding author

Correspondence to Jinzhong Yang.

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Guarantor

The scientific guarantor of this publication is Jing Li.

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.

Funding

This study has received funding by National Institutes of Health through Cancer Center Support Grant P30CA016672.

Statistics and biometry

No complex statistical methods were necessary for this paper.

Informed consent

Written informed consent was waived by the Institutional Review Board.

Ethical approval

Institutional Review Board approval was obtained.

Methodology

• retrospective

• experimental

• performed at one institution

Additional information

The original version of this article was revised: The presentation of Table 2 was incorrect.

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Zhang, Z., Yang, J., Ho, A. et al. A predictive model for distinguishing radiation necrosis from tumour progression after gamma knife radiosurgery based on radiomic features from MR images. Eur Radiol 28, 2255–2263 (2018). https://doi.org/10.1007/s00330-017-5154-8

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  • DOI: https://doi.org/10.1007/s00330-017-5154-8

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