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Predictive value of initial FDG-PET features for treatment response and survival in esophageal cancer patients treated with chemo-radiation therapy using a random forest classifier

Author

Listed:
  • Paul Desbordes
  • Su Ruan
  • Romain Modzelewski
  • Pascal Pineau
  • Sébastien Vauclin
  • Pierrick Gouel
  • Pierre Michel
  • Frédéric Di Fiore
  • Pierre Vera
  • Isabelle Gardin

Abstract

Purpose: In oncology, texture features extracted from positron emission tomography with 18-fluorodeoxyglucose images (FDG-PET) are of increasing interest for predictive and prognostic studies, leading to several tens of features per tumor. To select the best features, the use of a random forest (RF) classifier was investigated. Methods: Sixty-five patients with an esophageal cancer treated with a combined chemo-radiation therapy were retrospectively included. All patients underwent a pretreatment whole-body FDG-PET. The patients were followed for 3 years after the end of the treatment. The response assessment was performed 1 month after the end of the therapy. Patients were classified as complete responders and non-complete responders. Sixty-one features were extracted from medical records and PET images. First, Spearman’s analysis was performed to eliminate correlated features. Then, the best predictive and prognostic subsets of features were selected using a RF algorithm. These results were compared to those obtained by a Mann-Whitney U test (predictive study) and a univariate Kaplan-Meier analysis (prognostic study). Results: Among the 61 initial features, 28 were not correlated. From these 28 features, the best subset of complementary features found using the RF classifier to predict response was composed of 2 features: metabolic tumor volume (MTV) and homogeneity from the co-occurrence matrix. The corresponding predictive value (AUC = 0.836 ± 0.105, Se = 82 ± 9%, Sp = 91 ± 12%) was higher than the best predictive results found using the Mann-Whitney test: busyness from the gray level difference matrix (P

Suggested Citation

  • Paul Desbordes & Su Ruan & Romain Modzelewski & Pascal Pineau & Sébastien Vauclin & Pierrick Gouel & Pierre Michel & Frédéric Di Fiore & Pierre Vera & Isabelle Gardin, 2017. "Predictive value of initial FDG-PET features for treatment response and survival in esophageal cancer patients treated with chemo-radiation therapy using a random forest classifier," PLOS ONE, Public Library of Science, vol. 12(3), pages 1-17, March.
  • Handle: RePEc:plo:pone00:0173208
    DOI: 10.1371/journal.pone.0173208
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    1. Hugo J. W. L. Aerts & Emmanuel Rios Velazquez & Ralph T. H. Leijenaar & Chintan Parmar & Patrick Grossmann & Sara Carvalho & Johan Bussink & René Monshouwer & Benjamin Haibe-Kains & Derek Rietveld & F, 2014. "Decoding tumour phenotype by noninvasive imaging using a quantitative radiomics approach," Nature Communications, Nature, vol. 5(1), pages 1-9, September.
    2. Hugo J.W.L. Aerts & Emmanuel Rios Velazquez & Ralph T.H. Leijenaar & Chintan Parmar & Patrick Grossmann & Sara Carvalho & Johan Bussink & René Monshouwer & Benjamin Haibe-Kains & Derek Rietveld & Fran, 2014. "Correction: Corrigendum: Decoding tumour phenotype by noninvasive imaging using a quantitative radiomics approach," Nature Communications, Nature, vol. 5(1), pages 1-1, December.
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