Intravoxel incoherent motion metrics as potential biomarkers for survival in glioblastoma

Josep Puig, Javier Sánchez-González, Gerard Blasco, Pepus Daunis-I-Estadella, Christian Federau, Ángel Alberich-Bayarri, Carles Biarnes, Kambiz Nael, Marco Essig, Rajan Jain, Max Wintermark, Salvador Pedraza

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Objective: Intravoxel incoherent motion (IVIM) is an MRI technique with potential applications in measuring brain tumor perfusion, but its clinical impact remains to be determined. We assessed the usefulness of IVIM-metrics in predicting survival in newly diagnosed glioblastoma. Methods: Fifteen patients with glioblastoma underwent MRI including spin-echo echo-planar DWI using 13 b-values ranging from 0 to 1000 s/mm2. Parametric maps for diffusion coefficient (D), pseudodiffusion coefficient (D∗), and perfusion fraction (f) were generated for contrast-enhancing regions (CER) and non-enhancing regions (NCER). Regions of interest were manually drawn in regions of maximum f and on the corresponding dynamic susceptibility contrast images. Prognostic factors were evaluated by Kaplan-Meier survival and Cox proportional hazards analyses. Results: We found that fCER and D∗CER correlated with rCBFCER. The best cutoffs for 6-month survival were fCER>9.86% and D∗CER>21.712×10-3mm2/s (100% sensitivity, 71.4% specificity, 100% and 80% positive predictive values, and 80% and 100% negative predictive values; AUC:0.893 and 0.857, respectively). Treatment yielded the highest hazard ratio (5.484; 95% CI: 1.162-25.88; AUC: 0.723; P = 0.031); fCER combined with treatment predicted survival with 100% accuracy. Conclusions: The IVIM-metrics fCER and D∗CER are promising biomarkers of 6-month survival in newly diagnosed glioblastoma.

Original languageEnglish (US)
Article numbere0158887
JournalPloS one
Volume11
Issue number7
DOIs
StatePublished - Jul 2016

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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