Radiomic assessment of the progression of acoustic neuroma after gamma knife stereotactic radiosurgery

Ganesh Narayanasamy, Geoffrey Zhang, Eric Siegel, Graham Campbell, Eduardo G. Moros, Edvaldo P. Galhardo, Steven Morrill, John Day, Jose Penagaricano


Introduction: The aim of this study was to determine whether radiomic features measured at baseline in Magnetic Resonance images (MRI) of acoustic neuromas (AN) can predict Gamma Knife (GK) treatment outcome.
Methods: The study was conducted on pre- and post-GK MRI-T2 scans of 32 patients with AN who underwent stereotactic radiosurgery (SRS) for 12 Gy dose. Radiomic features extracted include Intensity, Fractals, Laplacian of Gaussian and textural Co-Occurrence, Run-length (RL), Size Zone, and Neighborhood Gray-Tone Difference matrices (NGTDM) features. Subjects were classified as treatment failures (TF) if tumor volume increased > 10%. Pre- and post-SRS audiology reports were utilized in hearing evaluation.
Results: Fifteen subjects (47%) qualified as TFs. In univariate receiver operating characteristic (ROC) analysis, two radiomic
features, complexity in NGTDM and run percentage in RL, displayed areas under curves of > 0.65.
Conclusion: This initial radiomic study establishes features that illustrates the prognostic ability of the SRS treatment in acoustic
neuroma. Hearing preservation was achieved in a majority of acoustic neuroma patients treated in Gamma Knife.

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Journal of Solid Tumors

ISSN 1925-4067(Print)   ISSN 1925-4075(Online)

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