Glioblastoma and radiotherapy: A multicenter AI study for Survival Predictions from MRI (GRASP study)

Alysha Chelliah, David A. Wood, Liane S. Canas, Haris Shuaib, Stuart Currie, Kavi Fatania, Russell Frood, Chris Rowland-Hill, Stefanie Thust, Stephen J. Wastling, Sean Tenant, Catherine McBain, Karen Foweraker, Matthew Williams, Qiquan Wang, Andrei Roman, Carmen Dragos, Mark MacDonald, Yue Hui Lau, Christian A. LinaresAhmed Bassiouny, Aysha Luis, Thomas Young, Juliet Brock, Edward Chandy, Erica Beaumont, Tai Chung Lam, Liam Welsh, Joanne Lewis, Ryan Mathew, Eric Kerfoot, Richard Brown, Daniel Beasley, Jennifer Glendenning, Lucy Brazil, Angela Swampillai, Keyoumars Ashkan, Sébastien Ourselin, Marc Modat, Thomas C. Booth*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Background. The aim was to predict survival of glioblastoma at 8 months after radiotherapy (a period allowing for completing a typical course of adjuvant temozolomide), by applying deep learning to the first brain MRI after radiotherapy completion. Methods. Retrospective and prospective data were collected from 206 consecutive glioblastoma, isocitrate dehydrogenase -wildtype patients diagnosed between March 2014 and February 2022 across 11 UK centers. Models were trained on 158 retrospective patients from 3 centers. Holdout test sets were retrospective (n = 19; internal validation), and prospective (n = 29; external validation from 8 distinct centers). Neural network branches for T2weighted and contrast-enhanced T1-weighted inputs were concatenated to predict survival. A nonimaging branch (demographics/MGMT/treatment data) was also combined with the imaging model. We investigated the influence of individual MR sequences; nonimaging features; and weighted dense blocks pretrained for abnormality detection. Results. The imaging model outperformed the nonimaging model in all test sets (area under the receiver-operating characteristic curve, AUC P = .038) and performed similarly to a combined imaging/nonimaging model (P > .05). Imaging, nonimaging, and combined models applied to amalgamated test sets gave AUCs of 0.93, 0.79, and 0.91. Initializing the imaging model with pretrained weights from 10 000s of brain MRIs improved performance considerably (amalgamated test sets without pretraining 0.64; P = .003). Conclusions. A deep learning model using MRI images after radiotherapy reliably and accurately determined survival of glioblastoma. The model serves as a prognostic biomarker identifying patients who will not survive beyond a typical course of adjuvant temozolomide, thereby stratifying patients into those who might require early second-line or clinical trial treatment.

Original languageEnglish
Pages (from-to)1138-1151
Number of pages14
JournalNeuro-oncology
Volume26
Issue number6
DOIs
Publication statusPublished - 1 Jun 2024

Keywords

  • artificial intelligence
  • deep learning
  • glioblastoma
  • magnetic resonance imaging
  • survival

Fingerprint

Dive into the research topics of 'Glioblastoma and radiotherapy: A multicenter AI study for Survival Predictions from MRI (GRASP study)'. Together they form a unique fingerprint.

Cite this