Discovering robust biomarkers of neurological disorders from functional MRI using graph neural networks: A Review

• URL: http://arxiv.org/abs/2405.00577v1
• Date: Wed, 1 May 2024 15:29:55 GMT
• Title: Discovering robust biomarkers of neurological disorders from functional MRI using graph neural networks: A Review
• Authors: Yi Hao Chan, Deepank Girish, Sukrit Gupta, Jing Xia, Chockalingam Kasi, Yinan He, Conghao Wang, Jagath C. Rajapakse,
• Abstract summary: We provide an overview of how GNN and model explainability techniques have been applied on fMRI datasets for disorder prediction tasks. We find that while most studies have performant models, salient features highlighted in these studies vary greatly across studies on the same disorder. We suggest establishing new standards that are based on objective evaluation metrics to determine the robustness of these potential biomarkers.
• Score: 4.799269666410891
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Graph neural networks (GNN) have emerged as a popular tool for modelling functional magnetic resonance imaging (fMRI) datasets. Many recent studies have reported significant improvements in disorder classification performance via more sophisticated GNN designs and highlighted salient features that could be potential biomarkers of the disorder. In this review, we provide an overview of how GNN and model explainability techniques have been applied on fMRI datasets for disorder prediction tasks, with a particular emphasis on the robustness of biomarkers produced for neurodegenerative diseases and neuropsychiatric disorders. We found that while most studies have performant models, salient features highlighted in these studies vary greatly across studies on the same disorder and little has been done to evaluate their robustness. To address these issues, we suggest establishing new standards that are based on objective evaluation metrics to determine the robustness of these potential biomarkers. We further highlight gaps in the existing literature and put together a prediction-attribution-evaluation framework that could set the foundations for future research on improving the robustness of potential biomarkers discovered via GNNs.

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