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Abstract #4520

Asymmetry-Aware Pretraining: A Path to Universal Brain MRI Analysis Model

Yang Ma1,2, Dongang Wang2,3, Peilin Liu2,4, Michael Barnett2,3,5, Weidong Cai1, and Chenyu Wang2,3
1School of Computer Science, University of Sydney, Sydney, Australia, 2Brain and Mind Centre, University of Sydney, Sydney, Australia, 3Sydney Neuroimaging Analysis Centre, Sydney, Australia, 4School of Mathematics and Statistics, University of Sydney, Sydney, Australia, 5Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia

Synopsis

Keywords: Diagnosis/Prediction, Brain

Motivation: Many brain disorders present with asymmetrical features, which can be utilized to advance the classification of disease through deep learning.



Goal(s): We aim to investigate how asymmetry awareness can improve model performance to identify brain disorders, subsequently facilitating better early diagnosis and intervention.

Approach: Our approach involved initial pretraining with a focus on asymmetry awareness using conditional contrastive learning. Subsequently, finetuning was performed for various downstream tasks with limited training data.



Results: Our approach is proven superior in identifying brain disorders compared with baseline methods that either directly trained for specific diseases or with pretrained model without considering symmetrical features of input images.



Impact: Our research pioneers the integration of asymmetry awareness in pretraining models for the detection of brain disorders. The superior performance fully illustrated the feasibility and potential of leveraging the asymmetry nature of brain disease for broad deep learning tasks.



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Keywords