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• W4385606949 abstract "With the increasing amount and growing variety of healthcare data, multimodal machine learning supporting integrated modeling of structured and unstructured data is an increasingly important tool for clinical machine learning tasks. However, it is non-trivial to manage the differences in dimensionality, volume, and temporal characteristics of data modalities in the context of a shared target task. Furthermore, patients can have substantial variations in the availability of data, while existing multimodal modeling methods typically assume data completeness and lack a mechanism to handle missing modalities. We propose a Transformer-based fusion model with modality-specific tokens that summarize the corresponding modalities to achieve effective cross-modal interaction accommodating missing modalities in the clinical context. The model is further refined by inter-modal, inter-sample contrastive learning to improve the representations for better predictive performance. We denote the model as Attention-based cRoss-MOdal fUsion with contRast (ARMOUR). We evaluate ARMOUR using two input modalities (structured measurements and unstructured text), six clinical prediction tasks, and two evaluation regimes, either including or excluding samples with missing modalities. Our model shows improved performances over unimodal or multimodal baselines in both evaluation regimes, including or excluding patients with missing modalities in the input. The contrastive learning improves the representation power and is shown to be essential for better results. The simple setup of modality-specific tokens enables ARMOUR to handle patients with missing modalities and allows comparison with existing unimodal benchmark results. We propose a multimodal model for robust clinical prediction to achieve improved performance while accommodating patients with missing modalities. This work lays a foundation for future work to study the effective incorporation of multiple modalities of clinical data into a single model." @default.
• W4385606949 created "2023-08-06" @default.
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• W4385606949 date "2023-09-01" @default.
• W4385606949 modified "2023-10-10" @default.
• W4385606949 title "Attention-based multimodal fusion with contrast for robust clinical prediction in the face of missing modalities" @default.
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• W4385606949 doi "https://doi.org/10.1016/j.jbi.2023.104466" @default.
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