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Communication Dans Un Congrès Année : 2020

Joint data imputation and mechanistic modelling for simulating heart-brain interactions in incomplete datasets

Résumé

The use of mechanistic models in clinical studies is limited by the lack of multi-modal patients data representing different anatomical and physiological processes. For example, neuroimaging datasets do not provide a sufficient representation of heart features for the modeling of cardiovascular factors in brain disorders. To tackle this problem we introduce a probabilistic framework for joint cardiac data imputation and personalisation of cardiovascular mechanistic models, with application to brain studies with incomplete heart data. Our approach is based on a variational framework for the joint inference of an imputation model of cardiac information from the available features, along with a Gaussian Process emulator that can faithfully reproduce personalised cardiovas-cular dynamics. Experimental results on UK Biobank show that our model allows accurate imputation of missing cardiac features in datasets containing minimal heart information, e.g. systolic and diastolic blood pressures only, while jointly estimating the emulated parameters of the lumped model. This allows a novel exploration of the heart-brain joint relationship through simulation of realistic cardiac dynamics corresponding to different conditions of brain anatomy.
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Dates et versions

hal-02952576 , version 1 (29-09-2020)
hal-02952576 , version 2 (06-10-2020)

Identifiants

Citer

Jaume Banus, Maxime Sermesant, Oscar Camara, Marco Lorenzi. Joint data imputation and mechanistic modelling for simulating heart-brain interactions in incomplete datasets. MICCAI 2020 - 23th International Conference on Medical Image Computing and Computer Assisted Intervention, Oct 2020, Lima / Virtual, Peru. pp.478-486, ⟨10.1007/978-3-030-59725-2_46⟩. ⟨hal-02952576v2⟩
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