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A Coupled-Mechanisms Modelling Framework for Neurodegeneration

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Medical Image Computing and Computer Assisted Intervention – MICCAI 2023 (MICCAI 2023)

Abstract

Computational models of neurodegeneration aim to emulate the evolving pattern of pathology in the brain during neurodegenerative disease, such as Alzheimer’s disease. Previous studies have made specific choices on the mechanisms of pathology production and diffusion, or assume that all the subjects lie on the same disease progression trajectory. However, the complexity and heterogeneity of neurodegenerative pathology suggests that multiple mechanisms may contribute synergistically with complex interactions, meanwhile the degree of contribution of each mechanism may vary among individuals. We thus put forward a coupled-mechanisms modelling framework which non-linearly combines the network-topology-informed pathology appearance with the process of pathology spreading within a dynamic modelling system. We account for the heterogeneity of disease by fitting the model at the individual level, allowing the epicenters and rate of progression to vary among subjects. We construct a Bayesian model selection framework to account for feature importance and parameter uncertainty. This provides a combination of mechanisms that best explains the observations for each individual. With the obtained distribution of mechanism importance for each subject, we are able to identify subgroups of patients sharing similar combinations of apparent mechanisms.

E. Thompson and A. Schroder—Contributed equally to this work as the co-second authors.

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Notes

  1. 1.

    Data used in preparation of this article were obtained from the Alzheimer’s Disease Neuroimaging Initiative (ADNI) database (adni.loni.usc.edu). As such, the investigators within the ADNI contributed to the design and implementation of ADNI and/or provided data but did not participate in analysis or writing of this report. A complete listing of ADNI investigators can be found at: http://adni.loni.usc.edu/wp-content/uploads/how_to_apply/ADNI_Acknowledgement_List.pdf

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Acknowledgment

TH, AS and AA are supported by the EPSRC funded UCL Centre for Doctoral Training in Intelligent, Integrated Imaging in Healthcare[EP/S021930/1]; TH, ET and DCA are supported by the Wellcome Trust(221915); DCA and FB are supported by the NIHR Biomedical Research Centre at UCLH and UCL; NPO acknowledges funding from a UKRI Future Leaders Fellowship(MR/S03546X/1).

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Correspondence to Tiantian He .

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He, T. et al. (2023). A Coupled-Mechanisms Modelling Framework for Neurodegeneration. In: Greenspan, H., et al. Medical Image Computing and Computer Assisted Intervention – MICCAI 2023. MICCAI 2023. Lecture Notes in Computer Science, vol 14227. Springer, Cham. https://doi.org/10.1007/978-3-031-43993-3_45

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  • DOI: https://doi.org/10.1007/978-3-031-43993-3_45

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