Journal
MEDICAL IMAGE COMPUTING AND COMPUTER ASSISTED INTERVENTION, MICCAI 2022, PT I
Volume 13431, Issue -, Pages 3-13Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/978-3-031-16431-6_1
Keywords
Variational auto encoders; Mixed-effects models; Disease progression models; Alzheimer's Disease
Categories
Funding
- H2020 programme [678304, 826421]
- ANR [ANR-10-IAIHU-06, ANR-19-P3IA-0001, ANR-19-JPW2-000]
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Disease progression models are important for understanding degenerative diseases, but rarely used for entire medical images. This study combines a Variational Auto Encoder with a temporal linear mixed-effect model to learn a latent representation of the data and recover patterns of structural and metabolic alterations of the brain.
Disease progression models are crucial to understanding degenerative diseases. Mixed-effects models have been consistently used to model clinical assessments or biomarkers extracted from medical images, allowing missing data imputation and prediction at any time-point. However, such progression models have seldom been used for entire medical images. In this work, a Variational Auto Encoder is coupled with a temporal linear mixed-effect model to learn a latent representation of the data such that individual trajectories follow straight lines over time and are characterised by a few interpretable parameters. A Monte Carlo estimator is devised to iteratively optimize the networks and the statistical model. We apply this method on a synthetic data set to illustrate the disentanglement between time dependant changes and inter-subjects variability, as well as the predictive capabilities of the method. We then apply it to 3D MRI and FDG-PET data from the Alzheimer's Disease Neuroimaging Initiative (ADNI) to recover well documented patterns of structural and metabolic alterations of the brain.
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