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Abstract #2635

Microstructural neuroimaging using spherical convolutional neural networks

Leevi Kerkelä1, Kiran Seunarine2, Filip Szczepankiewicz3, and Chris A. Clark1
1UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom, 2Great Ormond Street Hospital, London, United Kingdom, 3Clinical Sciences Lund, Lund University, Lund, Sweden

Synopsis

Keywords: White Matter, Machine Learning/Artificial IntelligenceWe present a novel framework for estimating microstructural parameters of compartment models using recently developed orientationally invariant spherical convolutional neural networks and efficiently simulated training data. The networks were trained to predict the ground-truth parameter values from simulated noisy data and applied on imaging data acquired in a clinical setting to generate microstructural maps. Our network could estimate model parameters more accurately than conventional non-linear least squares or a multi-layer perceptron applied on powder-averaged data (i.e., the spherical mean technique).

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Keywords