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Contributed Talk: Resolution-adaptive networks for uniform performance across heterogeneous medical image cohorts

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RCLW05 - AI Across Scales: From Molecules to Planet Earth

In the setting of clinical imaging, differences in between vendors, hospitals and sequences can yield highly inhomogeneous imaging data. In MRI imaging in particular, voxel dimension, slice spacing and acquisition plane can vary dramatically .The usual strategy to deal with heterogeneity of resolution is harmonization by resampling to a common spatial resolution. This can lead to loss of fidelity arising from interpolation artifacts out-of-plane and downsampling in-plane. We propose a network architecture designed to be able to learn directly from spatially heterogeneous data, without resampling: a segmentation network based on the e3nn framework that leverages a spherical harmonic, rather than voxel-grid, parameterization of convolutional kernels, with a fixed physical radius.

This talk is part of the Isaac Newton Institute Seminar Series series.

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