Papers › End-to-end localized deep learning for Cryo-ET
End-to-end localized deep learning for Cryo-ET
Vinith Kishore, Valentin Debarnot, Ricardo D. Righetto, AmirEhsan Khorashadizadeh, Benjamin D. Engel, Ivan Dokmanić
Cryo-electron tomography (cryo-ET) enables 3D visualization of cellular environments. Accurate reconstruction of high-resolution volumes is complicated by the very low signal-to-noise ratio and a restricted range of sample tilts, creating a missing wedge of Fourier information. Recent self-supervised deep learning approaches, which post-process initial reconstructions done by filtered backprojection (FBP), have significantly improved reconstruction quality, but they are computationally expensive, demand large memory, and require retraining for each new dataset. End-to-end supervised learning is an appealing alternative but is impeded by the lack of ground truth and the large memory demands of high-resolution volumetric data. Training on synthetic data often leads to overfitting and poor generalization to real data, and, to date, no general end-to-end deep learning reconstructors exist for cryo-ET. In this work, we introduce CryoLithe, a local, memory-efficient reconstruction network that directly estimates the volume from an aligned tilt-series, overcoming the suboptimal FBP. We demonstrate that leveraging transform-domain locality makes our network robust to distribution shifts, enabling effective supervised training and giving excellent results on real data -- without retraining or fine-tuning.
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