Scientific Imaging: Materials and Connectomics

Machine learning and image analysis for microscopy from nuclear-materials to connectomics. Converting dense ultrastructural EM into segmentations and reconstructions for neural circuit analysis.

Scientific imaging domains such as electron microscopy produce exceptionally rich data, but extracting quantitative insight from these images often requires substantial expert effort. This theme focuses on machine learning and image analysis methods for microscopy-based scientific discovery across both materials science and biomedicine. On the materials side, we study morphology, texture, and multiscale structure in electron microscopy images to support characterization of complex materials and nuclear materials workflows. On the biomedical side, we develop methods for connectomics from electron microscopy, where dense ultrastructural imagery must be converted into reliable segmentations and reconstructions before neural circuits can be studied. Across both areas, the common challenge is the same: scientifically valuable images contain fine-scale structure that is too complex and too voluminous for manual analysis alone.

Methodologically, this work emphasizes scalable, structure-aware learning for difficult imaging regimes. We develop segmentation methods for dense microscopy data, representation-learning approaches that capture morphology across magnifications and imaging conditions, and robust modeling strategies that can transfer across instruments, samples, and acquisition settings. In connectomics, this includes learning from limited supervision and exploiting the hierarchical structure of segmentation problems in large EM volumes. In materials imaging, it includes automated morphology analysis, multiscale classification, and domain-adaptive modeling for robust characterization pipelines. The broader goal is to turn expert-intensive microscopy analysis into reproducible, scalable, and quantitatively reliable computation that can accelerate discovery in both the physical and biological sciences.

Methods

Image segmentationSelf-supervised learningMorphology analysisTexture classification

Application Areas

Nuclear materialsElectron microscopyMaterials characterization

Selected Projects

Selected Publications

Improving uranium oxide pathway discernment and generalizability using contrastive self-supervised learning

Jakob Johnson, Luther McDonald, Tolga Tasdizen

Computational Materials Science 2024

Improving robustness for model discerning synthesis process of uranium oxide with unsupervised domain adaptation

Cuong Ly, Cody Nizinski, Alex Hagen, Luther W McDonald, Tolga Tasdizen

Frontiers in Nuclear Engineering 2023

Determining uranium ore concentrates and their calcination products via image classification of multiple magnifications

Cuong Ly, Clement Vachet, Ian Schwerdt, Erik Abbott, Alexandria Brenkmann, Luther W. McDonald, Tolga Tasdizen

Journal of Nuclear Materials 2020

A new approach for quantifying morphological features of U3O8 for nuclear forensics using a deep learning model

Cuong Ly, Adam M. Olsen, Ian J. Schwerdt, Reid Porter, Kari Sentz, Luther W. McDonald, Tolga Tasdizen

Journal of Nuclear Materials 2019

A modular hierarchical approach to 3D electron microscopy image segmentation

Ting Liu, Cory Jones, Mojtaba Seyedhosseini, Tolga Tasdizen

Journal of Neuroscience Methods 2014

Image Segmentation with Cascaded Hierarchical Models and Logistic Disjunctive Normal Networks

Mojtaba Seyedhosseini, Mehdi Sajjadi, Tolga Tasdizen

IEEE International Conference on Computer Vision (ICCV) 2013

Exploring the retinal connectome

James R. Anderson, Bryan W. Jones, Carl B. Watt, Margaret V. Shaw, Jia-Hui Yang, David DeMill, James S. Lauritzen, Yanhua Lin, Kevin D. Rapp, David Mastronarde, et al.

Molecular Vision 2011

Three-dimensional reconstruction of serial mouse brain sections: solution for flattening high-resolution large-scale mosaics

Monica L. Berlanga, Sébastien Phan, Eric A. Bushong, Stephanie Wu, Ohkyung Kwon, Binh S. Phung, Steve Lamont, Masako Terada, Tolga Tasdizen, Maryann E. Martone, et al.

Frontiers in Neuroanatomy 2011

A Computational Framework for Ultrastructural Mapping of Neural Circuitry

James R. Anderson, Bryan W. Jones, Jia-Hui Yang, Marguerite V. Shaw, Carl B. Watt, Pavel Koshevoy, Joel Spaltenstein, Elizabeth Jurrus, Kannan UV, Ross T. Whitaker, et al.

PLOS Biology 2009

Axon Tracking in Serial Block-Face Scanning Electron Microscopy

Elizabeth Jurrus, Melissa Hardy, Tolga Tasdizen, P. Thomas Fletcher, Pavel Koshevoy, Chi-Bin Chien, Winfried Denk, Ross T. Whitaker

Medical Image Analysis 2009