Solving the Electrical Impedance Tomography Problem with a DeepONet Type Neural Network: Theory and Application
<|reference_start|>Solving the Electrical Impedance Tomography Problem with a DeepONet Type Neural Network: Theory and Application: In this work, we consider the non-invasive medical imaging modality of Electrical Impedance Tomography, where the problem is to recover the conductivity in a medium from a set of data that arises out of a current-to-voltage map (Neumann-to-Dirichlet operator) defined on the boundary of the medium. We formulate this inverse problem as an operator-learning problem where the goal is to learn the implicitly defined operator-to-function map between the space of Neumann-to-Dirichlet operators to the space of admissible conductivities. Subsequently, we use an operator-learning architecture, popularly called DeepONets, to learn this operator-to-function map. Thus far, most of the operator learning architectures have been implemented to learn operators between function spaces. In this work, we generalize the earlier works and use a DeepONet to actually {learn an operator-to-function} map. We provide a Universal Approximation Theorem type result which guarantees that this implicitly defined operator-to-function map between the space of Neumann-to-Dirichlet operator to the space of conductivity function can be approximated to an arbitrary degree using such a DeepONet. Furthermore, we provide a computational implementation of our proposed approach and compare it against a standard baseline. We show that the proposed approach achieves good reconstructions and outperforms the baseline method in our experiments.<|reference_end|>
@article{abhishek2024solving,
    title={Solving the Electrical Impedance Tomography Problem with a DeepONet Type
  Neural Network: Theory and Application},
    author={Anuj Abhishek and Thilo Strauss},
    journal={arXiv preprint arXiv:2407.17182},
    year={2024},
    archivePrefix={arXiv},
    eprint={2407.17182},
    primaryClass={cs.LG}
}