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Abstract #2609

STI-net: reconstruction of the susceptibility tensor using deep neural network

Nestor Andres Muñoz1,2,3, Carlos Milovic4, Christian Langkammer5, and Cristian Tejos1,2,3
1Biomedical Imaging Center, Pontificia Universidad Catolica de Chile, Santiago, Chile, 2Department of Electrical Engineering, Pontificia Universidad Catolica de Chile, Santiago, Chile, 3Millennium Institute Millennium Institute for Intelligent Healthcare Engineering (iHEALTH), Santiago, Chile, 4School of Electrical Engineering, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile, 5Department of Neurology, Medical University of Graz, Graz, Austria

Synopsis

Keywords: Susceptibility/QSM, Susceptibility, Susceptibility Tensor Imaging

Motivation: When solving the Susceptibility Tensor Imaging problem, fast algorithms based on Least Squares require an elevated number of acquisitions, while more robust solvers that use DTI information may produce over-smoothed solutions.

Goal(s): To create a deep neural network based reconstruction algorithm to produce high SNR STI images with a reduced number of MRI acquisitions.

Approach: Use a physics-informed deep neural network approach, trained with various geometrical objects, capable of accurately reconstructing susceptibility tensors.

Results: We obtained susceptibility tensors with the expected anisotropy, better alignment with DTI eigenvectors and high SNR.

Impact: Our STI-net algorithm is capable of reconstructing accurate STI images with higher SNR, compared with traditional algorithms.

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