Abstract #0182

The first MR Electrical Properties Tomography (MR-EPT) reconstruction challenge: preliminary results of simulated data

Stefano Mandija^1,2, Alessandro Arduino*³, Cornelis A.T. van den Berg*^1,2, Patrick Fuchs*⁴, Ilias Giannakopoulos*⁵, Yusuf Ziya Ider*⁶, Kyu-Jin Jung*⁷, Ulrich Katscher*⁸, Dong-Hyun Kim*⁷, Riccardo Lattanzi*^5,9, Thierry G. Meerbothe*^1,2, Khin-Khin Tha*¹⁰, and Luca Zilberti*³

¹Department of Radiotherapy, University Medical Center Utrecht, Utrecht, Netherlands, ²Computational Imaging Group for MR Therapy and Diagnostics, University Medical Center Utrecht, Utrecht, Netherlands, ³Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, Italy, ⁴Department of Medical Physics and Biomedical Engineering, University College London, London, United Kingdom, ⁵The Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, ⁶Department of Biomedical Engineering, Baskent University, Ankara, Turkey, ⁷Department of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea, Republic of, ⁸Philips Research Hamburg, Hamburg, Germany, ⁹Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, ¹⁰Hokkaido University Faculty of Medicine, Hokkaido, Japan

Synopsis

Keywords: Electromagnetic Tissue Properties, Electromagnetic Tissue Properties, Conductivity

Motivation: To benchmark MR-Electrical Properties Tomography (MR-EPT) reconstruction methods.

Goal(s): To present an overview of the first MR-EPT reconstruction challenge participation and the results of its phase 1.

Approach: The challenge consisted of 3 phases:1) reconstructions from a simulated (blind) dataset (ground-truth EPs not provided);2) reconstructions from several simulated dataset (ground-truth EPs provided for few training dataset for tuning algorithm parameters);3) EPs reconstructions from measured data.

Results: 52 participants registered to the challenge; 39 submitted their results. For phase 1, all participants submitted a reconstructed conductivity map; 12 submitted a reconstructed permittivity map. The results show large variability in reconstruction accuracy and precision.

Impact: The results of phase 1 of the first MR-EPT reconstruction challenge show large variations in the estimated conductivity and permittivity maps demonstrating the need of benchmarking reconstruction methods on common datasets.

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