Abstract #3425

First MR Electrical Properties Tomography reconstruction challenge: phase 3 - conductivity reconstructions from measured data

Stefano Mandija^1,2, Alessandro Arduino³, Cornelis A. T. van den Berg^1,2, Patrick Fuchs⁴, Ilias Giannakopoulos⁵, Yusuf Ziya Ider⁶, Kyu-Jin Jung⁷, Ulrich Katscher⁸, Dong-Hyun Kim⁷, Riccardo Lattanzi⁵, Thierry G. Meerbothe^1,2, Khin Khin Tha⁹, and Luca Zilberti³

¹Department of Radiotherapy, University Medical Center Utrecht, Utrecht, Netherlands, ²Computational Imaging Group MR diagnostics & therapy, Center for Image Sciences, 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 and Center for Advanced Imaging Innovation and Research (CAI2R), 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, Germany, ⁹Global Center for Biomedical Science and Engineering, Hokkaido University Faculty of Medicine, Hokkaido, Japan

Synopsis

Keywords: Electromagnetic Tissue Properties, Electromagnetic Tissue Properties, Conductivity, MR-EPT, Challenge

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

Goal(s): To present the results of phase 3 of the MR-EPT reconstruction challenge.

Approach: MR measurements were performed for a cylindrical phantom, a 3D printed brain phantom, and a healthy volunteer. In each case, the transceive phase was measured using three different methods: bFFE, Spin-Echo, and Turbo Spin-Echo acquisitions.

Results: 38 participants submitted conductivity reconstructions. Not all participants reconstructed conductivity maps for all three different transceive phase maps. The reconstructed conductivity maps show large variability in quality (visual scoring by experts), and performance (accuracy and precision).

Impact: The results of phase 3 of the first MR-EPT reconstruction challenge show large variations in the estimated conductivity maps from measured data on phantoms and volunteer demonstrating the need of benchmarking reconstruction methods on common datasets.

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