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Abstract #4938

Echo time-dependent reproducibility of Quantitative Susceptibility Mapping at different field strength

Marta Lancione1,2, Graziella Donatelli3, Paolo Cecchi4, Mirco Cosottini3, Michela Tosetti2, and Mauro Costagli2

1IMT School for Advanced Studies, Lucca, Italy, 2IMAGO 7 Foundation and IRCCS Stella Maris, Pisa, Italy, 3University of Pisa, Pisa, Italy, 4Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy

The assessment of reproducibility of Quantitative Susceptibility Mapping (QSM) is critical in multi-center studies and clinical follow-ups. However, many experimental factors and acquisition parameters may compromise quantification accuracy. In this work, we analyze the impact of echo time on intra-scanner repeatability and inter-scanner reproducibility of QSM using a 3D multi-echo GRE sequence on MRI scanners of different field strength (3T and 7T) from the same vendor.

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