In this work, we compare the performance of QSM at 7T versus 3T in an intra-scanner test-retest experiment with varying echo numbers and in an image quality analysis. QSM was reproducible within fixed field strength when the same number of echoes were used. Across field strengths and with different numbers of echoes, QSM was reproducible between the 3T acquisition with 10 echoes and the 7T acquisition with 5 echoes. The preliminary data suggest that 7T can be used to shorten QSM acquisition time or enable higher resolution QSM in clinically acceptable scan times.
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