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Abstract #4217

Rapid Field-Cycling Relaxometric Imaging Using Fast Spin-Echo

Peter J. Ross1, Lionel M. Broche1, Kerrin J. Pine1, David J. Lurie1

1Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, Scotland, United Kingdom

Fast Field-Cycling (FFC) adds a new dimension to MRI by rapidly switching B0 between levels during a pulse sequence. In this way it is possible to observe the variation of tissue T1 with field strength. Relaxometric FFC imaging collects data for T1 images at a range of field strengths, but is inherently time-consuming. We have greatly increased the speed of acquisition by collecting only one inversion-recovery image per field and by implementing an FFC Fast Spin-Echo sequence. Typical acquisition time is 30 min for a set of T1 images at 22 field strengths, making volunteer or clinical studies feasible.