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Abstract #2394

Signal Behavior of FLASE and TSE for Measuring Trabecular Bone - Theory and Experiments

Jakob Kreutner1, Peter M. Jakob1, 2, Daniel Haddad3

1Research Center Magnetic-Resonance-Bavaria, Wrzburg, Bavaria, Germany; 2Experimental Physics 5, University of Wrzburg, Wrzburg, Bavaria, Germany; 3MRB Research Center, Wrzburg, Bavaria, Germany

The usage of spin echo sequences for imaging trabecular bone is limited by the low number of echoes that can be acquired per excitation due to the long echo spacing compared to T2-relaxation. Instead of using a 90 excitation pulse and wait for full T1-relaxation, we calculated the signal for different combinations of turbo factor, repetition time and excitation angle with constant scan time and compared these to a widely-used FLASE protocol. Calculations and experiments show in good agreement, that TSE can achieve a higher signal than FLASE at the cost of a slightly broadened point spread function.