Key result
Adiabatic DANTE inversion sequences generate uniform grid contrast over a sixfold B1 variation in animal hearts.
Why the study?
A technique to generate uniform myocardial tagging contrast despite B1 inhomogeneities was needed to improve cardiac wall motion imaging.
Adiabatic DANTE inversion sequences provide a robust method for myocardial tagging with uniform contrast despite B1 field inhomogeneities.
May facilitate B1-robust cardiac tagging; leaves open human translation and trials.
A new technique, based on adiabatic delays alternating with mutations for tailored excitation (DANTE) inversion sequences, is presented for generating uniform contrast tags across the myocardial wall even in the presence of B1 inhomogeneities. The utility of this pulse was demonstrated using a surface coil for both transmission and signal reception in phantom and animal heart tagging studies. The experimental data demonstrated uniform grid contrast over a sixfold variation of B1 magnitude, sharp tagging profiles, and the ability to follow the cardiac wall motion through the deformation of the fine rectangular tagging grid at different phases throughout the cardiac cycle.
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Tsekos et al. (1995) studied this question. Adiabatic DANTE inversion sequences was evaluated on Uniform contrast tags across the myocardial wall. Adiabatic DANTE inversion sequences generated uniform grid contrast over a sixfold variation of B1 magnitude and sharp tagging profiles in phantom and animal heart studies.
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